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is-link">Go</button> </div> </div> </form> </div> </div> <ol class="breathe-horizontal" start="1"> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2407.11912">arXiv:2407.11912</a> <span> [<a href="https://arxiv.org/pdf/2407.11912">pdf</a>, <a href="https://arxiv.org/format/2407.11912">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> </div> <p class="title is-5 mathjax"> The CONUS+ experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Collaboration%2C+T+C">The CONUS+ Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=%3A"> :</a>, <a href="/search/hep-ex?searchtype=author&query=Ackermann%2C+N">N. Ackermann</a>, <a href="/search/hep-ex?searchtype=author&query=Armbruster%2C+S">S. Armbruster</a>, <a href="/search/hep-ex?searchtype=author&query=Bonet%2C+H">H. Bonet</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Fulber%2C+K">K. Fulber</a>, <a href="/search/hep-ex?searchtype=author&query=Hakenmuller%2C+J">J. Hakenmuller</a>, <a href="/search/hep-ex?searchtype=author&query=Hempfling%2C+J">J. Hempfling</a>, <a href="/search/hep-ex?searchtype=author&query=Heusser%2C+G">G. Heusser</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Maneschg%2C+W">W. Maneschg</a>, <a href="/search/hep-ex?searchtype=author&query=Ni%2C+K">K. Ni</a>, <a href="/search/hep-ex?searchtype=author&query=Rank%2C+M">M. Rank</a>, <a href="/search/hep-ex?searchtype=author&query=Rink%2C+T">T. Rink</a>, <a href="/search/hep-ex?searchtype=author&query=Garcia%2C+E+S">E. Sanchez Garcia</a>, <a href="/search/hep-ex?searchtype=author&query=Stalder%2C+I">I. Stalder</a>, <a href="/search/hep-ex?searchtype=author&query=Strecker%2C+H">H. Strecker</a>, <a href="/search/hep-ex?searchtype=author&query=Wink%2C+R">R. Wink</a>, <a href="/search/hep-ex?searchtype=author&query=Woenckhaus%2C+J">J. Woenckhaus</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2407.11912v1-abstract-short" style="display: inline;"> The CONUS+ experiment aims to detect coherent elastic neutrino-nucleus scattering (CEvNS) of reactor antineutrinos on germanium nuclei in the fully coherent regime, continuing on this way the CONUS physics program started at the Brokdorf nuclear power plant, Germany. The CONUS+ setup is installed in the nuclear power plant in Leibstadt, Switzerland, at a distance of 20.7 m from the 3.6 GW thermal… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.11912v1-abstract-full').style.display = 'inline'; document.getElementById('2407.11912v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2407.11912v1-abstract-full" style="display: none;"> The CONUS+ experiment aims to detect coherent elastic neutrino-nucleus scattering (CEvNS) of reactor antineutrinos on germanium nuclei in the fully coherent regime, continuing on this way the CONUS physics program started at the Brokdorf nuclear power plant, Germany. The CONUS+ setup is installed in the nuclear power plant in Leibstadt, Switzerland, at a distance of 20.7 m from the 3.6 GW thermal power reactor core. The CEvNS signature will be measured with the same four point-contact high-purity germanium (HPGe) detectors produced for the former experiment, however refurbished and with optimized low energy thresholds. To suppress the background in the CONUS+ detectors, the passive and active layers of the original CONUS shield were modified such to fit better to the significantly changed background conditions at the new experimental location. New data acquisition and monitoring systems were developed. A direct network connection between the experiment and the Max-Planck-Institut fur Kernphysik (MPIK) makes it possible to control and monitor data acquisition in real time. The impact of all these modifications is discussed with particular emphasis on the resulting CEvNS signal prediction for the first data collection phase of CONUS+. Prospects of the planned upgrade in a second phase integrating new larger HPGe detectors are also discussed. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2407.11912v1-abstract-full').style.display = 'none'; document.getElementById('2407.11912v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 16 July, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">14 pages. 12 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2401.07684">arXiv:2401.07684</a> <span> [<a href="https://arxiv.org/pdf/2401.07684">pdf</a>, <a href="https://arxiv.org/format/2401.07684">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Final CONUS results on coherent elastic neutrino nucleus scattering at the Brokdorf reactor </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Ackermann%2C+N">N. Ackermann</a>, <a href="/search/hep-ex?searchtype=author&query=Bonet%2C+H">H. Bonet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=F%C3%BClber%2C+K">K. F眉lber</a>, <a href="/search/hep-ex?searchtype=author&query=Hakenm%C3%BCller%2C+J">J. Hakenm眉ller</a>, <a href="/search/hep-ex?searchtype=author&query=Hempfling%2C+J">J. Hempfling</a>, <a href="/search/hep-ex?searchtype=author&query=Henrichs%2C+J">J. Henrichs</a>, <a href="/search/hep-ex?searchtype=author&query=Heusser%2C+G">G. Heusser</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Maneschg%2C+W">W. Maneschg</a>, <a href="/search/hep-ex?searchtype=author&query=Rink%2C+T">T. Rink</a>, <a href="/search/hep-ex?searchtype=author&query=Garcia%2C+E+S">E. Sanchez Garcia</a>, <a href="/search/hep-ex?searchtype=author&query=Stauber%2C+J">J. Stauber</a>, <a href="/search/hep-ex?searchtype=author&query=Strecker%2C+H">H. Strecker</a>, <a href="/search/hep-ex?searchtype=author&query=Wink%2C+R">R. Wink</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2401.07684v2-abstract-short" style="display: inline;"> The CONUS experiment studies coherent elastic neutrino nucleus scattering in four 1 kg germanium spectrometers. Low ionization energy thresholds of 210 eV were achieved. The detectors were operated inside an optimized shield at the Brokdorf nuclear power plant which provided a reactor antineutrino flux of up to $2.3\cdot10^{13}$ cm$^{-2}$s$^{-1}$. In the final phase of data collection at this site… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.07684v2-abstract-full').style.display = 'inline'; document.getElementById('2401.07684v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2401.07684v2-abstract-full" style="display: none;"> The CONUS experiment studies coherent elastic neutrino nucleus scattering in four 1 kg germanium spectrometers. Low ionization energy thresholds of 210 eV were achieved. The detectors were operated inside an optimized shield at the Brokdorf nuclear power plant which provided a reactor antineutrino flux of up to $2.3\cdot10^{13}$ cm$^{-2}$s$^{-1}$. In the final phase of data collection at this site, the constraints on the neutrino interaction rate were improved by an order of magnitude as compared to the previous CONUS analysis. The new limit of less than 0.34 signal events kg$^{-1}$d$^{-1}$ is within a factor 2 of the rate predicted by the Standard Model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2401.07684v2-abstract-full').style.display = 'none'; document.getElementById('2401.07684v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 5 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 January, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2024. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">8 figures, 4 tables</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2308.12105">arXiv:2308.12105</a> <span> [<a href="https://arxiv.org/pdf/2308.12105">pdf</a>, <a href="https://arxiv.org/format/2308.12105">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-024-12470-w">10.1140/epjc/s10052-024-12470-w <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pulse shape discrimination for the CONUS experiment in the keV and sub-keV regime </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Bonet%2C+H">H. Bonet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=F%C3%BClber%2C+K">K. F眉lber</a>, <a href="/search/hep-ex?searchtype=author&query=Hakenm%C3%BCller%2C+J">J. Hakenm眉ller</a>, <a href="/search/hep-ex?searchtype=author&query=Hempfling%2C+J">J. Hempfling</a>, <a href="/search/hep-ex?searchtype=author&query=Henrichs%2C+J">J. Henrichs</a>, <a href="/search/hep-ex?searchtype=author&query=Heusser%2C+G">G. Heusser</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Maneschg%2C+W">W. Maneschg</a>, <a href="/search/hep-ex?searchtype=author&query=Rink%2C+T">T. Rink</a>, <a href="/search/hep-ex?searchtype=author&query=Garcia%2C+E+S">E. Sanchez Garcia</a>, <a href="/search/hep-ex?searchtype=author&query=Stauber%2C+J">J. Stauber</a>, <a href="/search/hep-ex?searchtype=author&query=Strecker%2C+H">H. Strecker</a>, <a href="/search/hep-ex?searchtype=author&query=Wink%2C+R">R. Wink</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2308.12105v2-abstract-short" style="display: inline;"> Point-contact p-type high-purity germanium detectors (PPC HPGe) are particularly suited for detection of sub-keV nuclear recoils from coherent elastic scattering of neutrinos or light dark matter particles. While these particles are expected to interact homogeneously in the entire detector volume, specific classes of external background radiation preferably deposit their energy close to the semi-a… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.12105v2-abstract-full').style.display = 'inline'; document.getElementById('2308.12105v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2308.12105v2-abstract-full" style="display: none;"> Point-contact p-type high-purity germanium detectors (PPC HPGe) are particularly suited for detection of sub-keV nuclear recoils from coherent elastic scattering of neutrinos or light dark matter particles. While these particles are expected to interact homogeneously in the entire detector volume, specific classes of external background radiation preferably deposit their energy close to the semi-active detector surface, in which diffusion processes dominate that subsequently lead to slower rising pulses compared to the ones from the fully active bulk volume. Dedicated studies of their shape are therefore highly beneficial for the understanding and the rejection of these unwanted events. This article reports about the development of a data-driven pulse shape discrimination (PSD) method for the four 1 kg size PPC HPGe detectors of the CONUS experiment in the keV and sub-keV regime down to 210 eV$_{\text{ee}}$. The impact of the electronic noise at such low energies is carefully examined. It is shown that for an acceptance of 90% of the faster signal-like pulses from the bulk volume, approx. 50% of the surface events can be rejected at the energy threshold and that their contribution is fully suppressed above 800 eV$_{\text{ee}}$. Applied to the CONUS background data, such a PSD rejection cut allows to achieve an overall (15-25)% reduction of the total background budget. The new method allows to improve the sensitivity of future CONUS analyses and to refine the corresponding background model in the sub-keV energy region. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2308.12105v2-abstract-full').style.display = 'none'; document.getElementById('2308.12105v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 February, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 84, 139 (2024) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.07664">arXiv:2210.07664</a> <span> [<a href="https://arxiv.org/pdf/2210.07664">pdf</a>, <a href="https://arxiv.org/format/2210.07664">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-022-05568-2">10.1038/s41586-022-05568-2 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Stereo neutrino spectrum of 235U fission rejects sterile neutrino hypothesis </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Chalil%2C+A">A. Chalil</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Atmani%2C+I+E">I. El Atmani</a>, <a href="/search/hep-ex?searchtype=author&query=Labit%2C+L">L. Labit</a>, <a href="/search/hep-ex?searchtype=author&query=Lhuillier%2C+J+L+A+L+D">J. Lamblin A. Letourneau D. Lhuillier</a>, <a href="/search/hep-ex?searchtype=author&query=Licciardi%2C+M">M. Licciardi</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Materna%2C+T">T. Materna</a>, <a href="/search/hep-ex?searchtype=author&query=Pessard%2C+H">H. Pessard</a>, <a href="/search/hep-ex?searchtype=author&query=R%C3%A9al%2C+J+-">J. -S. R茅al</a>, <a href="/search/hep-ex?searchtype=author&query=Ricol%2C+J+-">J. -S. Ricol</a>, <a href="/search/hep-ex?searchtype=author&query=Roca%2C+C">C. Roca</a>, <a href="/search/hep-ex?searchtype=author&query=Rogly%2C+R">R. Rogly</a>, <a href="/search/hep-ex?searchtype=author&query=Salagnac%2C+T">T. Salagnac</a>, <a href="/search/hep-ex?searchtype=author&query=Savu%2C+V">V. Savu</a>, <a href="/search/hep-ex?searchtype=author&query=Schoppmann%2C+S">S. Schoppmann</a>, <a href="/search/hep-ex?searchtype=author&query=Soldner%2C+T">T. Soldner</a>, <a href="/search/hep-ex?searchtype=author&query=Stutz%2C+A">A. Stutz</a>, <a href="/search/hep-ex?searchtype=author&query=Vialat%2C+M">M. Vialat</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2210.07664v3-abstract-short" style="display: inline;"> Anomalies in past neutrino measurements have led to the discovery that these particles have non-zero mass and oscillate between their three flavors when they propagate. In the 2010's, similar anomalies observed in the antineutrino spectra emitted by nuclear reactors have triggered the hypothesis of the existence of a supplementary neutrino state that would be sterile i.e. not interacting via the w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.07664v3-abstract-full').style.display = 'inline'; document.getElementById('2210.07664v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.07664v3-abstract-full" style="display: none;"> Anomalies in past neutrino measurements have led to the discovery that these particles have non-zero mass and oscillate between their three flavors when they propagate. In the 2010's, similar anomalies observed in the antineutrino spectra emitted by nuclear reactors have triggered the hypothesis of the existence of a supplementary neutrino state that would be sterile i.e. not interacting via the weak interaction. The STEREO experiment was designed to study this scientific case that would potentially extend the Standard Model of Particle Physics. Here we present a complete study based on our full set of data with significantly improved sensitivity. Installed at the ILL (Institut Laue Langevin) research reactor, STEREO has accurately measured the antineutrino energy spectrum associated to the fission of 235U. This measurement confirms the anomalies whereas, thanks to the segmentation of the STEREO detector and its very short mean distance to the core (10~m), the same data reject the hypothesis of a light sterile neutrino. Such a direct measurement of the antineutrino energy spectrum suggests instead that biases in the nuclear experimental data used for the predictions are at the origin of the anomalies. Our result supports the neutrino content of the Standard Model and establishes a new reference for the 235U antineutrino energy spectrum. We anticipate that this result will allow to progress towards finer tests of the fundamental properties of neutrinos but also to benchmark models and nuclear data of interest for reactor physics and for observations of astrophysical or geo-neutrinos. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.07664v3-abstract-full').style.display = 'none'; document.getElementById('2210.07664v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 April, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 October, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">34 pages, 13 figures. Final version submitted to Nature</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> STEREO neutrino spectrum of 235U fission rejects sterile neutrino hypothesis. Nature 613, 257 (2023) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2207.10918">arXiv:2207.10918</a> <span> [<a href="https://arxiv.org/pdf/2207.10918">pdf</a>, <a href="https://arxiv.org/format/2207.10918">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epja/s10050-023-00977-x">10.1140/epja/s10050-023-00977-x <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Improved FIFRELIN de-excitation model for neutrino applications </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Almazan%2C+H">H. Almazan</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Chalil%2C+A">A. Chalil</a>, <a href="/search/hep-ex?searchtype=author&query=Chebboubi%2C+A">A. Chebboubi</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Atmani%2C+I+E">I. El Atmani</a>, <a href="/search/hep-ex?searchtype=author&query=Labit%2C+L">L. Labit</a>, <a href="/search/hep-ex?searchtype=author&query=Lamblin%2C+J">J. Lamblin</a>, <a href="/search/hep-ex?searchtype=author&query=Letourneau%2C+A">A. Letourneau</a>, <a href="/search/hep-ex?searchtype=author&query=Lhuillier%2C+D">D. Lhuillier</a>, <a href="/search/hep-ex?searchtype=author&query=Licciardi%2C+M">M. Licciardi</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Litaize%2C+O">O. Litaize</a>, <a href="/search/hep-ex?searchtype=author&query=Materna%2C+T">T. Materna</a>, <a href="/search/hep-ex?searchtype=author&query=Pessard%2C+H">H. Pessard</a>, <a href="/search/hep-ex?searchtype=author&query=Real%2C+J+-">J. -S. Real</a>, <a href="/search/hep-ex?searchtype=author&query=Ricol%2C+J+-">J. -S. Ricol</a>, <a href="/search/hep-ex?searchtype=author&query=Roca%2C+C">C. Roca</a>, <a href="/search/hep-ex?searchtype=author&query=Rogly%2C+R">R. Rogly</a>, <a href="/search/hep-ex?searchtype=author&query=Salagnac%2C+T">T. Salagnac</a>, <a href="/search/hep-ex?searchtype=author&query=Savu%2C+V">V. Savu</a>, <a href="/search/hep-ex?searchtype=author&query=Schoppmann%2C+S">S. Schoppmann</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2207.10918v2-abstract-short" style="display: inline;"> The precise modeling of the de-excitation of Gd isotopes is of great interest for experimental studies of neutrinos using Gd-loaded organic liquid scintillators. The FIFRELIN code was recently used within the purposes of the STEREO experiment for the modeling of the Gd de-excitation after neutron capture in order to achieve a good control of the detection efficiency. In this work, we report on the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.10918v2-abstract-full').style.display = 'inline'; document.getElementById('2207.10918v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2207.10918v2-abstract-full" style="display: none;"> The precise modeling of the de-excitation of Gd isotopes is of great interest for experimental studies of neutrinos using Gd-loaded organic liquid scintillators. The FIFRELIN code was recently used within the purposes of the STEREO experiment for the modeling of the Gd de-excitation after neutron capture in order to achieve a good control of the detection efficiency. In this work, we report on the recent additions in the FIFRELIN de-excitation model with the purpose of enhancing further the de-excitation description. Experimental transition intensities from EGAF database are now included in the FIFRELIN cascades, in order to improve the description of the higher energy part of the spectrum. Furthermore, the angular correlations between 纬 rays are now implemented in FIFRELIN, to account for the relative anisotropies between them. In addition, conversion electrons are now treated more precisely in the whole spectrum range, while the subsequent emission of X rays is also accounted for. The impact of the aforementioned improvements in FIFRELIN is tested by simulating neutron captures in various positions inside the STEREO detector. A repository of up-to-date FIFRELIN simulations of the Gd isotopes is made available for the community, with the possibility of expanding for other isotopes which can be suitable for different applications. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2207.10918v2-abstract-full').style.display = 'none'; document.getElementById('2207.10918v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 July, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Corrected typos on author names on arXiv metadata</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.07361">arXiv:2203.07361</a> <span> [<a href="https://arxiv.org/pdf/2203.07361">pdf</a>, <a href="https://arxiv.org/format/2203.07361">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Astrophysical Phenomena">astro-ph.HE</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Coherent elastic neutrino-nucleus scattering: Terrestrial and astrophysical applications </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abdullah%2C+M">M. Abdullah</a>, <a href="/search/hep-ex?searchtype=author&query=Abele%2C+H">H. Abele</a>, <a href="/search/hep-ex?searchtype=author&query=Akimov%2C+D">D. Akimov</a>, <a href="/search/hep-ex?searchtype=author&query=Angloher%2C+G">G. Angloher</a>, <a href="/search/hep-ex?searchtype=author&query=Aristizabal-Sierra%2C+D">D. Aristizabal-Sierra</a>, <a href="/search/hep-ex?searchtype=author&query=Augier%2C+C">C. Augier</a>, <a href="/search/hep-ex?searchtype=author&query=Balantekin%2C+A+B">A. B. Balantekin</a>, <a href="/search/hep-ex?searchtype=author&query=Balogh%2C+L">L. Balogh</a>, <a href="/search/hep-ex?searchtype=author&query=Barbeau%2C+P+S">P. S. Barbeau</a>, <a href="/search/hep-ex?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/hep-ex?searchtype=author&query=Baxter%2C+A+L">A. L. Baxter</a>, <a href="/search/hep-ex?searchtype=author&query=Beaufort%2C+C">C. Beaufort</a>, <a href="/search/hep-ex?searchtype=author&query=Beaulieu%2C+G">G. Beaulieu</a>, <a href="/search/hep-ex?searchtype=author&query=Belov%2C+V">V. Belov</a>, <a href="/search/hep-ex?searchtype=author&query=Bento%2C+A">A. Bento</a>, <a href="/search/hep-ex?searchtype=author&query=Berge%2C+L">L. Berge</a>, <a href="/search/hep-ex?searchtype=author&query=Bernardi%2C+I+A">I. A. Bernardi</a>, <a href="/search/hep-ex?searchtype=author&query=Billard%2C+J">J. Billard</a>, <a href="/search/hep-ex?searchtype=author&query=Bolozdynya%2C+A">A. Bolozdynya</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Bres%2C+G">G. Bres</a>, <a href="/search/hep-ex?searchtype=author&query=Bret%2C+J+L">J-. L. Bret</a>, <a href="/search/hep-ex?searchtype=author&query=Broniatowski%2C+A">A. Broniatowski</a>, <a href="/search/hep-ex?searchtype=author&query=Brossard%2C+A">A. Brossard</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a> , et al. (250 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.07361v1-abstract-short" style="display: inline;"> Coherent elastic neutrino-nucleus scattering (CE$谓$NS) is a process in which neutrinos scatter on a nucleus which acts as a single particle. Though the total cross section is large by neutrino standards, CE$谓$NS has long proven difficult to detect, since the deposited energy into the nucleus is $\sim$ keV. In 2017, the COHERENT collaboration announced the detection of CE$谓$NS using a stopped-pion… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.07361v1-abstract-full').style.display = 'inline'; document.getElementById('2203.07361v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.07361v1-abstract-full" style="display: none;"> Coherent elastic neutrino-nucleus scattering (CE$谓$NS) is a process in which neutrinos scatter on a nucleus which acts as a single particle. Though the total cross section is large by neutrino standards, CE$谓$NS has long proven difficult to detect, since the deposited energy into the nucleus is $\sim$ keV. In 2017, the COHERENT collaboration announced the detection of CE$谓$NS using a stopped-pion source with CsI detectors, followed up the detection of CE$谓$NS using an Ar target. The detection of CE$谓$NS has spawned a flurry of activities in high-energy physics, inspiring new constraints on beyond the Standard Model (BSM) physics, and new experimental methods. The CE$谓$NS process has important implications for not only high-energy physics, but also astrophysics, nuclear physics, and beyond. This whitepaper discusses the scientific importance of CE$谓$NS, highlighting how present experiments such as COHERENT are informing theory, and also how future experiments will provide a wealth of information across the aforementioned fields of physics. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.07361v1-abstract-full').style.display = 'none'; document.getElementById('2203.07361v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 March, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">contribution to Snowmasss 2021. Contact authors: P. S. Barbeau, R. Strauss, L. E. Strigari</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.03754">arXiv:2202.03754</a> <span> [<a href="https://arxiv.org/pdf/2202.03754">pdf</a>, <a href="https://arxiv.org/format/2202.03754">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-022-10768-1">10.1140/epjc/s10052-022-10768-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Direct measurement of the ionization quenching factor of nuclear recoils in germanium in the keV energy range </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Bonet%2C+H">H. Bonet</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Hakenm%C3%BCller%2C+J">J. Hakenm眉ller</a>, <a href="/search/hep-ex?searchtype=author&query=Heusser%2C+G">G. Heusser</a>, <a href="/search/hep-ex?searchtype=author&query=Hugle%2C+T">T. Hugle</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Maneschg%2C+W">W. Maneschg</a>, <a href="/search/hep-ex?searchtype=author&query=Nolte%2C+R">R. Nolte</a>, <a href="/search/hep-ex?searchtype=author&query=Rink%2C+T">T. Rink</a>, <a href="/search/hep-ex?searchtype=author&query=Pirovano%2C+E">E. Pirovano</a>, <a href="/search/hep-ex?searchtype=author&query=Strecker%2C+H">H. Strecker</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2202.03754v2-abstract-short" style="display: inline;"> This article reports the measurement of the ionization quenching factor in germanium for nuclear recoil energies between 0.4 and 6.3 keV$_{nr}$. Precise knowledge of this factor in this energy range is relevant for coherent elastic neutrino-nucleus scattering and low mass dark matter searches with germanium-based detectors. Nuclear recoils were produced in a thin high-purity germanium target with… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.03754v2-abstract-full').style.display = 'inline'; document.getElementById('2202.03754v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.03754v2-abstract-full" style="display: none;"> This article reports the measurement of the ionization quenching factor in germanium for nuclear recoil energies between 0.4 and 6.3 keV$_{nr}$. Precise knowledge of this factor in this energy range is relevant for coherent elastic neutrino-nucleus scattering and low mass dark matter searches with germanium-based detectors. Nuclear recoils were produced in a thin high-purity germanium target with a very low energy threshold via irradiation with monoenergetic neutron beams. The energy dependence of the ionization quenching factor was directly measured via kinematically constrained coincidences with surrounding liquid scintillator based neutron detectors. The systematic uncertainties of the measurements are discussed in detail. With measured quenching factors between 0.16 and 0.23 in the [0.4, 6.3] keV$_{nr}$ energy range, the data are compatible with the Lindhard theory with a parameter $k$ of 0.162 $\pm$ 0.004 (stat+sys). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.03754v2-abstract-full').style.display = 'none'; document.getElementById('2202.03754v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 September, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 February, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 82, 815 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.12257">arXiv:2201.12257</a> <span> [<a href="https://arxiv.org/pdf/2201.12257">pdf</a>, <a href="https://arxiv.org/format/2201.12257">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-022-10722-1">10.1140/epjc/s10052-022-10722-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First upper limits on neutrino electromagnetic properties from the CONUS experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Bonet%2C+H">H. Bonet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=F%C3%BClber%2C+K">K. F眉lber</a>, <a href="/search/hep-ex?searchtype=author&query=Hakenm%C3%BCller%2C+J">J. Hakenm眉ller</a>, <a href="/search/hep-ex?searchtype=author&query=Hempfling%2C+J">J. Hempfling</a>, <a href="/search/hep-ex?searchtype=author&query=Heusser%2C+G">G. Heusser</a>, <a href="/search/hep-ex?searchtype=author&query=Hugle%2C+T">T. Hugle</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Maneschg%2C+W">W. Maneschg</a>, <a href="/search/hep-ex?searchtype=author&query=Rink%2C+T">T. Rink</a>, <a href="/search/hep-ex?searchtype=author&query=Strecker%2C+H">H. Strecker</a>, <a href="/search/hep-ex?searchtype=author&query=Wink%2C+R">R. Wink</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2201.12257v2-abstract-short" style="display: inline;"> We report first constraints on neutrino electromagnetic properties from neutrino-electron scattering using data obtained from the CONUS germanium detectors, i.e. an upper limit on the effective neutrino magnetic moment and an upper limit on the effective neutrino millicharge. The electron antineutrinos are emitted from the 3.9 GW$_\mathrm{th}$ reactor core of the Brokdorf nuclear power plant in Ge… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.12257v2-abstract-full').style.display = 'inline'; document.getElementById('2201.12257v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.12257v2-abstract-full" style="display: none;"> We report first constraints on neutrino electromagnetic properties from neutrino-electron scattering using data obtained from the CONUS germanium detectors, i.e. an upper limit on the effective neutrino magnetic moment and an upper limit on the effective neutrino millicharge. The electron antineutrinos are emitted from the 3.9 GW$_\mathrm{th}$ reactor core of the Brokdorf nuclear power plant in Germany. The CONUS low background detectors are positioned at 17.1 m distance from the reactor core center. The analyzed data set includes 689.1 kg$\cdot$d collected during reactor ON periods and 131.0 kg$\cdot$d collected during reactor OFF periods in the energy range of 2 to 8 keV$_{ee}$. With the current statistics, we are able to determine an upper limit on the effective neutrino magnetic moment $渭_谓< 7.5\cdot10^{-11}\,渭_B$ at 90% confidence level. From this first magnetic moment limit we can derive an upper bound on the neutrino millicharge of $\vert q_谓\vert < 3.3\cdot10^{-12}\,e_0$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.12257v2-abstract-full').style.display = 'none'; document.getElementById('2201.12257v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> The European Physical Journal C 82.9 (2022): 813 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.01519">arXiv:2111.01519</a> <span> [<a href="https://arxiv.org/pdf/2111.01519">pdf</a>, <a href="https://arxiv.org/format/2111.01519">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.128.061801">10.1103/PhysRevLett.128.061801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Searching for Hidden Neutrons with a Reactor Neutrino Experiment: Constraints from the STEREO Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Atmani%2C+I+E">I. El Atmani</a>, <a href="/search/hep-ex?searchtype=author&query=Labit%2C+L">L. Labit</a>, <a href="/search/hep-ex?searchtype=author&query=Lamblin%2C+J">J. Lamblin</a>, <a href="/search/hep-ex?searchtype=author&query=Letourneau%2C+A">A. Letourneau</a>, <a href="/search/hep-ex?searchtype=author&query=Lhuillier%2C+D">D. Lhuillier</a>, <a href="/search/hep-ex?searchtype=author&query=Licciardi%2C+M">M. Licciardi</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Materna%2C+T">T. Materna</a>, <a href="/search/hep-ex?searchtype=author&query=M%C3%A9plan%2C+O">O. M茅plan</a>, <a href="/search/hep-ex?searchtype=author&query=Pessard%2C+H">H. Pessard</a>, <a href="/search/hep-ex?searchtype=author&query=Pignol%2C+G">G. Pignol</a>, <a href="/search/hep-ex?searchtype=author&query=R%C3%A9al%2C+J+-">J. -S. R茅al</a>, <a href="/search/hep-ex?searchtype=author&query=Ricol%2C+J+-">J. -S. Ricol</a>, <a href="/search/hep-ex?searchtype=author&query=Roca%2C+C">C. Roca</a>, <a href="/search/hep-ex?searchtype=author&query=Rogly%2C+R">R. Rogly</a>, <a href="/search/hep-ex?searchtype=author&query=Salagnac%2C+T">T. Salagnac</a>, <a href="/search/hep-ex?searchtype=author&query=Sarrazin%2C+M">M. Sarrazin</a>, <a href="/search/hep-ex?searchtype=author&query=Savu%2C+V">V. Savu</a>, <a href="/search/hep-ex?searchtype=author&query=Schoppmann%2C+S">S. Schoppmann</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2111.01519v2-abstract-short" style="display: inline;"> Different extensions of the standard model of particle physics, such as braneworld or mirror matter models, predict the existence of a neutron sterile state, possibly as a dark matter candidate. This Letter reports a new experimental constraint on the probability $p$ for neutron conversion into a hidden neutron, set by the STEREO experiment at the high flux reactor of the Institut Laue-Langevin. T… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.01519v2-abstract-full').style.display = 'inline'; document.getElementById('2111.01519v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.01519v2-abstract-full" style="display: none;"> Different extensions of the standard model of particle physics, such as braneworld or mirror matter models, predict the existence of a neutron sterile state, possibly as a dark matter candidate. This Letter reports a new experimental constraint on the probability $p$ for neutron conversion into a hidden neutron, set by the STEREO experiment at the high flux reactor of the Institut Laue-Langevin. The limit is $p<3.1\times 10^{-11}$ at $95 \%$ C.L. improving the previous limit by a factor 13. This result demonstrates that short-baseline neutrino experiments can be used as competitive passing-through-walls neutron experiments to search for hidden neutrons. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.01519v2-abstract-full').style.display = 'none'; document.getElementById('2111.01519v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 2 November, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 128, 061801 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2110.02174">arXiv:2110.02174</a> <span> [<a href="https://arxiv.org/pdf/2110.02174">pdf</a>, <a href="https://arxiv.org/format/2110.02174">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP05(2022)085">10.1007/JHEP05(2022)085 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Novel constraints on neutrino physics beyond the standard model from the CONUS experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=CONUS+Collaboration"> CONUS Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Bonet%2C+H">H. Bonet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=F%C3%BClber%2C+K">K. F眉lber</a>, <a href="/search/hep-ex?searchtype=author&query=Hakenm%C3%BCller%2C+J">J. Hakenm眉ller</a>, <a href="/search/hep-ex?searchtype=author&query=Heusser%2C+G">G. Heusser</a>, <a href="/search/hep-ex?searchtype=author&query=Hugle%2C+T">T. Hugle</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Maneschg%2C+W">W. Maneschg</a>, <a href="/search/hep-ex?searchtype=author&query=Rink%2C+T">T. Rink</a>, <a href="/search/hep-ex?searchtype=author&query=Strecker%2C+H">H. Strecker</a>, <a href="/search/hep-ex?searchtype=author&query=Wink%2C+R">R. Wink</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2110.02174v2-abstract-short" style="display: inline;"> The measurements of coherent elastic neutrino-nucleus scattering (CE$谓$NS) experiments have opened up the possibility to constrain neutrino physics beyond the standard model of elementary particle physics. Furthermore, by considering neutrino-electron scattering in the keV-energy region, it is possible to set additional limits on new physics processes. Here, we present constraints that are derived… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.02174v2-abstract-full').style.display = 'inline'; document.getElementById('2110.02174v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2110.02174v2-abstract-full" style="display: none;"> The measurements of coherent elastic neutrino-nucleus scattering (CE$谓$NS) experiments have opened up the possibility to constrain neutrino physics beyond the standard model of elementary particle physics. Furthermore, by considering neutrino-electron scattering in the keV-energy region, it is possible to set additional limits on new physics processes. Here, we present constraints that are derived from CONUS germanium data on beyond the standard model (BSM) processes like tensor and vector non-standard interactions (NSIs) in the neutrino-quark sector, as well as light vector and scalar mediators. Thanks to the realized low background levels in the CONUS experiment at ionization energies below 1 keV, we are able to set the world's best limits on tensor NSIs from CE$谓$NS and constrain the scale of corresponding new physics to lie above 360 GeV. For vector NSIs, the derived limits strongly depend on the assumed ionization quenching factor within the detector material, since small quenching factors largely suppress potential signals for both, the expected standard model CE$谓$NS process and the vector NSIs. Furthermore, competitive limits on scalar and vector mediators are obtained from the CE$谓$NS channel at reactor-site which allow to probe coupling constants as low as $5\cdot10^{-5}$ of low mediator masses, assuming the currently favored quenching factor regime. The consideration of neutrino-electron scatterings allows to set even stronger constraints for mediator masses below $\sim1$ MeV and $\sim 10$ MeV for scalar and vector mediators, respectively. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2110.02174v2-abstract-full').style.display = 'none'; document.getElementById('2110.02174v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 October, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">35 pages, 6 figures, 3 tables; v2: Figure 2 and further references added, other CE$谓$NS limits included in result plots, matches published version in JHEP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 05 (2022) 085 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2107.03371">arXiv:2107.03371</a> <span> [<a href="https://arxiv.org/pdf/2107.03371">pdf</a>, <a href="https://arxiv.org/format/2107.03371">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.128.081802">10.1103/PhysRevLett.128.081802 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Joint Measurement of the $^{235}$U Antineutrino Spectrum by Prospect and Stereo </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Andriamirado%2C+M">M. Andriamirado</a>, <a href="/search/hep-ex?searchtype=author&query=Balantekin%2C+A+B">A. B. Balantekin</a>, <a href="/search/hep-ex?searchtype=author&query=Band%2C+H+R">H. R. Band</a>, <a href="/search/hep-ex?searchtype=author&query=Bass%2C+C+D">C. D. Bass</a>, <a href="/search/hep-ex?searchtype=author&query=Bergeron%2C+D+E">D. E. Bergeron</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Bowden%2C+N+S">N. S. Bowden</a>, <a href="/search/hep-ex?searchtype=author&query=Bryan%2C+C+D">C. D. Bryan</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Classen%2C+T">T. Classen</a>, <a href="/search/hep-ex?searchtype=author&query=Conant%2C+A+J">A. J. Conant</a>, <a href="/search/hep-ex?searchtype=author&query=Deichert%2C+G">G. Deichert</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Delgado%2C+A">A. Delgado</a>, <a href="/search/hep-ex?searchtype=author&query=Diwan%2C+M+V">M. V. Diwan</a>, <a href="/search/hep-ex?searchtype=author&query=Dolinski%2C+M+J">M. J. Dolinski</a>, <a href="/search/hep-ex?searchtype=author&query=Atmani%2C+I+E">I. El Atmani</a>, <a href="/search/hep-ex?searchtype=author&query=Erickson%2C+A">A. Erickson</a>, <a href="/search/hep-ex?searchtype=author&query=Foust%2C+B+T">B. T. Foust</a>, <a href="/search/hep-ex?searchtype=author&query=Gaison%2C+J+K">J. K. Gaison</a>, <a href="/search/hep-ex?searchtype=author&query=Galindo-Uribarri%2C+A">A. Galindo-Uribarri</a>, <a href="/search/hep-ex?searchtype=author&query=Gilbert%2C+C+E">C. E. Gilbert</a> , et al. (60 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2107.03371v1-abstract-short" style="display: inline;"> The PROSPECT and STEREO collaborations present a combined measurement of the pure $^{235}$U antineutrino spectrum, without site specific corrections or detector-dependent effects. The spectral measurements of the two highest precision experiments at research reactors are found to be compatible with $蠂^2/\mathrm{ndf} = 24.1/21$, allowing a joint unfolding of the prompt energy measurements into anti… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.03371v1-abstract-full').style.display = 'inline'; document.getElementById('2107.03371v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2107.03371v1-abstract-full" style="display: none;"> The PROSPECT and STEREO collaborations present a combined measurement of the pure $^{235}$U antineutrino spectrum, without site specific corrections or detector-dependent effects. The spectral measurements of the two highest precision experiments at research reactors are found to be compatible with $蠂^2/\mathrm{ndf} = 24.1/21$, allowing a joint unfolding of the prompt energy measurements into antineutrino energy. This $\bar谓_e$ energy spectrum is provided to the community, and an excess of events relative to the Huber model is found in the 5-6 MeV region. When a Gaussian bump is fitted to the excess, the data-model $蠂^2$ value is improved, corresponding to a $2.4蟽$ significance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2107.03371v1-abstract-full').style.display = 'none'; document.getElementById('2107.03371v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2011.00210">arXiv:2011.00210</a> <span> [<a href="https://arxiv.org/pdf/2011.00210">pdf</a>, <a href="https://arxiv.org/format/2011.00210">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.126.041804">10.1103/PhysRevLett.126.041804 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Constraints on elastic neutrino nucleus scattering in the fully coherent regime from the CONUS experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Bonet%2C+H">H. Bonet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=F%C3%BClber%2C+K">K. F眉lber</a>, <a href="/search/hep-ex?searchtype=author&query=Hakenm%C3%BCller%2C+J">J. Hakenm眉ller</a>, <a href="/search/hep-ex?searchtype=author&query=Heusser%2C+G">G. Heusser</a>, <a href="/search/hep-ex?searchtype=author&query=Hugle%2C+T">T. Hugle</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Maneschg%2C+W">W. Maneschg</a>, <a href="/search/hep-ex?searchtype=author&query=Rink%2C+T">T. Rink</a>, <a href="/search/hep-ex?searchtype=author&query=Strecker%2C+H">H. Strecker</a>, <a href="/search/hep-ex?searchtype=author&query=Wink%2C+R">R. Wink</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2011.00210v2-abstract-short" style="display: inline;"> We report the best limit on coherent elastic scattering of electron antineutrinos emitted from a nuclear reactor off germanium nuclei. The measurement was performed with the CONUS detectors positioned at 17.1m from the 3.9GWth reactor core of the nuclear power plant in Brokdorf, Germany. The antineutrino energies of less than 10 MeV assure interactions in the fully coherent regime. The analyzed da… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.00210v2-abstract-full').style.display = 'inline'; document.getElementById('2011.00210v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2011.00210v2-abstract-full" style="display: none;"> We report the best limit on coherent elastic scattering of electron antineutrinos emitted from a nuclear reactor off germanium nuclei. The measurement was performed with the CONUS detectors positioned at 17.1m from the 3.9GWth reactor core of the nuclear power plant in Brokdorf, Germany. The antineutrino energies of less than 10 MeV assure interactions in the fully coherent regime. The analyzed dataset includes 248.7 kgd with the reactor turned on and background data of 58.8 kgd with the reactor off. With a quenching parameter of k = 0.18 for germanium, we determined an upper limit on the number of neutrino events of 85 in the region of interest at 90% confidence level. This new CONUS dataset disfavors quenching parameters above k = 0.27, under the assumption of standard-model-like coherent scattering of the reactor antineutrinos. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2011.00210v2-abstract-full').style.display = 'none'; document.getElementById('2011.00210v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 8 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 126, 041804 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2010.01876">arXiv:2010.01876</a> <span> [<a href="https://arxiv.org/pdf/2010.01876">pdf</a>, <a href="https://arxiv.org/format/2010.01876">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1361-6471/abd37a">10.1088/1361-6471/abd37a <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First antineutrino energy spectrum from $^{235}$U fissions with the STEREO detector at ILL </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=STEREO+collaboration"> STEREO collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Atmani%2C+I+E">I. El Atmani</a>, <a href="/search/hep-ex?searchtype=author&query=Labit%2C+L">L. Labit</a>, <a href="/search/hep-ex?searchtype=author&query=Lamblin%2C+J">J. Lamblin</a>, <a href="/search/hep-ex?searchtype=author&query=Letourneau%2C+A">A. Letourneau</a>, <a href="/search/hep-ex?searchtype=author&query=Lhuillier%2C+D">D. Lhuillier</a>, <a href="/search/hep-ex?searchtype=author&query=Licciardi%2C+M">M. Licciardi</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Materna%2C+T">T. Materna</a>, <a href="/search/hep-ex?searchtype=author&query=Pessard%2C+H">H. Pessard</a>, <a href="/search/hep-ex?searchtype=author&query=R%C3%A9al%2C+J+-">J. -S. R茅al</a>, <a href="/search/hep-ex?searchtype=author&query=Ricol%2C+J+-">J. -S. Ricol</a>, <a href="/search/hep-ex?searchtype=author&query=Roca%2C+C">C. Roca</a>, <a href="/search/hep-ex?searchtype=author&query=Rogly%2C+R">R. Rogly</a>, <a href="/search/hep-ex?searchtype=author&query=Salagnac%2C+T">T. Salagnac</a>, <a href="/search/hep-ex?searchtype=author&query=Savu%2C+V">V. Savu</a>, <a href="/search/hep-ex?searchtype=author&query=Schoppmann%2C+S">S. Schoppmann</a>, <a href="/search/hep-ex?searchtype=author&query=Sergeyeva%2C+V">V. Sergeyeva</a>, <a href="/search/hep-ex?searchtype=author&query=Soldner%2C+T">T. Soldner</a> , et al. (2 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2010.01876v2-abstract-short" style="display: inline;"> This article reports the measurement of the $^{235}$U-induced antineutrino spectrum shape by the STEREO experiment. 43'000 antineutrinos have been detected at about 10 m from the highly enriched core of the ILL reactor during 118 full days equivalent at nominal power. The measured inverse beta decay spectrum is unfolded to provide a pure $^{235}$U spectrum in antineutrino energy. A careful study o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.01876v2-abstract-full').style.display = 'inline'; document.getElementById('2010.01876v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2010.01876v2-abstract-full" style="display: none;"> This article reports the measurement of the $^{235}$U-induced antineutrino spectrum shape by the STEREO experiment. 43'000 antineutrinos have been detected at about 10 m from the highly enriched core of the ILL reactor during 118 full days equivalent at nominal power. The measured inverse beta decay spectrum is unfolded to provide a pure $^{235}$U spectrum in antineutrino energy. A careful study of the unfolding procedure, including a cross-validation by an independent framework, has shown that no major biases are introduced by the method. A significant local distortion is found with respect to predictions around $E_谓\simeq 5.3$ MeV. A gaussian fit of this local excess leads to an amplitude of $A = 12.1 \pm 3.4\%$ (3.5$蟽$). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2010.01876v2-abstract-full').style.display = 'none'; document.getElementById('2010.01876v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 4 June, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 October, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">This is the Accepted Manuscript version of an article accepted for publication in J. Phys. G: Nucl. Part. Phys.. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1361-6471/abd37a. 34 pages, 14 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Phys. G: Nucl. Part. Phys. 48 075107 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2009.05515">arXiv:2009.05515</a> <span> [<a href="https://arxiv.org/pdf/2009.05515">pdf</a>, <a href="https://arxiv.org/format/2009.05515">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-021-09459-0">10.1140/epjc/s10052-021-09459-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for Signatures of Sterile Neutrinos with Double Chooz </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=The+Double+Chooz+Collaboration"> The Double Chooz Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abrah%C3%A3o%2C+T">T. Abrah茫o</a>, <a href="/search/hep-ex?searchtype=author&query=Almazan%2C+H">H. Almazan</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Appel%2C+S">S. Appel</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Brugi%C3%A8re%2C+T">T. Brugi猫re</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Corpace%2C+O">O. Corpace</a>, <a href="/search/hep-ex?searchtype=author&query=Dawson%2C+J+V">J. V. Dawson</a>, <a href="/search/hep-ex?searchtype=author&query=Djurcic%2C+Z">Z. Djurcic</a>, <a href="/search/hep-ex?searchtype=author&query=Etenko%2C+A">A. Etenko</a>, <a href="/search/hep-ex?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/hep-ex?searchtype=author&query=Gil-Botella%2C+I">I. Gil-Botella</a>, <a href="/search/hep-ex?searchtype=author&query=Givaudan%2C+A">A. Givaudan</a>, <a href="/search/hep-ex?searchtype=author&query=Gomez%2C+H">H. Gomez</a> , et al. (70 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2009.05515v3-abstract-short" style="display: inline;"> We present a search for signatures of neutrino mixing of electron anti-neutrinos with additional hypothetical sterile neutrino flavors using the Double Chooz experiment. The search is based on data from 5 years of operation of Double Chooz, including 2 years in the two-detector configuration. The analysis is based on a profile likelihood, i.e.\ comparing the data to the model prediction of disappe… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.05515v3-abstract-full').style.display = 'inline'; document.getElementById('2009.05515v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.05515v3-abstract-full" style="display: none;"> We present a search for signatures of neutrino mixing of electron anti-neutrinos with additional hypothetical sterile neutrino flavors using the Double Chooz experiment. The search is based on data from 5 years of operation of Double Chooz, including 2 years in the two-detector configuration. The analysis is based on a profile likelihood, i.e.\ comparing the data to the model prediction of disappearance in a data-to-data comparison of the two respective detectors. The analysis is optimized for a model of three active and one sterile neutrino. It is sensitive in the typical mass range $5 \cdot 10^{-3} $ eV$^2 \lesssim 螖m^2_{41} \lesssim 3\cdot 10^{-1} $ eV$^2$ for mixing angles down to $\sin^2 2胃_{14} \gtrsim 0.02$. No significant disappearance additionally to the conventional disappearance related to $胃_{13} $ is observed and correspondingly exclusion bounds on the sterile mixing parameter $胃_{14} $ as function of $ 螖m^2_{41} $ are obtained. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.05515v3-abstract-full').style.display = 'none'; document.getElementById('2009.05515v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 19 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">accepted for publication by EPJC</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 62F03 (Primary); 62P35; 65C60 (Secondary) </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 81, 775 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.13431">arXiv:2007.13431</a> <span> [<a href="https://arxiv.org/pdf/2007.13431">pdf</a>, <a href="https://arxiv.org/format/2007.13431">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP01(2021)190">10.1007/JHEP01(2021)190 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Reactor Rate Modulation oscillation analysis with two detectors in Double Chooz </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Double+Chooz+Collaboration"> Double Chooz Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abrah%C3%A3o%2C+T">T. Abrah茫o</a>, <a href="/search/hep-ex?searchtype=author&query=Almazan%2C+H">H. Almazan</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Appel%2C+S">S. Appel</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Brugi%C3%A8re%2C+T">T. Brugi猫re</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Dawson%2C+J+V">J. V. Dawson</a>, <a href="/search/hep-ex?searchtype=author&query=Djurcic%2C+Z">Z. Djurcic</a>, <a href="/search/hep-ex?searchtype=author&query=Etenko%2C+A">A. Etenko</a>, <a href="/search/hep-ex?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/hep-ex?searchtype=author&query=Gil-Botella%2C+I">I. Gil-Botella</a>, <a href="/search/hep-ex?searchtype=author&query=Gonzalez%2C+L+F+G">L. F. G. Gonzalez</a>, <a href="/search/hep-ex?searchtype=author&query=Goodman%2C+M+C">M. C. Goodman</a>, <a href="/search/hep-ex?searchtype=author&query=Hara%2C+T">T. Hara</a>, <a href="/search/hep-ex?searchtype=author&query=Hellwig%2C+D">D. Hellwig</a> , et al. (62 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2007.13431v2-abstract-short" style="display: inline;"> A $胃_{13}$ oscillation analysis based on the observed antineutrino rates at the Double Chooz far and near detectors for different reactor power conditions is presented. This approach provides a so far unique simultaneous determination of $胃_{13}$ and the total background rates without relying on any assumptions on the specific background contributions. The analysis comprises 865 days of data colle… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.13431v2-abstract-full').style.display = 'inline'; document.getElementById('2007.13431v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.13431v2-abstract-full" style="display: none;"> A $胃_{13}$ oscillation analysis based on the observed antineutrino rates at the Double Chooz far and near detectors for different reactor power conditions is presented. This approach provides a so far unique simultaneous determination of $胃_{13}$ and the total background rates without relying on any assumptions on the specific background contributions. The analysis comprises 865 days of data collected in both detectors with at least one reactor in operation. The oscillation results are enhanced by the use of 24.06 days (12.74 days) of reactor-off data in the far (near) detector. The analysis considers the \nue interactions up to a visible energy of 8.5 MeV, using the events at higher energies to build a cosmogenic background model considering fast-neutrons interactions and $^{9}$Li decays. The background-model-independent determination of the mixing angle yields sin$^2(2胃_{13})=0.094\pm0.017$, being the best-fit total background rates fully consistent with the cosmogenic background model. A second oscillation analysis is also performed constraining the total background rates to the cosmogenic background estimates. While the central value is not significantly modified due to the consistency between the reactor-off data and the background estimates, the addition of the background model reduces the uncertainty on $胃_{13}$ to 0.015. Along with the oscillation results, the normalization of the anti-neutrino rate is measured with a precision of 0.86\%, reducing the 1.43\% uncertainty associated to the expectation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.13431v2-abstract-full').style.display = 'none'; document.getElementById('2007.13431v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 December, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 July, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 01 (2021) 190 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2006.13147">arXiv:2006.13147</a> <span> [<a href="https://arxiv.org/pdf/2006.13147">pdf</a>, <a href="https://arxiv.org/format/2006.13147">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Note on arXiv:2005.05301, 'Preparation of the Neutrino-4 experiment on search for sterile neutrino and the obtained results of measurements' </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Andriamirado%2C+M">M. Andriamirado</a>, <a href="/search/hep-ex?searchtype=author&query=Balantekin%2C+A+B">A. B. Balantekin</a>, <a href="/search/hep-ex?searchtype=author&query=Band%2C+H+R">H. R. Band</a>, <a href="/search/hep-ex?searchtype=author&query=Bass%2C+C+D">C. D. Bass</a>, <a href="/search/hep-ex?searchtype=author&query=Bergeron%2C+D+E">D. E. Bergeron</a>, <a href="/search/hep-ex?searchtype=author&query=Berish%2C+D">D. Berish</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Bowden%2C+N+S">N. S. Bowden</a>, <a href="/search/hep-ex?searchtype=author&query=Brodsky%2C+J+P">J. P. Brodsky</a>, <a href="/search/hep-ex?searchtype=author&query=Bryan%2C+C+D">C. D. Bryan</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Classen%2C+T">T. Classen</a>, <a href="/search/hep-ex?searchtype=author&query=Conant%2C+A+J">A. J. Conant</a>, <a href="/search/hep-ex?searchtype=author&query=Deichert%2C+G">G. Deichert</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Diwan%2C+M+V">M. V. Diwan</a>, <a href="/search/hep-ex?searchtype=author&query=Dolinski%2C+M+J">M. J. Dolinski</a>, <a href="/search/hep-ex?searchtype=author&query=Atmani%2C+I+E">I. El Atmani</a>, <a href="/search/hep-ex?searchtype=author&query=Erickson%2C+A">A. Erickson</a>, <a href="/search/hep-ex?searchtype=author&query=Foust%2C+B+T">B. T. Foust</a>, <a href="/search/hep-ex?searchtype=author&query=Gaison%2C+J+K">J. K. Gaison</a>, <a href="/search/hep-ex?searchtype=author&query=Galindo-Uribarri%2C+A">A. Galindo-Uribarri</a>, <a href="/search/hep-ex?searchtype=author&query=Gilbert%2C+C+E">C. E. Gilbert</a>, <a href="/search/hep-ex?searchtype=author&query=Hackett%2C+B+T">B. T. Hackett</a> , et al. (57 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2006.13147v1-abstract-short" style="display: inline;"> We comment on the claimed observation [arXiv:arXiv:2005.05301] of sterile neutrino oscillations by the Neutrino-4 collaboration. Such a claim, which requires the existence of a new fundamental particle, demands a level of rigor commensurate with its impact. The burden lies with the Neutrino-4 collaboration to provide the information necessary to prove the validity of their claim to the community.… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.13147v1-abstract-full').style.display = 'inline'; document.getElementById('2006.13147v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.13147v1-abstract-full" style="display: none;"> We comment on the claimed observation [arXiv:arXiv:2005.05301] of sterile neutrino oscillations by the Neutrino-4 collaboration. Such a claim, which requires the existence of a new fundamental particle, demands a level of rigor commensurate with its impact. The burden lies with the Neutrino-4 collaboration to provide the information necessary to prove the validity of their claim to the community. In this note, we describe aspects of both the data and analysis method that might lead to an oscillation signature arising from a null experiment and describe additional information needed from the Neutrino-4 collaboration to support the oscillation claim. Additionally, as opposed to the assertion made by the Neutrino-4 collaboration, we also show that the method of 'coherent summation' using the $L/E$ parameter produces similar results to the methods used by the PROSPECT and the STEREO collaborations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.13147v1-abstract-full').style.display = 'none'; document.getElementById('2006.13147v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 23 June, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2004.04075">arXiv:2004.04075</a> <span> [<a href="https://arxiv.org/pdf/2004.04075">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.125.201801">10.1103/PhysRevLett.125.201801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Accurate Measurement of the Electron Antineutrino Yield of U-235 Fissions from the STEREO Experiment with 119 Days of Reactor-On Data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=STEREO+Collaboration"> STEREO Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Atmani%2C+I+E">I. El Atmani</a>, <a href="/search/hep-ex?searchtype=author&query=Haser%2C+J">J. Haser</a>, <a href="/search/hep-ex?searchtype=author&query=Labit%2C+L">L. Labit</a>, <a href="/search/hep-ex?searchtype=author&query=Lamblin%2C+J">J. Lamblin</a>, <a href="/search/hep-ex?searchtype=author&query=Letourneau%2C+A">A. Letourneau</a>, <a href="/search/hep-ex?searchtype=author&query=Lhuillier%2C+D">D. Lhuillier</a>, <a href="/search/hep-ex?searchtype=author&query=Licciardi%2C+M">M. Licciardi</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Materna%2C+T">T. Materna</a>, <a href="/search/hep-ex?searchtype=author&query=Minotti%2C+A">A. Minotti</a>, <a href="/search/hep-ex?searchtype=author&query=Onillon%2C+A">A. Onillon</a>, <a href="/search/hep-ex?searchtype=author&query=Pessard%2C+H">H. Pessard</a>, <a href="/search/hep-ex?searchtype=author&query=R%C3%A9al%2C+J+-">J. -S. R茅al</a>, <a href="/search/hep-ex?searchtype=author&query=Roca%2C+C">C. Roca</a>, <a href="/search/hep-ex?searchtype=author&query=Rogly%2C+R">R. Rogly</a>, <a href="/search/hep-ex?searchtype=author&query=Salagnac%2C+T">T. Salagnac</a>, <a href="/search/hep-ex?searchtype=author&query=Savu%2C+V">V. Savu</a>, <a href="/search/hep-ex?searchtype=author&query=Schoppmann%2C+S">S. Schoppmann</a> , et al. (4 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2004.04075v2-abstract-short" style="display: inline;"> We report a measurement of the antineutrino rate from the fission of U-235 with the STEREO detector using 119 days of reactor turned on. In our analysis, we perform several detailed corrections and achieve the most precise single measurement at reactors with highly enriched U-235 fuel. We measure an IBD cross section per fission of $蟽_f$ = (6.34 $\pm$ 0.06 [stat] $\pm$ 0.15 [sys] $\pm$ 0.15 [model… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.04075v2-abstract-full').style.display = 'inline'; document.getElementById('2004.04075v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2004.04075v2-abstract-full" style="display: none;"> We report a measurement of the antineutrino rate from the fission of U-235 with the STEREO detector using 119 days of reactor turned on. In our analysis, we perform several detailed corrections and achieve the most precise single measurement at reactors with highly enriched U-235 fuel. We measure an IBD cross section per fission of $蟽_f$ = (6.34 $\pm$ 0.06 [stat] $\pm$ 0.15 [sys] $\pm$ 0.15 [model]) $\times$ 10${}^{-43}$ cm${}^{2}$/fission and observe a rate deficit of (5.2 $\pm$ 0.8 [stat] $\pm$ 2.3 [sys] $\pm$ 2.3 [model])% compared to the model, consistent with the deficit of the world average. Testing U-235 as the sole source of the deficit, we find a tension between the results of lowly and highly enriched U-235 fuel of 2.1 standard deviations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2004.04075v2-abstract-full').style.display = 'none'; document.getElementById('2004.04075v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 November, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2020. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 1 figure</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 125, 201801 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1912.06582">arXiv:1912.06582</a> <span> [<a href="https://arxiv.org/pdf/1912.06582">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.102.052002">10.1103/PhysRevD.102.052002 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Improved Sterile Neutrino Constraints from the STEREO Experiment with 179 Days of Reactor-On Data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=STEREO+Collaboration"> STEREO Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Atmani%2C+I+E">I. El Atmani</a>, <a href="/search/hep-ex?searchtype=author&query=Haser%2C+J">J. Haser</a>, <a href="/search/hep-ex?searchtype=author&query=Kandzia%2C+F">F. Kandzia</a>, <a href="/search/hep-ex?searchtype=author&query=Kox%2C+S">S. Kox</a>, <a href="/search/hep-ex?searchtype=author&query=Labit%2C+L">L. Labit</a>, <a href="/search/hep-ex?searchtype=author&query=Lamblin%2C+J">J. Lamblin</a>, <a href="/search/hep-ex?searchtype=author&query=Letourneau%2C+A">A. Letourneau</a>, <a href="/search/hep-ex?searchtype=author&query=Lhuillier%2C+D">D. Lhuillier</a>, <a href="/search/hep-ex?searchtype=author&query=Licciardi%2C+M">M. Licciardi</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Materna%2C+T">T. Materna</a>, <a href="/search/hep-ex?searchtype=author&query=Minotti%2C+A">A. Minotti</a>, <a href="/search/hep-ex?searchtype=author&query=Pessard%2C+H">H. Pessard</a>, <a href="/search/hep-ex?searchtype=author&query=R%C3%A9al%2C+J+-">J. -S. R茅al</a>, <a href="/search/hep-ex?searchtype=author&query=Roca%2C+C">C. Roca</a>, <a href="/search/hep-ex?searchtype=author&query=Rogly%2C+R">R. Rogly</a>, <a href="/search/hep-ex?searchtype=author&query=Salagnac%2C+T">T. Salagnac</a>, <a href="/search/hep-ex?searchtype=author&query=Savu%2C+V">V. Savu</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1912.06582v2-abstract-short" style="display: inline;"> The STEREO experiment is a very short baseline reactor antineutrino experiment. It is designed to test the hypothesis of light sterile neutrinos being the cause of a deficit of the observed antineutrino interaction rate at short baselines with respect to the predicted rate, known as the reactor antineutrino anomaly. The STEREO experiment measures the antineutrino energy spectrum in six identical d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.06582v2-abstract-full').style.display = 'inline'; document.getElementById('1912.06582v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1912.06582v2-abstract-full" style="display: none;"> The STEREO experiment is a very short baseline reactor antineutrino experiment. It is designed to test the hypothesis of light sterile neutrinos being the cause of a deficit of the observed antineutrino interaction rate at short baselines with respect to the predicted rate, known as the reactor antineutrino anomaly. The STEREO experiment measures the antineutrino energy spectrum in six identical detector cells covering baselines between 9 and 11 m from the compact core of the ILL research reactor. In this article, results from 179 days of reactor turned on and 235 days of reactor turned off are reported at a high degree of detail. The current results include improvements in the modelling of detector optical properties and the gamma-cascade after neutron captures by gadolinium, the treatment of backgrounds, and the statistical method of the oscillation analysis. Using a direct comparison between antineutrino spectra of all cells, largely independent of any flux prediction, we find the data compatible with the null oscillation hypothesis. The best-fit point of the reactor antineutrino anomaly is rejected at more than 99.9% C.L. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1912.06582v2-abstract-full').style.display = 'none'; document.getElementById('1912.06582v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 December, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">31 pages, 35 figures, for supplemental data see http://doi.org/10.17182/hepdata.92323</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 102, 052002 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1908.02859">arXiv:1908.02859</a> <span> [<a href="https://arxiv.org/pdf/1908.02859">pdf</a>, <a href="https://arxiv.org/format/1908.02859">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s42005-021-00763-5">10.1038/s42005-021-00763-5 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Neutrino Physics with an Opaque Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Abusleme%2C+A">A. Abusleme</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+d">J. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bongrand%2C+M">M. Bongrand</a>, <a href="/search/hep-ex?searchtype=author&query=Bourgeois%2C+C">C. Bourgeois</a>, <a href="/search/hep-ex?searchtype=author&query=Breton%2C+D">D. Breton</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busto%2C+J">J. Busto</a>, <a href="/search/hep-ex?searchtype=author&query=Calvo%2C+E">E. Calvo</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chen%2C+M">M. Chen</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Corso%2C+F+D">F. Dal Corso</a>, <a href="/search/hep-ex?searchtype=author&query=De+Conto%2C+G">G. De Conto</a>, <a href="/search/hep-ex?searchtype=author&query=Dusini%2C+S">S. Dusini</a>, <a href="/search/hep-ex?searchtype=author&query=Fiorentini%2C+G">G. Fiorentini</a>, <a href="/search/hep-ex?searchtype=author&query=Martins%2C+C+F">C. Frigerio Martins</a>, <a href="/search/hep-ex?searchtype=author&query=Givaudan%2C+A">A. Givaudan</a>, <a href="/search/hep-ex?searchtype=author&query=Govoni%2C+P">P. Govoni</a>, <a href="/search/hep-ex?searchtype=author&query=Gramlich%2C+B">B. Gramlich</a>, <a href="/search/hep-ex?searchtype=author&query=Grassi%2C+M">M. Grassi</a>, <a href="/search/hep-ex?searchtype=author&query=Han%2C+Y">Y. Han</a>, <a href="/search/hep-ex?searchtype=author&query=Hartnell%2C+J">J. Hartnell</a>, <a href="/search/hep-ex?searchtype=author&query=Hugon%2C+C">C. Hugon</a> , et al. (37 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1908.02859v2-abstract-short" style="display: inline;"> In 1956 Reines & Cowan discovered the neutrino using a liquid scintillator detector. The neutrinos interacted with the scintillator, producing light that propagated across transparent volumes to surrounding photo-sensors. This approach has remained one of the most widespread and successful neutrino detection technologies used since. This article introduces a concept that breaks with the convention… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.02859v2-abstract-full').style.display = 'inline'; document.getElementById('1908.02859v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1908.02859v2-abstract-full" style="display: none;"> In 1956 Reines & Cowan discovered the neutrino using a liquid scintillator detector. The neutrinos interacted with the scintillator, producing light that propagated across transparent volumes to surrounding photo-sensors. This approach has remained one of the most widespread and successful neutrino detection technologies used since. This article introduces a concept that breaks with the conventional paradigm of transparency by confining and collecting light near its creation point with an opaque scintillator and a dense array of optical fibres. This technique, called LiquidO, can provide high-resolution imaging to enable efficient identification of individual particles event-by-event. A natural affinity for adding dopants at high concentrations is provided by the use of an opaque medium. With these and other capabilities, the potential of our detector concept to unlock opportunities in neutrino physics is presented here, alongside the results of the first experimental validation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1908.02859v2-abstract-full').style.display = 'none'; document.getElementById('1908.02859v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 6 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 7 August, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">9 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Communications Physics 4, 273 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.01739">arXiv:1906.01739</a> <span> [<a href="https://arxiv.org/pdf/1906.01739">pdf</a>, <a href="https://arxiv.org/format/1906.01739">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Cosmology and Nongalactic Astrophysics">astro-ph.CO</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.ppnp.2019.103736">10.1016/j.ppnp.2019.103736 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Status of Light Sterile Neutrino Searches </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=B%C3%B6ser%2C+S">Sebastian B枚ser</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">Christian Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Giunti%2C+C">Carlo Giunti</a>, <a href="/search/hep-ex?searchtype=author&query=Lesgourgues%2C+J">Julien Lesgourgues</a>, <a href="/search/hep-ex?searchtype=author&query=Ludhova%2C+L">Livia Ludhova</a>, <a href="/search/hep-ex?searchtype=author&query=Mertens%2C+S">Susanne Mertens</a>, <a href="/search/hep-ex?searchtype=author&query=Schukraft%2C+A">Anne Schukraft</a>, <a href="/search/hep-ex?searchtype=author&query=Wurm%2C+M">Michael Wurm</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1906.01739v3-abstract-short" style="display: inline;"> A number of anomalous results in short-baseline oscillation may hint at the existence of one or more light sterile neutrino states in the eV mass range and have triggered a wave of new experimental efforts to search for a definite signature of oscillations between active and sterile neutrino states. The present paper aims to provide a comprehensive review on the status of light sterile neutrino se… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.01739v3-abstract-full').style.display = 'inline'; document.getElementById('1906.01739v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.01739v3-abstract-full" style="display: none;"> A number of anomalous results in short-baseline oscillation may hint at the existence of one or more light sterile neutrino states in the eV mass range and have triggered a wave of new experimental efforts to search for a definite signature of oscillations between active and sterile neutrino states. The present paper aims to provide a comprehensive review on the status of light sterile neutrino searches in mid-2019: we discuss not only the basic experimental approaches and sensitivities of reactor, source, atmospheric, and accelerator neutrino oscillation experiments but also the complementary bounds arising from direct neutrino mass experiments and cosmological observations. Moreover, we review current results from global oscillation analyses that include the constraints set by running reactor and atmospheric neutrino experiments. They permit to set tighter bounds on the active-sterile oscillation parameters but as yet are not able to provide a definite conclusion on the existence of eV-scale sterile neutrinos. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.01739v3-abstract-full').style.display = 'none'; document.getElementById('1906.01739v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 3 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 4 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">80 pages, 35 figures, accepted for publication by PPNP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.11967">arXiv:1905.11967</a> <span> [<a href="https://arxiv.org/pdf/1905.11967">pdf</a>, <a href="https://arxiv.org/ps/1905.11967">ps</a>, <a href="https://arxiv.org/format/1905.11967">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epja/i2019-12886-y">10.1140/epja/i2019-12886-y <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Improved STEREO simulation with a new gamma ray spectrum of excited gadolinium isotopes using FIFRELIN </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Chebboubi%2C+A">A. Chebboubi</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Atmani%2C+I+E">I. El Atmani</a>, <a href="/search/hep-ex?searchtype=author&query=Haser%2C+J">J. Haser</a>, <a href="/search/hep-ex?searchtype=author&query=Kandzia%2C+F">F. Kandzia</a>, <a href="/search/hep-ex?searchtype=author&query=Kox%2C+S">S. Kox</a>, <a href="/search/hep-ex?searchtype=author&query=Labit%2C+L">L. Labit</a>, <a href="/search/hep-ex?searchtype=author&query=Lamblin%2C+J">J. Lamblin</a>, <a href="/search/hep-ex?searchtype=author&query=Letourneau%2C+A">A. Letourneau</a>, <a href="/search/hep-ex?searchtype=author&query=Lhuillier%2C+D">D. Lhuillier</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Litaize%2C+O">O. Litaize</a>, <a href="/search/hep-ex?searchtype=author&query=Materna%2C+T">T. Materna</a>, <a href="/search/hep-ex?searchtype=author&query=Minotti%2C+A">A. Minotti</a>, <a href="/search/hep-ex?searchtype=author&query=Pessard%2C+H">H. Pessard</a>, <a href="/search/hep-ex?searchtype=author&query=R%C3%A9al%2C+J+-">J. -S. R茅al</a>, <a href="/search/hep-ex?searchtype=author&query=Roca%2C+C">C. Roca</a>, <a href="/search/hep-ex?searchtype=author&query=Salagnac%2C+T">T. Salagnac</a>, <a href="/search/hep-ex?searchtype=author&query=Savu%2C+V">V. Savu</a>, <a href="/search/hep-ex?searchtype=author&query=Schoppmann%2C+S">S. Schoppmann</a> , et al. (5 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1905.11967v2-abstract-short" style="display: inline;"> The STEREO experiment measures the electron antineutrino spectrum emitted in a research reactor using the inverse beta decay reaction on H nuclei in a gadolinium loaded liquid scintillator. The detection is based on a signal coincidence of a prompt positron and a delayed neutron capture event. The simulated response of the neutron capture on gadolinium is crucial for the comparison with data, in p… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.11967v2-abstract-full').style.display = 'inline'; document.getElementById('1905.11967v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.11967v2-abstract-full" style="display: none;"> The STEREO experiment measures the electron antineutrino spectrum emitted in a research reactor using the inverse beta decay reaction on H nuclei in a gadolinium loaded liquid scintillator. The detection is based on a signal coincidence of a prompt positron and a delayed neutron capture event. The simulated response of the neutron capture on gadolinium is crucial for the comparison with data, in particular in the case of the detection efficiency. Among all stable isotopes, $^{155}$Gd and $^{157}$Gd have the highest cross sections for thermal neutron capture. The excited nuclei after the neutron capture emit gamma rays with a total energy of about 8 MeV. The complex level schemes of $^{156}$Gd and $^{158}$Gd are a challenge for the modeling and prediction of the deexcitation spectrum, especially for compact detectors where gamma rays can escape the active volume. With a new description of the Gd(n,$纬$) cascades obtained using the FIFRELIN code, the agreement between simulation and measurements with a neutron calibration source was significantly improved in the STEREO experiment. A database of ten millions of deexcitation cascades for each isotope has been generated and is now available for the user. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.11967v2-abstract-full').style.display = 'none'; document.getElementById('1905.11967v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 October, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 28 May, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">5 pages, 3 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. A (2019) 55: 183 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.02096">arXiv:1806.02096</a> <span> [<a href="https://arxiv.org/pdf/1806.02096">pdf</a>, <a href="https://arxiv.org/format/1806.02096">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.121.161801">10.1103/PhysRevLett.121.161801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Sterile Neutrino Constraints from the STEREO Experiment with 66 days of Reactor-on Data </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Favier%2C+J">J. Favier</a>, <a href="/search/hep-ex?searchtype=author&query=Haser%2C+J">J. Haser</a>, <a href="/search/hep-ex?searchtype=author&query=H%C3%A9laine%2C+V">V. H茅laine</a>, <a href="/search/hep-ex?searchtype=author&query=Kandzia%2C+F">F. Kandzia</a>, <a href="/search/hep-ex?searchtype=author&query=Kox%2C+S">S. Kox</a>, <a href="/search/hep-ex?searchtype=author&query=Lamblin%2C+J">J. Lamblin</a>, <a href="/search/hep-ex?searchtype=author&query=Letourneau%2C+A">A. Letourneau</a>, <a href="/search/hep-ex?searchtype=author&query=Lhuillier%2C+D">D. Lhuillier</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">M. Lindner</a>, <a href="/search/hep-ex?searchtype=author&query=Manzanillas%2C+L">L. Manzanillas</a>, <a href="/search/hep-ex?searchtype=author&query=Materna%2C+T">T. Materna</a>, <a href="/search/hep-ex?searchtype=author&query=Minotti%2C+A">A. Minotti</a>, <a href="/search/hep-ex?searchtype=author&query=Montanet%2C+F">F. Montanet</a>, <a href="/search/hep-ex?searchtype=author&query=Pessard%2C+H">H. Pessard</a>, <a href="/search/hep-ex?searchtype=author&query=Real%2C+J+-">J. -S. Real</a>, <a href="/search/hep-ex?searchtype=author&query=Roca%2C+C">C. Roca</a>, <a href="/search/hep-ex?searchtype=author&query=Salagnac%2C+T">T. Salagnac</a>, <a href="/search/hep-ex?searchtype=author&query=Schoppmann%2C+S">S. Schoppmann</a>, <a href="/search/hep-ex?searchtype=author&query=Sergeyeva%2C+V">V. Sergeyeva</a> , et al. (3 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1806.02096v2-abstract-short" style="display: inline;"> The reactor antineutrino anomaly might be explained by the oscillation of reactor antineutrinos toward a sterile neutrino of eV mass. In order to explore this hypothesis, the STEREO experiment measures the antineutrino energy spectrum in six different detector cells covering baselines between 9 and 11 m from the compact core of the ILL research reactor. In this Letter, results from 66 days of reac… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.02096v2-abstract-full').style.display = 'inline'; document.getElementById('1806.02096v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.02096v2-abstract-full" style="display: none;"> The reactor antineutrino anomaly might be explained by the oscillation of reactor antineutrinos toward a sterile neutrino of eV mass. In order to explore this hypothesis, the STEREO experiment measures the antineutrino energy spectrum in six different detector cells covering baselines between 9 and 11 m from the compact core of the ILL research reactor. In this Letter, results from 66 days of reactor turned on and 138 days of reactor turned off are reported. A novel method to extract the antineutrino rates has been developed based on the distribution of the pulse shape discrimination parameter. The test of a new oscillation toward a sterile neutrino is performed by comparing ratios of cells, independent of absolute normalization and of the prediction of the reactor spectrum. The results are found to be compatible with the null oscillation hypothesis and the best fit of the reactor antineutrino anomaly is excluded at 97.5\% C.L. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.02096v2-abstract-full').style.display = 'none'; document.getElementById('1806.02096v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 June, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. Lett. 121, 161801 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.09052">arXiv:1804.09052</a> <span> [<a href="https://arxiv.org/pdf/1804.09052">pdf</a>, <a href="https://arxiv.org/format/1804.09052">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/13/07/P07009">10.1088/1748-0221/13/07/P07009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The STEREO Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Allemandou%2C+N">N. Allemandou</a>, <a href="/search/hep-ex?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/hep-ex?searchtype=author&query=Sanchez%2C+P+d+A">P. del Amo Sanchez</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+L">L. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Bernard%2C+C">C. Bernard</a>, <a href="/search/hep-ex?searchtype=author&query=Blanchet%2C+A">A. Blanchet</a>, <a href="/search/hep-ex?searchtype=author&query=Bonhomme%2C+A">A. Bonhomme</a>, <a href="/search/hep-ex?searchtype=author&query=Bosson%2C+G">G. Bosson</a>, <a href="/search/hep-ex?searchtype=author&query=Bourrion%2C+O">O. Bourrion</a>, <a href="/search/hep-ex?searchtype=author&query=Bouvier%2C+J">J. Bouvier</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Caillot%2C+V">V. Caillot</a>, <a href="/search/hep-ex?searchtype=author&query=Chala%2C+M">M. Chala</a>, <a href="/search/hep-ex?searchtype=author&query=Champion%2C+P">P. Champion</a>, <a href="/search/hep-ex?searchtype=author&query=Charon%2C+P">P. Charon</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A">A. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Contrepois%2C+P">P. Contrepois</a>, <a href="/search/hep-ex?searchtype=author&query=Coulloux%2C+G">G. Coulloux</a>, <a href="/search/hep-ex?searchtype=author&query=Desbri%C3%A8res%2C+B">B. Desbri猫res</a>, <a href="/search/hep-ex?searchtype=author&query=Deleglise%2C+G">G. Deleglise</a>, <a href="/search/hep-ex?searchtype=author&query=Kanawati%2C+W+E">W. El Kanawati</a>, <a href="/search/hep-ex?searchtype=author&query=Favier%2C+J">J. Favier</a>, <a href="/search/hep-ex?searchtype=author&query=Fuard%2C+S">S. Fuard</a>, <a href="/search/hep-ex?searchtype=author&query=Monteiro%2C+I+G">I. Gomes Monteiro</a>, <a href="/search/hep-ex?searchtype=author&query=Gramlich%2C+B">B. Gramlich</a> , et al. (40 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1804.09052v2-abstract-short" style="display: inline;"> The STEREO experiment is a very short baseline reactor antineutrino experiment aiming at testing the hypothesis of light sterile neutrinos as an explanation of the deficit of the observed neutrino interaction rate with respect to the predicted rate, known as the Reactor Antineutrino Anomaly. The detector center is located 10 m away from the compact, highly $^{235}$U enriched core of the research n… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.09052v2-abstract-full').style.display = 'inline'; document.getElementById('1804.09052v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.09052v2-abstract-full" style="display: none;"> The STEREO experiment is a very short baseline reactor antineutrino experiment aiming at testing the hypothesis of light sterile neutrinos as an explanation of the deficit of the observed neutrino interaction rate with respect to the predicted rate, known as the Reactor Antineutrino Anomaly. The detector center is located 10 m away from the compact, highly $^{235}$U enriched core of the research nuclear reactor of the Institut Laue Langevin in Grenoble, France. This paper describes the STEREO site, the detector components and associated shielding designed to suppress the external sources of background which were characterized on site. It reports the performances in terms of detector response and energy reconstruction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.09052v2-abstract-full').style.display = 'none'; document.getElementById('1804.09052v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 24 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">32 pages, 17 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Instrumentation 13, 07 (2018): P07009 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1802.08048">arXiv:1802.08048</a> <span> [<a href="https://arxiv.org/pdf/1802.08048">pdf</a>, <a href="https://arxiv.org/format/1802.08048">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP11(2018)053">10.1007/JHEP11(2018)053 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Yields and production rates of cosmogenic $^9$Li and $^8$He measured with the Double Chooz near and far detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=de+Kerret%2C+H">H. de Kerret</a>, <a href="/search/hep-ex?searchtype=author&query=Abrah%C3%A3o%2C+T">T. Abrah茫o</a>, <a href="/search/hep-ex?searchtype=author&query=Almazan%2C+H">H. Almazan</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Appel%2C+S">S. Appel</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Brugi%C3%A8re%2C+T">T. Brugi猫re</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Corpace%2C+O">O. Corpace</a>, <a href="/search/hep-ex?searchtype=author&query=Dawson%2C+J+V">J. V. Dawson</a>, <a href="/search/hep-ex?searchtype=author&query=Djurcic%2C+Z">Z. Djurcic</a>, <a href="/search/hep-ex?searchtype=author&query=Etenko%2C+A">A. Etenko</a>, <a href="/search/hep-ex?searchtype=author&query=Franco%2C+D">D. Franco</a>, <a href="/search/hep-ex?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/hep-ex?searchtype=author&query=Gil-Botella%2C+I">I. Gil-Botella</a>, <a href="/search/hep-ex?searchtype=author&query=Givaudan%2C+A">A. Givaudan</a> , et al. (73 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1802.08048v3-abstract-short" style="display: inline;"> The yields and production rates of the radioisotopes $^9$Li and $^8$He created by cosmic muon spallation on $^{12}$C, have been measured by the two detectors of the Double Chooz experiment. The identical detectors are located at separate sites and depths, which means they are subject to different muon spectra. The near (far) detector has an overburden of $\sim$120 m.w.e. ($\sim$300 m.w.e.) corresp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.08048v3-abstract-full').style.display = 'inline'; document.getElementById('1802.08048v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1802.08048v3-abstract-full" style="display: none;"> The yields and production rates of the radioisotopes $^9$Li and $^8$He created by cosmic muon spallation on $^{12}$C, have been measured by the two detectors of the Double Chooz experiment. The identical detectors are located at separate sites and depths, which means they are subject to different muon spectra. The near (far) detector has an overburden of $\sim$120 m.w.e. ($\sim$300 m.w.e.) corresponding to a mean muon energy of $32.1\pm2.0\,\mathrm{GeV}$ ($63.7\pm5.5\,\mathrm{GeV}$). Comparing the data to a detailed simulation of the $^9$Li and $^8$He decays, the contribution of the $^8$He radioisotope at both detectors is found to be compatible with zero. The observed $^9$Li yields in the near and far detectors are $5.51\pm0.51$ and $7.90\pm0.51$, respectively, in units of $10^{-8}渭^{-1} \mathrm{g^{-1} cm^{2} }$. The shallow overburdens of the near and far detectors give a unique insight when combined with measurements by KamLAND and Borexino to give the first multi--experiment, data driven relationship between the $^9$Li yield and the mean muon energy according to the power law $Y = Y_0( <E_渭 >/ 1\,\mathrm{GeV})^{\overline伪}$, giving $\overline伪=0.72\pm0.06$ and $Y_0=(0.43\pm0.11)\times 10^{-8}渭^{-1} \mathrm{g^{-1} cm^{2}}$. This relationship gives future liquid scintillator based experiments the ability to predict their cosmogenic $^9$Li background rates. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1802.08048v3-abstract-full').style.display = 'none'; document.getElementById('1802.08048v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 10 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 February, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2018. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">15 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1710.04315">arXiv:1710.04315</a> <span> [<a href="https://arxiv.org/pdf/1710.04315">pdf</a>, <a href="https://arxiv.org/format/1710.04315">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/13/01/P01031">10.1088/1748-0221/13/01/P01031 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Novel event classification based on spectral analysis of scintillation waveforms in Double Chooz </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abrah%C3%A3o%2C+T">T. Abrah茫o</a>, <a href="/search/hep-ex?searchtype=author&query=Almazan%2C+H">H. Almazan</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Appel%2C+S">S. Appel</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Brugi%C3%A8re%2C+T">T. Brugi猫re</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Corpace%2C+O">O. Corpace</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anad%C3%B3n%2C+J+I">J. I. Crespo-Anad贸n</a>, <a href="/search/hep-ex?searchtype=author&query=Dawson%2C+J+V">J. V. Dawson</a>, <a href="/search/hep-ex?searchtype=author&query=Djurcic%2C+Z">Z. Djurcic</a>, <a href="/search/hep-ex?searchtype=author&query=Etenko%2C+A">A. Etenko</a>, <a href="/search/hep-ex?searchtype=author&query=Fallot%2C+M">M. Fallot</a>, <a href="/search/hep-ex?searchtype=author&query=Franco%2C+D">D. Franco</a>, <a href="/search/hep-ex?searchtype=author&query=Furuta%2C+H">H. Furuta</a>, <a href="/search/hep-ex?searchtype=author&query=Gil-Botella%2C+I">I. Gil-Botella</a> , et al. (72 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1710.04315v3-abstract-short" style="display: inline;"> Liquid scintillators are a common choice for neutrino physics experiments, but their capabilities to perform background rejection by scintillation pulse shape discrimination is generally limited in large detectors. This paper describes a novel approach for a pulse shape based event classification developed in the context of the Double Chooz reactor antineutrino experiment. Unlike previous implemen… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.04315v3-abstract-full').style.display = 'inline'; document.getElementById('1710.04315v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1710.04315v3-abstract-full" style="display: none;"> Liquid scintillators are a common choice for neutrino physics experiments, but their capabilities to perform background rejection by scintillation pulse shape discrimination is generally limited in large detectors. This paper describes a novel approach for a pulse shape based event classification developed in the context of the Double Chooz reactor antineutrino experiment. Unlike previous implementations, this method uses the Fourier power spectra of the scintillation pulse shapes to obtain event-wise information. A classification variable built from spectral information was able to achieve an unprecedented performance, despite the lack of optimization at the detector design level. Several examples of event classification are provided, ranging from differentiation between the detector volumes and an efficient rejection of instrumental light noise, to some sensitivity to the particle type, such as stopping muons, ortho-positronium formation, alpha particles as well as electrons and positrons. In combination with other techniques the method is expected to allow for a versatile and more efficient background rejection in the future, especially if detector optimization is taken into account at the design level. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1710.04315v3-abstract-full').style.display = 'none'; document.getElementById('1710.04315v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 18 January, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 11 October, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">27 pages, 14 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Instrumentation, Volume 13, Number 01 (2018) P01031 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1704.08885">arXiv:1704.08885</a> <span> [<a href="https://arxiv.org/pdf/1704.08885">pdf</a>, <a href="https://arxiv.org/ps/1704.08885">ps</a>, <a href="https://arxiv.org/format/1704.08885">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Phenomenology">hep-ph</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> </div> <p class="title is-5 mathjax"> Sterile Neutrinos: Reactor Experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">Christian Buck</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1704.08885v1-abstract-short" style="display: inline;"> Nuclear reactors are strong, pure and well localized sources of electron antineutrinos with energies in the few MeV range. Therefore they provide a suitable environment to study neutrino properties, in particular neutrino oscillation parameters. Recent predictions of the expected antineutrino flux at nuclear reactors are about 6% higher than the average rate measured in different experiments. This… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.08885v1-abstract-full').style.display = 'inline'; document.getElementById('1704.08885v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1704.08885v1-abstract-full" style="display: none;"> Nuclear reactors are strong, pure and well localized sources of electron antineutrinos with energies in the few MeV range. Therefore they provide a suitable environment to study neutrino properties, in particular neutrino oscillation parameters. Recent predictions of the expected antineutrino flux at nuclear reactors are about 6% higher than the average rate measured in different experiments. This discrepancy, known as the reactor antineutrino anomaly, is significant at the 2.5蟽 level. Several new experiments are searching for the origin of this observed neutrino deficit. One hypothesis to be tested is an oscillation to another neutrino state. In a three flavor model reactor neutrinos do not oscillate at baselines below 100 m. Hence, if such an oscillation is observed, it would imply the existence of at least one light sterile neutrino state not participating in weak interactions. Such a discovery would open the gate for new physics beyond the Standard Model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1704.08885v1-abstract-full').style.display = 'none'; document.getElementById('1704.08885v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 April, 2017; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2017. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Talk presented at NuPhys2016 (London, 12-14 December 2016). 8 pages</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> NuPhys2016-Buck </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1611.07845">arXiv:1611.07845</a> <span> [<a href="https://arxiv.org/pdf/1611.07845">pdf</a>, <a href="https://arxiv.org/format/1611.07845">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1475-7516/2017/02/017">10.1088/1475-7516/2017/02/017 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Cosmic-muon characterization and annual modulation measurement with Double Chooz detectors </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abrah%C3%A3o%2C+T">T. Abrah茫o</a>, <a href="/search/hep-ex?searchtype=author&query=Almazan%2C+H">H. Almazan</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Appel%2C+S">S. Appel</a>, <a href="/search/hep-ex?searchtype=author&query=Baussan%2C+E">E. Baussan</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Brugi%C3%A8re%2C+T">T. Brugi猫re</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Corpace%2C+O">O. Corpace</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anad%C3%B3n%2C+J+I">J. I. Crespo-Anad贸n</a>, <a href="/search/hep-ex?searchtype=author&query=Dawson%2C+J+V">J. V. Dawson</a>, <a href="/search/hep-ex?searchtype=author&query=Dhooghe%2C+J">J. Dhooghe</a>, <a href="/search/hep-ex?searchtype=author&query=Djurcic%2C+Z">Z. Djurcic</a>, <a href="/search/hep-ex?searchtype=author&query=Dracos%2C+M">M. Dracos</a>, <a href="/search/hep-ex?searchtype=author&query=Etenko%2C+A">A. Etenko</a> , et al. (85 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1611.07845v4-abstract-short" style="display: inline;"> A study on cosmic muons has been performed for the two identical near and far neutrino detectors of the Double Chooz experiment, placed at $\sim$120 and $\sim$300 m.w.e. underground respectively, including the corresponding simulations using the MUSIC simulation package. This characterization has allowed to measure the muon flux reaching both detectors to be (3.64 $\pm$ 0.04) $\times$ 10$^{-4}$ cm… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.07845v4-abstract-full').style.display = 'inline'; document.getElementById('1611.07845v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1611.07845v4-abstract-full" style="display: none;"> A study on cosmic muons has been performed for the two identical near and far neutrino detectors of the Double Chooz experiment, placed at $\sim$120 and $\sim$300 m.w.e. underground respectively, including the corresponding simulations using the MUSIC simulation package. This characterization has allowed to measure the muon flux reaching both detectors to be (3.64 $\pm$ 0.04) $\times$ 10$^{-4}$ cm$^{-2}$s$^{-1}$ for the near detector and (7.00 $\pm$ 0.05) $\times$ 10$^{-5}$ cm$^{-2}$s$^{-1}$ for the far one. The seasonal modulation of the signal has also been studied observing a positive correlation with the atmospheric temperature, leading to an effective temperature coefficient of $伪_{T}$ = 0.212 $\pm$ 0.024 and 0.355 $\pm$ 0.019 for the near and far detectors respectively. These measurements, in good agreement with expectations based on theoretical models, represent one of the first measurements of this coefficient in shallow depth installations. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1611.07845v4-abstract-full').style.display = 'none'; document.getElementById('1611.07845v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 February, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 November, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">20 pages, 11 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of Cosmology and Astroparticle Physics 02 (2017) 017 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1604.06895">arXiv:1604.06895</a> <span> [<a href="https://arxiv.org/pdf/1604.06895">pdf</a>, <a href="https://arxiv.org/format/1604.06895">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1088/1748-0221/11/08/P08001">10.1088/1748-0221/11/08/P08001 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Characterization of the Spontaneous Light Emission of the PMTs used in the Double Chooz Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Double+Chooz+collaboration"> Double Chooz collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Abrah%C3%A3o%2C+T">T. Abrah茫o</a>, <a href="/search/hep-ex?searchtype=author&query=Almazan%2C+H">H. Almazan</a>, <a href="/search/hep-ex?searchtype=author&query=Alt%2C+C">C. Alt</a>, <a href="/search/hep-ex?searchtype=author&query=Appel%2C+S">S. Appel</a>, <a href="/search/hep-ex?searchtype=author&query=Baussan%2C+E">E. Baussan</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Brugi%C3%A8re%2C+T">T. Brugi猫re</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Calvo%2C+E">E. Calvo</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a> , et al. (124 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1604.06895v2-abstract-short" style="display: inline;"> During the commissioning of the first of the two detectors of the Double Chooz experiment, an unexpected and dominant background caused by the emission of light inside the optical volume has been observed. A specific study of the ensemble of phenomena called "Light Noise" has been carried out in-situ, and in an external laboratory, in order to characterize the signals and to identify the possible… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.06895v2-abstract-full').style.display = 'inline'; document.getElementById('1604.06895v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1604.06895v2-abstract-full" style="display: none;"> During the commissioning of the first of the two detectors of the Double Chooz experiment, an unexpected and dominant background caused by the emission of light inside the optical volume has been observed. A specific study of the ensemble of phenomena called "Light Noise" has been carried out in-situ, and in an external laboratory, in order to characterize the signals and to identify the possible processes underlying the effect. Some mechanisms of instrumental noise originating from the PMTs were identified and it has been found that the leading one arises from the light emission localized on the photomultiplier base and produced by the combined effect of heat and high voltage across the transparent epoxy resin covering the electric components. The correlation of the rate and the amplitude of the signal with the temperature has been observed. For the first detector in operation the induced background has been mitigated using online and offline analysis selections based on timing and light pattern of the signals, while a modification of the photomultiplier assembly has been implemented for the second detector in order to blacken the PMT bases. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1604.06895v2-abstract-full').style.display = 'none'; document.getElementById('1604.06895v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 August, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 April, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">24 pages, 24 figures. Minor revision to be published in the Journal of Instrumentation (JINST), Corresponding author: R. Santorelli</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 11 (2016) no.08, P08001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.07562">arXiv:1512.07562</a> <span> [<a href="https://arxiv.org/pdf/1512.07562">pdf</a>, <a href="https://arxiv.org/ps/1512.07562">ps</a>, <a href="https://arxiv.org/format/1512.07562">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevC.93.054608">10.1103/PhysRevC.93.054608 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Muon capture on light isotopes in Double Chooz </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Double+Chooz+collaboration"> Double Chooz collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Abrah%C3%A3o%2C+T">T. Abrah茫o</a>, <a href="/search/hep-ex?searchtype=author&query=Almazan%2C+H">H. Almazan</a>, <a href="/search/hep-ex?searchtype=author&query=Alt%2C+C">C. Alt</a>, <a href="/search/hep-ex?searchtype=author&query=Appel%2C+S">S. Appel</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Baussan%2C+E">E. Baussan</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Brugi%C3%A8re%2C+T">T. Brugi猫re</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a> , et al. (122 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1512.07562v2-abstract-short" style="display: inline;"> Using the Double Chooz detector, designed to measure the neutrino mixing angle $胃_{13}$, the products of $渭^-$ capture on $^{12}$C, $^{13}$C, $^{14}$N and $^{16}$O have been measured. Over a period of 489.5 days, $2.3\times10^6$ stopping cosmic $渭^-$ have been collected, of which $1.8\times10^5$ captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. T… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.07562v2-abstract-full').style.display = 'inline'; document.getElementById('1512.07562v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.07562v2-abstract-full" style="display: none;"> Using the Double Chooz detector, designed to measure the neutrino mixing angle $胃_{13}$, the products of $渭^-$ capture on $^{12}$C, $^{13}$C, $^{14}$N and $^{16}$O have been measured. Over a period of 489.5 days, $2.3\times10^6$ stopping cosmic $渭^-$ have been collected, of which $1.8\times10^5$ captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. The resulting isotopes were tagged using prompt neutron emission (when applicable), the subsequent beta decays, and, in some cases, $尾$-delayed neutrons. The most precise measurement of the rate of $^{12}\mathrm C(渭^-,谓)^{12}\mathrm B$ to date is reported: $6.57^{+0.11}_{-0.21}\times10^{3}\,\mathrm s^{-1}$, or $(17.35^{+0.35}_{-0.59})\%$ of nuclear captures. By tagging excited states emitting gammas, the ground state transition rate to $^{12}$B has been determined to be $5.68^{+0.14}_{-0.23}\times10^3\,\mathrm s^{-1}$. The heretofore unobserved reactions $^{12}\mathrm C(渭^-,谓伪)^{8}\mathrm{Li}$, $^{13}\mathrm C(渭^-,谓\mathrm n伪)^{8}\mathrm{Li}$, and $^{13}\mathrm C(渭^-,谓\mathrm n)^{12}\mathrm B$ are measured. Further, a population of $尾$n decays following stopping muons is identified with $5.5蟽$ significance. Statistics limit our ability to identify these decays definitively. Assuming negligible production of $^{8}$He, the reaction $^{13}\mathrm C(渭^-,谓伪)^{9}\mathrm{Li}$ is found to be present at the $2.7蟽$ level. Limits are set on a variety of other processes. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.07562v2-abstract-full').style.display = 'none'; document.getElementById('1512.07562v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 17 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">21 pages, 14 figures. Minor revisions. Corresponding author: M. Strait</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 93, 054608 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1512.06656">arXiv:1512.06656</a> <span> [<a href="https://arxiv.org/pdf/1512.06656">pdf</a>, <a href="https://arxiv.org/format/1512.06656">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2016.11.062">10.1016/j.physletb.2016.11.062 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Investigating the Spectral Anomaly with Different Reactor Antineutrino Experiments </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">Christian Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">Antoine P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Haser%2C+J">Julia Haser</a>, <a href="/search/hep-ex?searchtype=author&query=Lindner%2C+M">Manfred Lindner</a> </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1512.06656v2-abstract-short" style="display: inline;"> The spectral shape of reactor antineutrinos measured in recent experiments shows anomalies in comparison to neutrino reference spectra. New precision measurements of the reactor neutrino spectra as well as more complete input in nuclear data bases are needed to resolve the observed discrepancies between models and experimental results. This article proposes the combination of experiments at reacto… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.06656v2-abstract-full').style.display = 'inline'; document.getElementById('1512.06656v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1512.06656v2-abstract-full" style="display: none;"> The spectral shape of reactor antineutrinos measured in recent experiments shows anomalies in comparison to neutrino reference spectra. New precision measurements of the reactor neutrino spectra as well as more complete input in nuclear data bases are needed to resolve the observed discrepancies between models and experimental results. This article proposes the combination of experiments at reactors which are highly enriched in ${}^{235}$U with commercial reactors with typically lower enrichment to gain new insights into the origin of the anomalous neutrino spectrum. The presented method clarifies, if the spectral anomaly is either solely or not at all related to the predicted ${}^{235}$U spectrum. Considering the current improvements of the energy scale uncertainty of present-day experiments, a significance of three sigma and above can be reached. As an example, we discuss the option of a direct comparison of the measured shape in the currently running Double Chooz near detector and the upcoming Stereo experiment. A quantitative feasibility study emphasizes that a precise understanding of the energy scale systematics is a crucial prerequisite in recent and next generation experiments investigating the spectral anomaly. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1512.06656v2-abstract-full').style.display = 'none'; document.getElementById('1512.06656v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 December, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 21 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Physics Letters B, Volume 765, 10 February 2017, Pages 159-162 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1510.08937">arXiv:1510.08937</a> <span> [<a href="https://arxiv.org/pdf/1510.08937">pdf</a>, <a href="https://arxiv.org/ps/1510.08937">ps</a>, <a href="https://arxiv.org/format/1510.08937">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP01(2016)163">10.1007/JHEP01(2016)163 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of $胃_{13}$ in Double Chooz using neutron captures on hydrogen with novel background rejection techniques </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Appel%2C+S">S. Appel</a>, <a href="/search/hep-ex?searchtype=author&query=Abrah%C3%A3o%2C+T">T. Abrah茫o</a>, <a href="/search/hep-ex?searchtype=author&query=Almazan%2C+H">H. Almazan</a>, <a href="/search/hep-ex?searchtype=author&query=Alt%2C+C">C. Alt</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Baussan%2C+E">E. Baussan</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Brugi%C3%A8re%2C+T">T. Brugi猫re</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anad%C3%B3n%2C+J+I">J. I. Crespo-Anad贸n</a> , et al. (120 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1510.08937v2-abstract-short" style="display: inline;"> The Double Chooz collaboration presents a measurement of the neutrino mixing angle $胃_{13}$ using reactor $\overline谓_{e}$ observed via the inverse beta decay reaction in which the neutron is captured on hydrogen. This measurement is based on 462.72 live days data, approximately twice as much data as in the previous such analysis, collected with a detector positioned at an average distance of 1050… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.08937v2-abstract-full').style.display = 'inline'; document.getElementById('1510.08937v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1510.08937v2-abstract-full" style="display: none;"> The Double Chooz collaboration presents a measurement of the neutrino mixing angle $胃_{13}$ using reactor $\overline谓_{e}$ observed via the inverse beta decay reaction in which the neutron is captured on hydrogen. This measurement is based on 462.72 live days data, approximately twice as much data as in the previous such analysis, collected with a detector positioned at an average distance of 1050m from two reactor cores. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties. Accidental coincidences, the dominant background in this analysis, are suppressed by more than an order of magnitude with respect to our previous publication by a multi-variate analysis. These improvements demonstrate the capability of precise measurement of reactor $\overline谓_{e}$ without gadolinium loading. Spectral distortions from the $\overline谓_{e}$ reactor flux predictions previously reported with the neutron capture on gadolinium events are confirmed in the independent data sample presented here. A value of $\sin^{2}2胃_{13} = 0.095^{+0.038}_{-0.039}$(stat+syst) is obtained from a fit to the observed event rate as a function of the reactor power, a method insensitive to the energy spectrum shape. A simultaneous fit of the hydrogen capture events and of the gadolinium capture events yields a measurement of $\sin^{2}2胃_{13} = 0.088\pm0.033$(stat+syst). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1510.08937v2-abstract-full').style.display = 'none'; document.getElementById('1510.08937v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 28 December, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 October, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 01 (2016) 163 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1509.05610">arXiv:1509.05610</a> <span> [<a href="https://arxiv.org/pdf/1509.05610">pdf</a>, <a href="https://arxiv.org/format/1509.05610">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.93.112006">10.1103/PhysRevD.93.112006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Online Monitoring of the Osiris Reactor with the Nucifer Neutrino Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Boireau%2C+G">G. Boireau</a>, <a href="/search/hep-ex?searchtype=author&query=Bouvet%2C+L">L. Bouvet</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Coulloux%2C+G">G. Coulloux</a>, <a href="/search/hep-ex?searchtype=author&query=Cribier%2C+M">M. Cribier</a>, <a href="/search/hep-ex?searchtype=author&query=Deschamp%2C+H">H. Deschamp</a>, <a href="/search/hep-ex?searchtype=author&query=Durand%2C+V">V. Durand</a>, <a href="/search/hep-ex?searchtype=author&query=Fechner%2C+M">M. Fechner</a>, <a href="/search/hep-ex?searchtype=author&query=Fischer%2C+V">V. Fischer</a>, <a href="/search/hep-ex?searchtype=author&query=Gaffiot%2C+J">J. Gaffiot</a>, <a href="/search/hep-ex?searchtype=author&query=Castaing%2C+N+G">N. Gerard Castaing</a>, <a href="/search/hep-ex?searchtype=author&query=Granelli%2C+R">R. Granelli</a>, <a href="/search/hep-ex?searchtype=author&query=Kato%2C+Y">Y. Kato</a>, <a href="/search/hep-ex?searchtype=author&query=Lasserre%2C+T">T. Lasserre</a>, <a href="/search/hep-ex?searchtype=author&query=Latron%2C+L">L. Latron</a>, <a href="/search/hep-ex?searchtype=author&query=Legou%2C+P">P. Legou</a>, <a href="/search/hep-ex?searchtype=author&query=Letourneau%2C+A">A. Letourneau</a>, <a href="/search/hep-ex?searchtype=author&query=Lhuillier%2C+D">D. Lhuillier</a>, <a href="/search/hep-ex?searchtype=author&query=Mention%2C+G">G. Mention</a>, <a href="/search/hep-ex?searchtype=author&query=Mueller%2C+T">T. Mueller</a>, <a href="/search/hep-ex?searchtype=author&query=Nghiem%2C+T">T-A. Nghiem</a>, <a href="/search/hep-ex?searchtype=author&query=Pedrol%2C+N">N. Pedrol</a>, <a href="/search/hep-ex?searchtype=author&query=Pelzer%2C+J">J. Pelzer</a>, <a href="/search/hep-ex?searchtype=author&query=Pequignot%2C+M">M. Pequignot</a>, <a href="/search/hep-ex?searchtype=author&query=Piret%2C+Y">Y. Piret</a> , et al. (29 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1509.05610v4-abstract-short" style="display: inline;"> Originally designed as a new nuclear reactor monitoring device, the Nucifer detector has successfully detected its first neutrinos. We provide the second shortest baseline measurement of the reactor neutrino flux. The detection of electron antineutrinos emitted in the decay chains of the fission products, combined with reactor core simulations, provides an new tool to assess both the thermal power… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.05610v4-abstract-full').style.display = 'inline'; document.getElementById('1509.05610v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1509.05610v4-abstract-full" style="display: none;"> Originally designed as a new nuclear reactor monitoring device, the Nucifer detector has successfully detected its first neutrinos. We provide the second shortest baseline measurement of the reactor neutrino flux. The detection of electron antineutrinos emitted in the decay chains of the fission products, combined with reactor core simulations, provides an new tool to assess both the thermal power and the fissile content of the whole nuclear core and could be used by the Inter- national Agency for Atomic Energy (IAEA) to enhance the Safeguards of civil nuclear reactors. Deployed at only 7.2m away from the compact Osiris research reactor core (70MW) operating at the Saclay research centre of the French Alternative Energies and Atomic Energy Commission (CEA), the experiment also exhibits a well-suited configuration to search for a new short baseline oscillation. We report the first results of the Nucifer experiment, describing the performances of the 0.85m3 detector remotely operating at a shallow depth equivalent to 12m of water and under intense background radiation conditions. Based on 145 (106) days of data with reactor ON (OFF), leading to the detection of an estimated 40760 electron antineutrinos, the mean number of detected antineutrinos is 281 +- 7(stat) +- 18(syst) electron antineutrinos/day, in agreement with the prediction 277(23) electron antineutrinos/day. Due the the large background no conclusive results on the existence of light sterile neutrinos could be derived, however. As a first societal application we quantify how antineutrinos could be used for the Plutonium Management and Disposition Agreement. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1509.05610v4-abstract-full').style.display = 'none'; document.getElementById('1509.05610v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 May, 2016; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 18 September, 2015; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2015. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 16 figures - Version 4</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 93, 112006 (2016) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1407.6913">arXiv:1407.6913</a> <span> [<a href="https://arxiv.org/pdf/1407.6913">pdf</a>, <a href="https://arxiv.org/ps/1407.6913">ps</a>, <a href="https://arxiv.org/format/1407.6913">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP10(2014)032">10.1007/JHEP10(2014)032 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ortho-positronium observation in the Double Chooz Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Baussan%2C+E">E. Baussan</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Caden%2C+E">E. Caden</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P+-">P. -J. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anadon%2C+J+I">J. I. Crespo-Anadon</a>, <a href="/search/hep-ex?searchtype=author&query=Crum%2C+K">K. Crum</a>, <a href="/search/hep-ex?searchtype=author&query=Cucoanes%2C+A+S">A. S. Cucoanes</a> , et al. (121 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1407.6913v2-abstract-short" style="display: inline;"> The Double Chooz experiment measures the neutrino mixing angle $胃_{13}$ by detecting reactor $\bar谓_e$ via inverse beta decay. The positron-neutron space and time coincidence allows for a sizable background rejection, nonetheless liquid scintillator detectors would profit from a positron/electron discrimination, if feasible in large detector, to suppress the remaining background. Standard particle… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.6913v2-abstract-full').style.display = 'inline'; document.getElementById('1407.6913v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1407.6913v2-abstract-full" style="display: none;"> The Double Chooz experiment measures the neutrino mixing angle $胃_{13}$ by detecting reactor $\bar谓_e$ via inverse beta decay. The positron-neutron space and time coincidence allows for a sizable background rejection, nonetheless liquid scintillator detectors would profit from a positron/electron discrimination, if feasible in large detector, to suppress the remaining background. Standard particle identification, based on particle dependent time profile of photon emission in liquid scintillator, can not be used given the identical mass of the two particles. However, the positron annihilation is sometimes delayed by the ortho-positronium (o-Ps) metastable state formation, which induces a pulse shape distortion that could be used for positron identification. In this paper we report on the first observation of positronium formation in a large liquid scintillator detector based on pulse shape analysis of single events. The o-Ps formation fraction and its lifetime were measured, finding the values of 44$\%$ $\pm$ 12$\%$ (sys.) $\pm$ 5$\%$ (stat.) and $3.68$ns $\pm$ 0.17ns (sys.) $\pm$ 0.15ns (stat.) respectively, in agreement with the results obtained with a dedicated positron annihilation lifetime spectroscopy setup. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1407.6913v2-abstract-full').style.display = 'none'; document.getElementById('1407.6913v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 7 October, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 July, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 5 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 1410 (2014) 032 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1406.7763">arXiv:1406.7763</a> <span> [<a href="https://arxiv.org/pdf/1406.7763">pdf</a>, <a href="https://arxiv.org/ps/1406.7763">ps</a>, <a href="https://arxiv.org/format/1406.7763">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1007/JHEP10(2014)086">10.1007/JHEP10(2014)086 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Improved measurements of the neutrino mixing angle $胃_{13}$ with the Double Chooz detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Baussan%2C+E">E. Baussan</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Caden%2C+E">E. Caden</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P+-">P. -J. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anad%C3%B3n%2C+J+I">J. I. Crespo-Anad贸n</a>, <a href="/search/hep-ex?searchtype=author&query=Crum%2C+K">K. Crum</a>, <a href="/search/hep-ex?searchtype=author&query=Cucoanes%2C+A+S">A. S. Cucoanes</a> , et al. (121 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1406.7763v4-abstract-short" style="display: inline;"> The Double Chooz experiment presents improved measurements of the neutrino mixing angle $胃_{13}$ using the data collected in 467.90 live days from a detector positioned at an average distance of 1050 m from two reactor cores at the Chooz nuclear power plant. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties with respect t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1406.7763v4-abstract-full').style.display = 'inline'; document.getElementById('1406.7763v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1406.7763v4-abstract-full" style="display: none;"> The Double Chooz experiment presents improved measurements of the neutrino mixing angle $胃_{13}$ using the data collected in 467.90 live days from a detector positioned at an average distance of 1050 m from two reactor cores at the Chooz nuclear power plant. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties with respect to previous publications, whereas the efficiency of the $\bar谓_{e}$ signal has increased. The value of $胃_{13}$ is measured to be $\sin^{2}2胃_{13} = 0.090 ^{+0.032}_{-0.029}$ from a fit to the observed energy spectrum. Deviations from the reactor $\bar谓_{e}$ prediction observed above a prompt signal energy of 4 MeV and possible explanations are also reported. A consistent value of $胃_{13}$ is obtained from a fit to the observed rate as a function of the reactor power independently of the spectrum shape and background estimation, demonstrating the robustness of the $胃_{13}$ measurement despite the observed distortion. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1406.7763v4-abstract-full').style.display = 'none'; document.getElementById('1406.7763v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 21 January, 2015; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 June, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">44 pages, 25 figures. Figures 21 and 22 have been replaced (statistical error bars for bins above 8 MeV have become smaller). No other changes in the results of the paper; an Erratum submitted to JHEP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 10 (2014) 086 [Erratum ibid. 02 (2015) 074] </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1405.6227">arXiv:1405.6227</a> <span> [<a href="https://arxiv.org/pdf/1405.6227">pdf</a>, <a href="https://arxiv.org/format/1405.6227">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.nima.2014.07.058">10.1016/j.nima.2014.07.058 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precision Muon Reconstruction in Double Chooz </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Double+Chooz+collaboration"> Double Chooz collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Baussan%2C+E">E. Baussan</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Caden%2C+E">E. Caden</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P+-">P. -J. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anad%C3%B3n%2C+J+I">J. I. Crespo-Anad贸n</a>, <a href="/search/hep-ex?searchtype=author&query=Crum%2C+K">K. Crum</a> , et al. (119 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1405.6227v2-abstract-short" style="display: inline;"> We describe a muon track reconstruction algorithm for the reactor anti-neutrino experiment Double Chooz. The Double Chooz detector consists of two optically isolated volumes of liquid scintillator viewed by PMTs, and an Outer Veto above these made of crossed scintillator strips. Muons are reconstructed by their Outer Veto hit positions along with timing information from the other two detector volu… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.6227v2-abstract-full').style.display = 'inline'; document.getElementById('1405.6227v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1405.6227v2-abstract-full" style="display: none;"> We describe a muon track reconstruction algorithm for the reactor anti-neutrino experiment Double Chooz. The Double Chooz detector consists of two optically isolated volumes of liquid scintillator viewed by PMTs, and an Outer Veto above these made of crossed scintillator strips. Muons are reconstructed by their Outer Veto hit positions along with timing information from the other two detector volumes. All muons are fit under the hypothesis that they are through-going and ultrarelativistic. If the energy depositions suggest that the muon may have stopped, the reconstruction fits also for this hypothesis and chooses between the two via the relative goodness-of-fit. In the ideal case of a through-going muon intersecting the center of the detector, the resolution is ~40 mm in each transverse dimension. High quality muon reconstruction is an important tool for reducing the impact of the cosmogenic isotope background in Double Chooz. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1405.6227v2-abstract-full').style.display = 'none'; document.getElementById('1405.6227v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 15 August, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 May, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">12 pages, 8 figures, submitted to Nuclear Instrumentation and Methods A. Author list corrected</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nucl.Instrum.Meth.A 764 (2014) 330-339 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1401.5981">arXiv:1401.5981</a> <span> [<a href="https://arxiv.org/pdf/1401.5981">pdf</a>, <a href="https://arxiv.org/ps/1401.5981">ps</a>, <a href="https://arxiv.org/format/1401.5981">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2014.04.045">10.1016/j.physletb.2014.04.045 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Background-independent measurement of $胃_{13}$ in Double Chooz </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Baussan%2C+E">E. Baussan</a>, <a href="/search/hep-ex?searchtype=author&query=Bekman%2C+I">I. Bekman</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Caden%2C+E">E. Caden</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P+-">P. -J. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chauveau%2C+E">E. Chauveau</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anad%C3%B3n%2C+J+I">J. I. Crespo-Anad贸n</a>, <a href="/search/hep-ex?searchtype=author&query=Crum%2C+K">K. Crum</a>, <a href="/search/hep-ex?searchtype=author&query=Cucoanes%2C+A">A. Cucoanes</a> , et al. (121 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1401.5981v2-abstract-short" style="display: inline;"> The oscillation results published by the Double Chooz collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle $胃_{13}$ by including 7.53 days of reactor-off data. A global fit of the observed neutrino rates for different reactor power conditions is performed, yielding a me… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.5981v2-abstract-full').style.display = 'inline'; document.getElementById('1401.5981v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1401.5981v2-abstract-full" style="display: none;"> The oscillation results published by the Double Chooz collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle $胃_{13}$ by including 7.53 days of reactor-off data. A global fit of the observed neutrino rates for different reactor power conditions is performed, yielding a measurement of both $胃_{13}$ and the total background rate. The results on the mixing angle are improved significantly by including the reactor-off data in the fit, as it provides a direct measurement of the total background rate. This reactor rate modulation analysis considers antineutrino candidates with neutron captures on both Gd and H, whose combination yields $\sin^2(2胃_{13})=$ 0.102 $\pm$ 0.028(stat.) $\pm$ 0.033(syst.). The results presented in this study are fully consistent with the ones already published by Double Chooz, achieving a competitive precision. They provide, for the first time, a determination of $胃_{13}$ that does not depend on a background model. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1401.5981v2-abstract-full').style.display = 'none'; document.getElementById('1401.5981v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 April, 2014; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 January, 2014; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2014. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Lett. B735 (2014) 51-56 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1301.2948">arXiv:1301.2948</a> <span> [<a href="https://arxiv.org/pdf/1301.2948">pdf</a>, <a href="https://arxiv.org/ps/1301.2948">ps</a>, <a href="https://arxiv.org/format/1301.2948">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1016/j.physletb.2013.04.050">10.1016/j.physletb.2013.04.050 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First Measurement of 胃_13 from Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Double+Chooz+Collaboration"> Double Chooz Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Aberle%2C+C">C. Aberle</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bernstein%2C+A">A. Bernstein</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukhov%2C+L">L. Bezrukhov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Bowden%2C+N+S">N. S. Bowden</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Caden%2C+E">E. Caden</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P+-">P. -J. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Classen%2C+T">T. Classen</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anad%C3%B3n%2C+J+I">J. I. Crespo-Anad贸n</a> , et al. (147 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1301.2948v2-abstract-short" style="display: inline;"> The Double Chooz experiment has determined the value of the neutrino oscillation parameter $胃_{13}$ from an analysis of inverse beta decay interactions with neutron capture on hydrogen. This analysis uses a three times larger fiducial volume than the standard Double Chooz assessment, which is restricted to a region doped with gadolinium (Gd), yielding an exposure of 113.1 GW-ton-years. The data sa… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1301.2948v2-abstract-full').style.display = 'inline'; document.getElementById('1301.2948v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1301.2948v2-abstract-full" style="display: none;"> The Double Chooz experiment has determined the value of the neutrino oscillation parameter $胃_{13}$ from an analysis of inverse beta decay interactions with neutron capture on hydrogen. This analysis uses a three times larger fiducial volume than the standard Double Chooz assessment, which is restricted to a region doped with gadolinium (Gd), yielding an exposure of 113.1 GW-ton-years. The data sample used in this analysis is distinct from that of the Gd analysis, and the systematic uncertainties are also largely independent, with some exceptions, such as the reactor neutrino flux prediction. A combined rate- and energy-dependent fit finds $\sin^2 2胃_{13}=0.097\pm 0.034(stat.) \pm 0.034 (syst.)$, excluding the no-oscillation hypothesis at 2.0 蟽. This result is consistent with previous measurements of $\sin^2 2胃_{13}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1301.2948v2-abstract-full').style.display = 'none'; document.getElementById('1301.2948v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 29 August, 2013; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 January, 2013; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2013. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 2 figures; published version</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Lett. B723 (2013) 66-70 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1210.3748">arXiv:1210.3748</a> <span> [<a href="https://arxiv.org/pdf/1210.3748">pdf</a>, <a href="https://arxiv.org/format/1210.3748">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.87.011102">10.1103/PhysRevD.87.011102 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Direct Measurement of Backgrounds using Reactor-Off Data in Double Chooz </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Aberle%2C+C">C. Aberle</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bernstein%2C+A">A. Bernstein</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukhov%2C+L">L. Bezrukhov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Bowden%2C+N+S">N. S. Bowden</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Caden%2C+E">E. Caden</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P+-">P. -J. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Classen%2C+T">T. Classen</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anadon%2C+J+I">J. I. Crespo-Anadon</a>, <a href="/search/hep-ex?searchtype=author&query=Crum%2C+K">K. Crum</a> , et al. (148 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1210.3748v2-abstract-short" style="display: inline;"> Double Chooz is unique among modern reactor-based neutrino experiments studying $\bar 谓_e$ disappearance in that data can be collected with all reactors off. In this paper, we present data from 7.53 days of reactor-off running. Applying the same selection criteria as used in the Double Chooz reactor-on oscillation analysis, a measured background rate of 1.0$\pm$0.4 events/day is obtained. The back… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1210.3748v2-abstract-full').style.display = 'inline'; document.getElementById('1210.3748v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1210.3748v2-abstract-full" style="display: none;"> Double Chooz is unique among modern reactor-based neutrino experiments studying $\bar 谓_e$ disappearance in that data can be collected with all reactors off. In this paper, we present data from 7.53 days of reactor-off running. Applying the same selection criteria as used in the Double Chooz reactor-on oscillation analysis, a measured background rate of 1.0$\pm$0.4 events/day is obtained. The background model for accidentals, cosmogenic $尾$-$n$-emitting isotopes, fast neutrons from cosmic muons, and stopped-$渭$ decays used in the oscillation analysis is demonstrated to be correct within the uncertainties. Kinematic distributions of the events, which are dominantly cosmic-ray-produced correlated-background events, are provided. The background rates are scaled to the shielding depths of two other reactor-based oscillation experiments, Daya Bay and RENO. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1210.3748v2-abstract-full').style.display = 'none'; document.getElementById('1210.3748v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 20 October, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 October, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> October 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">V2 has corrections to affiliations</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1209.5810">arXiv:1209.5810</a> <span> [<a href="https://arxiv.org/pdf/1209.5810">pdf</a>, <a href="https://arxiv.org/ps/1209.5810">ps</a>, <a href="https://arxiv.org/format/1209.5810">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.86.112009">10.1103/PhysRevD.86.112009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First Test of Lorentz Violation with a Reactor-based Antineutrino Experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Double+Chooz+Collaboration"> Double Chooz Collaboration</a>, <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Aberle%2C+C">C. Aberle</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bernstein%2C+A">A. Bernstein</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukhov%2C+L">L. Bezrukhov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Bowden%2C+N+S">N. S. Bowden</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Caden%2C+E">E. Caden</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P+-">P. -J. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Classen%2C+T">T. Classen</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anad%C3%B3n%2C+J+I">J. I. Crespo-Anad贸n</a>, <a href="/search/hep-ex?searchtype=author&query=Crum%2C+K">K. Crum</a> , et al. (142 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1209.5810v2-abstract-short" style="display: inline;"> We present a search for Lorentz violation with 8249 candidate electron antineutrino events taken by the Double Chooz experiment in 227.9 live days of running. This analysis, featuring a search for a sidereal time dependence of the events, is the first test of Lorentz invariance using a reactor-based antineutrino source. No sidereal variation is present in the data and the disappearance results are… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.5810v2-abstract-full').style.display = 'inline'; document.getElementById('1209.5810v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1209.5810v2-abstract-full" style="display: none;"> We present a search for Lorentz violation with 8249 candidate electron antineutrino events taken by the Double Chooz experiment in 227.9 live days of running. This analysis, featuring a search for a sidereal time dependence of the events, is the first test of Lorentz invariance using a reactor-based antineutrino source. No sidereal variation is present in the data and the disappearance results are consistent with sidereal time independent oscillations. Under the Standard-Model Extension (SME), we set the first limits on fourteen Lorentz violating coefficients associated with transitions between electron and tau flavor, and set two competitive limits associated with transitions between electron and muon flavor. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1209.5810v2-abstract-full').style.display = 'none'; document.getElementById('1209.5810v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 22 December, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 September, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 2 figures; (new version after referee's comments)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1207.6632">arXiv:1207.6632</a> <span> [<a href="https://arxiv.org/pdf/1207.6632">pdf</a>, <a href="https://arxiv.org/ps/1207.6632">ps</a>, <a href="https://arxiv.org/format/1207.6632">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Instrumentation and Detectors">physics.ins-det</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevD.86.052008">10.1103/PhysRevD.86.052008 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Reactor electron antineutrino disappearance in the Double Chooz experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Aberle%2C+C">C. Aberle</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bernstein%2C+A">A. Bernstein</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukhov%2C+L">L. Bezrukhov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Bowden%2C+N+S">N. S. Bowden</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Caden%2C+E">E. Caden</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P+-">P. -J. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Classen%2C+T">T. Classen</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a>, <a href="/search/hep-ex?searchtype=author&query=Conover%2C+E">E. Conover</a>, <a href="/search/hep-ex?searchtype=author&query=Conrad%2C+J+M">J. M. Conrad</a>, <a href="/search/hep-ex?searchtype=author&query=Crespo-Anad%C3%B3n%2C+J+I">J. I. Crespo-Anad贸n</a>, <a href="/search/hep-ex?searchtype=author&query=Crum%2C+K">K. Crum</a> , et al. (140 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1207.6632v4-abstract-short" style="display: inline;"> The Double Chooz experiment has observed 8,249 candidate electron antineutrino events in 227.93 live days with 33.71 GW-ton-years (reactor power x detector mass x livetime) exposure using a 10.3 cubic meter fiducial volume detector located at 1050 m from the reactor cores of the Chooz nuclear power plant in France. The expectation in case of theta13 = 0 is 8,937 events. The deficit is interpreted… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1207.6632v4-abstract-full').style.display = 'inline'; document.getElementById('1207.6632v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1207.6632v4-abstract-full" style="display: none;"> The Double Chooz experiment has observed 8,249 candidate electron antineutrino events in 227.93 live days with 33.71 GW-ton-years (reactor power x detector mass x livetime) exposure using a 10.3 cubic meter fiducial volume detector located at 1050 m from the reactor cores of the Chooz nuclear power plant in France. The expectation in case of theta13 = 0 is 8,937 events. The deficit is interpreted as evidence of electron antineutrino disappearance. From a rate plus spectral shape analysis we find sin^2 2胃13 = 0.109 \pm 0.030(stat) \pm 0.025(syst). The data exclude the no-oscillation hypothesis at 99.8% CL (2.9蟽). <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1207.6632v4-abstract-full').style.display = 'none'; document.getElementById('1207.6632v4-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 30 August, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 26 July, 2012; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> July 2012. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">Modified for PRD referees</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. D 86, 052008 (2012) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1112.6353">arXiv:1112.6353</a> <span> [<a href="https://arxiv.org/pdf/1112.6353">pdf</a>, <a href="https://arxiv.org/ps/1112.6353">ps</a>, <a href="https://arxiv.org/format/1112.6353">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.108.131801">10.1103/PhysRevLett.108.131801 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Indication for the disappearance of reactor electron antineutrinos in the Double Chooz experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Abe%2C+Y">Y. Abe</a>, <a href="/search/hep-ex?searchtype=author&query=Aberle%2C+C">C. Aberle</a>, <a href="/search/hep-ex?searchtype=author&query=Akiri%2C+T">T. Akiri</a>, <a href="/search/hep-ex?searchtype=author&query=Anjos%2C+J+C+d">J. C. dos Anjos</a>, <a href="/search/hep-ex?searchtype=author&query=Ardellier%2C+F">F. Ardellier</a>, <a href="/search/hep-ex?searchtype=author&query=Barbosa%2C+A+F">A. F. Barbosa</a>, <a href="/search/hep-ex?searchtype=author&query=Baxter%2C+A">A. Baxter</a>, <a href="/search/hep-ex?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a>, <a href="/search/hep-ex?searchtype=author&query=Bernstein%2C+A">A. Bernstein</a>, <a href="/search/hep-ex?searchtype=author&query=Bezerra%2C+T+J+C">T. J. C. Bezerra</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukhov%2C+L">L. Bezrukhov</a>, <a href="/search/hep-ex?searchtype=author&query=Blucher%2C+E">E. Blucher</a>, <a href="/search/hep-ex?searchtype=author&query=Bongrand%2C+M">M. Bongrand</a>, <a href="/search/hep-ex?searchtype=author&query=Bowden%2C+N+S">N. S. Bowden</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Busenitz%2C+J">J. Busenitz</a>, <a href="/search/hep-ex?searchtype=author&query=Cabrera%2C+A">A. Cabrera</a>, <a href="/search/hep-ex?searchtype=author&query=Caden%2C+E">E. Caden</a>, <a href="/search/hep-ex?searchtype=author&query=Camilleri%2C+L">L. Camilleri</a>, <a href="/search/hep-ex?searchtype=author&query=Carr%2C+R">R. Carr</a>, <a href="/search/hep-ex?searchtype=author&query=Cerrada%2C+M">M. Cerrada</a>, <a href="/search/hep-ex?searchtype=author&query=Chang%2C+P+-">P. -J. Chang</a>, <a href="/search/hep-ex?searchtype=author&query=Chimenti%2C+P">P. Chimenti</a>, <a href="/search/hep-ex?searchtype=author&query=Classen%2C+T">T. Classen</a>, <a href="/search/hep-ex?searchtype=author&query=Collin%2C+A+P">A. P. Collin</a> , et al. (160 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="1112.6353v3-abstract-short" style="display: inline;"> The Double Chooz Experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. A ratio of 0.944 $\pm$ 0.016 (stat) $\pm$ 0.040 (syst) observed to predicted events was obtained in 101 days of running at the Chooz Nuclear Power Plant in France, with two 4.25 GW$_{th}$ reactors. The results were obtained from a single 10 m$^3$ fiducial volume… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1112.6353v3-abstract-full').style.display = 'inline'; document.getElementById('1112.6353v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1112.6353v3-abstract-full" style="display: none;"> The Double Chooz Experiment presents an indication of reactor electron antineutrino disappearance consistent with neutrino oscillations. A ratio of 0.944 $\pm$ 0.016 (stat) $\pm$ 0.040 (syst) observed to predicted events was obtained in 101 days of running at the Chooz Nuclear Power Plant in France, with two 4.25 GW$_{th}$ reactors. The results were obtained from a single 10 m$^3$ fiducial volume detector located 1050 m from the two reactor cores. The reactor antineutrino flux prediction used the Bugey4 measurement as an anchor point. The deficit can be interpreted as an indication of a non-zero value of the still unmeasured neutrino mixing parameter \sang. Analyzing both the rate of the prompt positrons and their energy spectrum we find \sang = 0.086 $\pm$ 0.041 (stat) $\pm$ 0.030 (syst), or, at 90% CL, 0.015 $<$ \sang $\ <$ 0.16. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1112.6353v3-abstract-full').style.display = 'none'; document.getElementById('1112.6353v3-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 13 March, 2012; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 December, 2011; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 2011. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">7 pages, 4 figures, (new version after PRL referee's comments)</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/hep-ex/0405032">arXiv:hep-ex/0405032</a> <span> [<a href="https://arxiv.org/pdf/hep-ex/0405032">pdf</a>, <a href="https://arxiv.org/ps/hep-ex/0405032">ps</a>, <a href="https://arxiv.org/format/hep-ex/0405032">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="High Energy Physics - Experiment">hep-ex</span> </div> </div> <p class="title is-5 mathjax"> Letter of Intent for Double-CHOOZ: a Search for the Mixing Angle Theta13 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/hep-ex?searchtype=author&query=Ardellier%2C+F">F. Ardellier</a>, <a href="/search/hep-ex?searchtype=author&query=Barabanov%2C+I">I. Barabanov</a>, <a href="/search/hep-ex?searchtype=author&query=Barriere%2C+J+C">J. C. Barriere</a>, <a href="/search/hep-ex?searchtype=author&query=Bauer%2C+M">M. Bauer</a>, <a href="/search/hep-ex?searchtype=author&query=Bezrukov%2C+L">L. Bezrukov</a>, <a href="/search/hep-ex?searchtype=author&query=Buck%2C+C">C. Buck</a>, <a href="/search/hep-ex?searchtype=author&query=Cattadori%2C+C">C. Cattadori</a>, <a href="/search/hep-ex?searchtype=author&query=Courty%2C+B">B. Courty</a>, <a href="/search/hep-ex?searchtype=author&query=Cribier%2C+M">M. Cribier</a>, <a href="/search/hep-ex?searchtype=author&query=Dalnoki-Veress%2C+F">F. Dalnoki-Veress</a>, <a href="/search/hep-ex?searchtype=author&query=Danilov%2C+N">N. Danilov</a>, <a href="/search/hep-ex?searchtype=author&query=de+Kerret%2C+H">H. de Kerret</a>, <a href="/search/hep-ex?searchtype=author&query=Di+Vacri%2C+A">A. Di Vacri</a>, <a href="/search/hep-ex?searchtype=author&query=Etenko%2C+A">A. Etenko</a>, <a href="/search/hep-ex?searchtype=author&query=Fallot%2C+M">M. Fallot</a>, <a href="/search/hep-ex?searchtype=author&query=Grieb%2C+C">Ch. Grieb</a>, <a href="/search/hep-ex?searchtype=author&query=Goeger%2C+M">M. Goeger</a>, <a href="/search/hep-ex?searchtype=author&query=Guertin%2C+A">A. Guertin</a>, <a href="/search/hep-ex?searchtype=author&query=Kirchner%2C+T">T. Kirchner</a>, <a href="/search/hep-ex?searchtype=author&query=Krylov%2C+Y+S">Y. S. Krylov</a>, <a href="/search/hep-ex?searchtype=author&query=Kryn%2C+D">D. Kryn</a>, <a href="/search/hep-ex?searchtype=author&query=Hagner%2C+C">C. Hagner</a>, <a href="/search/hep-ex?searchtype=author&query=Hampel%2C+W">W. Hampel</a>, <a href="/search/hep-ex?searchtype=author&query=Hartmann%2C+F+X">F. X. Hartmann</a>, <a href="/search/hep-ex?searchtype=author&query=Huber%2C+P">P. Huber</a> , et al. (27 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="hep-ex/0405032v1-abstract-short" style="display: inline;"> Tremendous progress has been achieved in neutrino oscillation physics during the last few years. However, the smallness of the $\t13$ neutrino mixing angle still remains enigmatic. The current best constraint comes from the CHOOZ reactor neutrino experiment $\s2t13 < 0.2$ (at 90% C.L., for $\adm2=2.0 10^{-3} \text{eV}^2$). We propose a new experiment on the same site, Double-CHOOZ, to explore th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0405032v1-abstract-full').style.display = 'inline'; document.getElementById('hep-ex/0405032v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="hep-ex/0405032v1-abstract-full" style="display: none;"> Tremendous progress has been achieved in neutrino oscillation physics during the last few years. However, the smallness of the $\t13$ neutrino mixing angle still remains enigmatic. The current best constraint comes from the CHOOZ reactor neutrino experiment $\s2t13 < 0.2$ (at 90% C.L., for $\adm2=2.0 10^{-3} \text{eV}^2$). We propose a new experiment on the same site, Double-CHOOZ, to explore the range of $\s2t13$ from 0.2 to 0.03, within three years of data taking. The improvement of the CHOOZ result requires an increase in the statistics, a reduction of the systematic error below one percent, and a careful control of the cosmic ray induced background. Therefore, Double-CHOOZ will use two identical detectors, one at $\sim$150 m and another at 1.05 km distance from the nuclear cores. The plan is to start data taking with two detectors in 2008, and to reach a sensitivity of 0.05 in 2009, and 0.03 in 2011. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('hep-ex/0405032v1-abstract-full').style.display = 'none'; document.getElementById('hep-ex/0405032v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 14 May, 2004; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2004. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">102 pages, 9 chapters, 3 appendix. 43 figures</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> 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