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</div> <div class="control"> <button class="button is-small 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/2406.15422">arXiv:2406.15422</a> <span> [<a href="https://arxiv.org/pdf/2406.15422">pdf</a>, <a href="https://arxiv.org/format/2406.15422">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> <p class="title is-5 mathjax"> Fluorescence Imaging of Individual Ions and Molecules in Pressurized Noble Gases for Barium Tagging in $^{136}$Xe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=Dey%2C+E">E. Dey</a>, <a href="/search/physics?searchtype=author&query=Foss%2C+F+W">F. W. Foss</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/physics?searchtype=author&query=Madigan%2C+R">R. Madigan</a>, <a href="/search/physics?searchtype=author&query=McDonald%2C+A">A. McDonald</a>, <a href="/search/physics?searchtype=author&query=Miller%2C+R+L">R. L. Miller</a>, <a href="/search/physics?searchtype=author&query=Navarro%2C+K+E">K. E. Navarro</a>, <a href="/search/physics?searchtype=author&query=Norman%2C+L+R">L. R. Norman</a>, <a href="/search/physics?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Auria-Luna%2C+F">F. Auria-Luna</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Barcelon%2C+J+E">J. E. Barcelon</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=del+Barrio-Torregrosa%2C+M">M. del Barrio-Torregrosa</a> , et al. (90 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="2406.15422v1-abstract-short" style="display: inline;"> The imaging of individual Ba$^{2+}$ ions in high pressure xenon gas is one possible way to attain background-free sensitivity to neutrinoless double beta decay and hence establish the Majorana nature of the neutrino. In this paper we demonstrate selective single Ba$^{2+}$ ion imaging inside a high-pressure xenon gas environment. Ba$^{2+}$ ions chelated with molecular chemosensors are resolved at t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15422v1-abstract-full').style.display = 'inline'; document.getElementById('2406.15422v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2406.15422v1-abstract-full" style="display: none;"> The imaging of individual Ba$^{2+}$ ions in high pressure xenon gas is one possible way to attain background-free sensitivity to neutrinoless double beta decay and hence establish the Majorana nature of the neutrino. In this paper we demonstrate selective single Ba$^{2+}$ ion imaging inside a high-pressure xenon gas environment. Ba$^{2+}$ ions chelated with molecular chemosensors are resolved at the gas-solid interface using a diffraction-limited imaging system with scan area of 1$\times$1~cm$^2$ located inside 10~bar of xenon gas. This new form of microscopy represents an important enabling step in the development of barium tagging for neutrinoless double beta decay searches in $^{136}$Xe, as well as a new tool for studying the photophysics of fluorescent molecules and chemosensors at the solid-gas interface. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2406.15422v1-abstract-full').style.display = 'none'; document.getElementById('2406.15422v1-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 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2405.20427">arXiv:2405.20427</a> <span> [<a href="https://arxiv.org/pdf/2405.20427">pdf</a>, <a href="https://arxiv.org/format/2405.20427">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> <p class="title is-5 mathjax"> Measurement of Energy Resolution with the NEXT-White Silicon Photomultipliers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=Palmeiro%2C+B">B. Palmeiro</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=Para%2C+A">A. Para</a>, <a href="/search/physics?searchtype=author&query=Mart%C3%ADnez-Lema%2C+G">G. Mart铆nez-Lema</a>, <a href="/search/physics?searchtype=author&query=Guenette%2C+R">R. Guenette</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Auria-Luna%2C+F">F. Auria-Luna</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=del+Barrio-Torregrosa%2C+M">M. del Barrio-Torregrosa</a>, <a href="/search/physics?searchtype=author&query=Bayo%2C+A">A. Bayo</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Brodolin%2C+A">A. Brodolin</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Castillo%2C+A">A. Castillo</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="2405.20427v2-abstract-short" style="display: inline;"> The NEXT-White detector, a high-pressure gaseous xenon time projection chamber, demonstrated the excellence of this technology for future neutrinoless double beta decay searches using photomultiplier tubes (PMTs) to measure energy and silicon photomultipliers (SiPMs) to extract topology information. This analysis uses $^{83m}\text{Kr}$ data from the NEXT-White detector to measure and understand th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.20427v2-abstract-full').style.display = 'inline'; document.getElementById('2405.20427v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2405.20427v2-abstract-full" style="display: none;"> The NEXT-White detector, a high-pressure gaseous xenon time projection chamber, demonstrated the excellence of this technology for future neutrinoless double beta decay searches using photomultiplier tubes (PMTs) to measure energy and silicon photomultipliers (SiPMs) to extract topology information. This analysis uses $^{83m}\text{Kr}$ data from the NEXT-White detector to measure and understand the energy resolution that can be obtained with the SiPMs, rather than with PMTs. The energy resolution obtained of (10.9 $\pm$ 0.6) $\%$, full-width half-maximum, is slightly larger than predicted based on the photon statistics resulting from very low light detection coverage of the SiPM plane in the NEXT-White detector. The difference in the predicted and measured resolution is attributed to poor corrections, which are expected to be improved with larger statistics. Furthermore, the noise of the SiPMs is shown to not be a dominant factor in the energy resolution and may be negligible when noise subtraction is applied appropriately, for high-energy events or larger SiPM coverage detectors. These results, which are extrapolated to estimate the response of large coverage SiPM planes, are promising for the development of future, SiPM-only, readout planes that can offer imaging and achieve similar energy resolution to that previously demonstrated with PMTs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2405.20427v2-abstract-full').style.display = 'none'; document.getElementById('2405.20427v2-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 August, 2024; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 May, 2024; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2024. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.03528">arXiv:2311.03528</a> <span> [<a href="https://arxiv.org/pdf/2311.03528">pdf</a>, <a href="https://arxiv.org/format/2311.03528">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> </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/10.1088/1748-0221/19/02/P02007">10.1088/1748-0221/19/02/P02007 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Design, characterization and installation of the NEXT-100 cathode and electroluminescence regions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Mistry%2C+K">K. Mistry</a>, <a href="/search/physics?searchtype=author&query=Rogers%2C+L">L. Rogers</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/physics?searchtype=author&query=Munson%2C+B">B. Munson</a>, <a href="/search/physics?searchtype=author&query=Norman%2C+L">L. Norman</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Auria-Luna%2C+F">F. Auria-Luna</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=del+Barrio-Torregrosa%2C+M">M. del Barrio-Torregrosa</a>, <a href="/search/physics?searchtype=author&query=Bayo%2C+A">A. Bayo</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Brodolin%2C+A">A. Brodolin</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</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="2311.03528v2-abstract-short" style="display: inline;"> NEXT-100 is currently being constructed at the Laboratorio Subterr谩neo de Canfranc in the Spanish Pyrenees and will search for neutrinoless double beta decay using a high-pressure gaseous time projection chamber (TPC) with 100 kg of xenon. Charge amplification is carried out via electroluminescence (EL) which is the process of accelerating electrons in a high electric field region causing secondar… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.03528v2-abstract-full').style.display = 'inline'; document.getElementById('2311.03528v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.03528v2-abstract-full" style="display: none;"> NEXT-100 is currently being constructed at the Laboratorio Subterr谩neo de Canfranc in the Spanish Pyrenees and will search for neutrinoless double beta decay using a high-pressure gaseous time projection chamber (TPC) with 100 kg of xenon. Charge amplification is carried out via electroluminescence (EL) which is the process of accelerating electrons in a high electric field region causing secondary scintillation of the medium proportional to the initial charge. The NEXT-100 EL and cathode regions are made from tensioned hexagonal meshes of 1 m diameter. This paper describes the design, characterization, and installation of these parts for NEXT-100. Simulations of the electric field are performed to model the drift and amplification of ionization electrons produced in the detector under various EL region alignments and rotations. Measurements of the electrostatic breakdown voltage in air characterize performance under high voltage conditions and identify breakdown points. The electrostatic deflection of the mesh is quantified and fit to a first-principles mechanical model. Measurements were performed with both a standalone test EL region and with the NEXT-100 EL region before its installation in the detector. Finally, we describe the parts as installed in NEXT-100, following their deployment in Summer 2023. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.03528v2-abstract-full').style.display = 'none'; document.getElementById('2311.03528v2-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, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </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, 25 Figures, update includes accepted version in JINST</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 19 P02007 2024 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2311.03441">arXiv:2311.03441</a> <span> [<a href="https://arxiv.org/pdf/2311.03441">pdf</a>, <a href="https://arxiv.org/format/2311.03441">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> <p class="title is-5 mathjax"> Demonstration of Event Position Reconstruction based on Diffusion in the NEXT-White Detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Haefner%2C+J">J. Haefner</a>, <a href="/search/physics?searchtype=author&query=Navarro%2C+K+E">K. E. Navarro</a>, <a href="/search/physics?searchtype=author&query=Guenette%2C+R">R. Guenette</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/physics?searchtype=author&query=Tripathi%2C+A">A. Tripathi</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Auria-Luna%2C+F">F. Auria-Luna</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=del+Barrio-Torregrosa%2C+M">M. del Barrio-Torregrosa</a>, <a href="/search/physics?searchtype=author&query=Bayo%2C+A">A. Bayo</a>, <a href="/search/physics?searchtype=author&query=BenllochRodr%C3%ADguez%2C+J+M">J. M. BenllochRodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Brodolin%2C+A">A. Brodolin</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a> , et al. (86 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="2311.03441v1-abstract-short" style="display: inline;"> Noble element time projection chambers are a leading technology for rare event detection in physics, such as for dark matter and neutrinoless double beta decay searches. Time projection chambers typically assign event position in the drift direction using the relative timing of prompt scintillation and delayed charge collection signals, allowing for reconstruction of an absolute position in the dr… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.03441v1-abstract-full').style.display = 'inline'; document.getElementById('2311.03441v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2311.03441v1-abstract-full" style="display: none;"> Noble element time projection chambers are a leading technology for rare event detection in physics, such as for dark matter and neutrinoless double beta decay searches. Time projection chambers typically assign event position in the drift direction using the relative timing of prompt scintillation and delayed charge collection signals, allowing for reconstruction of an absolute position in the drift direction. In this paper, alternate methods for assigning event drift distance via quantification of electron diffusion in a pure high pressure xenon gas time projection chamber are explored. Data from the NEXT-White detector demonstrate the ability to achieve good position assignment accuracy for both high- and low-energy events. Using point-like energy deposits from $^{83\mathrm{m}}$Kr calibration electron captures ($E\sim45$keV), the position of origin of low-energy events is determined to $2~$cm precision with bias $< 1$mm. A convolutional neural network approach is then used to quantify diffusion for longer tracks (E$\geq$1.5MeV), yielding a precision of 3cm on the event barycenter. The precision achieved with these methods indicates the feasibility energy calibrations of better than 1% FWHM at Q$_{尾尾}$ in pure xenon, as well as the potential for event fiducialization in large future detectors using an alternate method that does not rely on primary scintillation. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2311.03441v1-abstract-full').style.display = 'none'; document.getElementById('2311.03441v1-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 November, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2023. </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">18 pages, 16 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/2305.09435">arXiv:2305.09435</a> <span> [<a href="https://arxiv.org/pdf/2305.09435">pdf</a>, <a href="https://arxiv.org/format/2305.09435">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/10.1007/JHEP09(2023)190">10.1007/JHEP09(2023)190 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Demonstration of neutrinoless double beta decay searches in gaseous xenon with NEXT </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Novella%2C+P">P. Novella</a>, <a href="/search/physics?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/physics?searchtype=author&query=Us%C3%B3n%2C+A">A. Us贸n</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Auria-Luna%2C+F">F. Auria-Luna</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=del+Barrio-Torregrosa%2C+M">M. del Barrio-Torregrosa</a>, <a href="/search/physics?searchtype=author&query=Bayo%2C+A">A. Bayo</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Bounasser%2C+S">S. Bounasser</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a> , et al. (90 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="2305.09435v4-abstract-short" style="display: inline;"> The NEXT experiment aims at the sensitive search of the neutrinoless double beta decay in $^{136}$Xe, using high-pressure gas electroluminescent time projection chambers. The NEXT-White detector is the first radiopure demonstrator of this technology, operated in the Laboratorio Subterr谩neo de Canfranc. Achieving an energy resolution of 1% FWHM at 2.6 MeV and further background rejection by means o… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.09435v4-abstract-full').style.display = 'inline'; document.getElementById('2305.09435v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.09435v4-abstract-full" style="display: none;"> The NEXT experiment aims at the sensitive search of the neutrinoless double beta decay in $^{136}$Xe, using high-pressure gas electroluminescent time projection chambers. The NEXT-White detector is the first radiopure demonstrator of this technology, operated in the Laboratorio Subterr谩neo de Canfranc. Achieving an energy resolution of 1% FWHM at 2.6 MeV and further background rejection by means of the topology of the reconstructed tracks, NEXT-White has been exploited beyond its original goals in order to perform a neutrinoless double beta decay search. The analysis considers the combination of 271.6 days of $^{136}$Xe-enriched data and 208.9 days of $^{136}$Xe-depleted data. A detailed background modeling and measurement has been developed, ensuring the time stability of the radiogenic and cosmogenic contributions across both data samples. Limits to the neutrinoless mode are obtained in two alternative analyses: a background-model-dependent approach and a novel direct background-subtraction technique, offering results with small dependence on the background model assumptions. With a fiducial mass of only 3.50$\pm$0.01 kg of $^{136}$Xe-enriched xenon, 90% C.L. lower limits to the neutrinoless double beta decay are found in the T$_{1/2}^{0谓}>5.5\times10^{23}-1.3\times10^{24}$ yr range, depending on the method. The presented techniques stand as a proof-of-concept for the searches to be implemented with larger NEXT detectors. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.09435v4-abstract-full').style.display = 'none'; document.getElementById('2305.09435v4-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 September, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 16 May, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 2023. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 09 (2023) 190 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2304.06091">arXiv:2304.06091</a> <span> [<a href="https://arxiv.org/pdf/2304.06091">pdf</a>, <a href="https://arxiv.org/format/2304.06091">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> </div> </div> <p class="title is-5 mathjax"> NEXT-CRAB-0: A High Pressure Gaseous Xenon Time Projection Chamber with a Direct VUV Camera Based Readout </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N+K">N. K. Byrnes</a>, <a href="/search/physics?searchtype=author&query=Parmaksiz%2C+I">I. Parmaksiz</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Asaadi%2C+J">J. Asaadi</a>, <a href="/search/physics?searchtype=author&query=Baeza-Rubio%2C+J">J Baeza-Rubio</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/physics?searchtype=author&query=Higley%2C+A">A. Higley</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/physics?searchtype=author&query=Mistry%2C+K">K. Mistry</a>, <a href="/search/physics?searchtype=author&query=Moya%2C+I+A">I. A. Moya</a>, <a href="/search/physics?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/physics?searchtype=author&query=Oyedele%2C+P">P. Oyedele</a>, <a href="/search/physics?searchtype=author&query=Rogers%2C+L">L. Rogers</a>, <a href="/search/physics?searchtype=author&query=Stogsdill%2C+K">K. Stogsdill</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a> , et al. (94 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="2304.06091v2-abstract-short" style="display: inline;"> The search for neutrinoless double beta decay ($0谓尾尾$) remains one of the most compelling experimental avenues for the discovery in the neutrino sector. Electroluminescent gas-phase time projection chambers are well suited to $0谓尾尾$ searches due to their intrinsically precise energy resolution and topological event identification capabilities. Scalability to ton- and multi-ton masses requires read… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.06091v2-abstract-full').style.display = 'inline'; document.getElementById('2304.06091v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2304.06091v2-abstract-full" style="display: none;"> The search for neutrinoless double beta decay ($0谓尾尾$) remains one of the most compelling experimental avenues for the discovery in the neutrino sector. Electroluminescent gas-phase time projection chambers are well suited to $0谓尾尾$ searches due to their intrinsically precise energy resolution and topological event identification capabilities. Scalability to ton- and multi-ton masses requires readout of large-area electroluminescent regions with fine spatial resolution, low radiogenic backgrounds, and a scalable data acquisition system. This paper presents a detector prototype that records event topology in an electroluminescent xenon gas TPC via VUV image-intensified cameras. This enables an extendable readout of large tracking planes with commercial devices that reside almost entirely outside of the active medium.Following further development in intermediate scale demonstrators, this technique may represent a novel and enlargeable method for topological event imaging in $0谓尾尾$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2304.06091v2-abstract-full').style.display = 'none'; document.getElementById('2304.06091v2-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 August, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 April, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2023. </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">30 Pages, 22 figures, Updated to match current JINST submission</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2303.01522">arXiv:2303.01522</a> <span> [<a href="https://arxiv.org/pdf/2303.01522">pdf</a>, <a href="https://arxiv.org/format/2303.01522">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/10.1088/1748-0221/18/07/P07044">10.1088/1748-0221/18/07/P07044 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Compact Dication Source for Ba$^{2+}$ Tagging and Heavy Metal Ion Sensor Development </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Navarro%2C+K+E">K. E. Navarro</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/physics?searchtype=author&query=Baeza-Rubio%2C+J">J. Baeza-Rubio</a>, <a href="/search/physics?searchtype=author&query=Boyd%2C+M">M. Boyd</a>, <a href="/search/physics?searchtype=author&query=Denisenko%2C+A+A">A. A. Denisenko</a>, <a href="/search/physics?searchtype=author&query=Foss%2C+F+W">F. W. Foss</a>, <a href="/search/physics?searchtype=author&query=Giri%2C+S">S. Giri</a>, <a href="/search/physics?searchtype=author&query=Miller%2C+R">R. Miller</a>, <a href="/search/physics?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/physics?searchtype=author&query=Tiscareno%2C+M+R">M. R. Tiscareno</a>, <a href="/search/physics?searchtype=author&query=Samaniego%2C+F+J">F. J. Samaniego</a>, <a href="/search/physics?searchtype=author&query=Stogsdill%2C+K">K. Stogsdill</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</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="2303.01522v1-abstract-short" style="display: inline;"> We present a tunable metal ion beam that delivers controllable ion currents in the picoamp range for testing of dry-phase ion sensors. Ion beams are formed by sequential atomic evaporation and single or multiple electron impact ionization, followed by acceleration into a sensing region. Controllability of the ionic charge state is achieved through tuning of electrode potentials that influence the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.01522v1-abstract-full').style.display = 'inline'; document.getElementById('2303.01522v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2303.01522v1-abstract-full" style="display: none;"> We present a tunable metal ion beam that delivers controllable ion currents in the picoamp range for testing of dry-phase ion sensors. Ion beams are formed by sequential atomic evaporation and single or multiple electron impact ionization, followed by acceleration into a sensing region. Controllability of the ionic charge state is achieved through tuning of electrode potentials that influence the retention time in the ionization region. Barium, lead, and cobalt samples have been used to test the system, with ion currents identified and quantified using a quadrupole mass analyzer. Realization of a clean $\mathrm{Ba^{2+}}$ ion beam within a bench-top system represents an important technical advance toward the development and characterization of barium tagging systems for neutrinoless double beta decay searches in xenon gas. This system also provides a testbed for investigation of novel ion sensing methodologies for environmental assay applications, with dication beams of Pb$^{2+}$ and Cd$^{2+}$ also demonstrated for this purpose. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2303.01522v1-abstract-full').style.display = 'none'; document.getElementById('2303.01522v1-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> 2 March, 2023; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2023. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2211.05024">arXiv:2211.05024</a> <span> [<a href="https://arxiv.org/pdf/2211.05024">pdf</a>, <a href="https://arxiv.org/format/2211.05024">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="Optics">physics.optics</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/10.1088/1748-0221/18/03/P03016">10.1088/1748-0221/18/03/P03016 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Reflectance and fluorescence characteristics of PTFE coated with TPB at visible, UV, and VUV as a function of thickness </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Haefner%2C+J">J. Haefner</a>, <a href="/search/physics?searchtype=author&query=Fahs%2C+A">A. Fahs</a>, <a href="/search/physics?searchtype=author&query=Ho%2C+J">J. Ho</a>, <a href="/search/physics?searchtype=author&query=Stanford%2C+C">C. Stanford</a>, <a href="/search/physics?searchtype=author&query=Guenette%2C+R">R. Guenette</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Auria-Luna%2C+F">F. Auria-Luna</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Bounasser%2C+S">S. Bounasser</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a> , et al. (78 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="2211.05024v3-abstract-short" style="display: inline;"> Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. In noble element systems, it is often coated with tetraphenyl butadiene (TPB) to allow detection of vacuum ultraviolet scintillation light. In this work this dependence is investigated for PTFE coated with TPB in air for light of wavelengths of 200~nm, 260~nm,… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.05024v3-abstract-full').style.display = 'inline'; document.getElementById('2211.05024v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2211.05024v3-abstract-full" style="display: none;"> Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. In noble element systems, it is often coated with tetraphenyl butadiene (TPB) to allow detection of vacuum ultraviolet scintillation light. In this work this dependence is investigated for PTFE coated with TPB in air for light of wavelengths of 200~nm, 260~nm, and 450~nm. The results show that TPB-coated PTFE has a reflectance of approximately 92\% for thicknesses ranging from 5~mm to 10~mm at 450~nm, with negligible variation as a function of thickness within this range. A cross-check of these results using an argon chamber supports the conclusion that the change in thickness from 5~mm to 10~mm does not affect significantly the light response at 128~nm. Our results indicate that pieces of TPB-coated PTFE thinner than the typical 10~mm can be used in particle physics detectors without compromising the light signal. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2211.05024v3-abstract-full').style.display = 'none'; document.getElementById('2211.05024v3-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 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 9 November, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2210.07625">arXiv:2210.07625</a> <span> [<a href="https://arxiv.org/pdf/2210.07625">pdf</a>, <a href="https://arxiv.org/format/2210.07625">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> <p class="title is-5 mathjax"> Measurement of the scintillation resolution in liquid xenon and its impact for future segmented calorimeters </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Romo-Luque%2C+C">C. Romo-Luque</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Herrero-Bosch%2C+V">V. Herrero-Bosch</a>, <a href="/search/physics?searchtype=author&query=Salor-Igui%C3%B1iz%2C+N">N. Salor-Igui帽iz</a>, <a href="/search/physics?searchtype=author&query=Aliaga%2C+R+J">R. J. Aliaga</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Gadea%2C+R">R. Gadea</a>, <a href="/search/physics?searchtype=author&query=Generowicz%2C+J">J. Generowicz</a>, <a href="/search/physics?searchtype=author&query=Laing%2C+A">A. Laing</a>, <a href="/search/physics?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/physics?searchtype=author&query=Querol%2C+M">M. Querol</a>, <a href="/search/physics?searchtype=author&query=Rappaport%2C+M">M. Rappaport</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+J">J. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez-Ponce%2C+J">J. Rodr铆guez-Ponce</a>, <a href="/search/physics?searchtype=author&query=Teruel-Pardo%2C+S">S. Teruel-Pardo</a>, <a href="/search/physics?searchtype=author&query=Toledo%2C+J+F">J. F. Toledo</a>, <a href="/search/physics?searchtype=author&query=Torres-Curado%2C+R">R. Torres-Curado</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</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="2210.07625v4-abstract-short" style="display: inline;"> We report on a new measurement of the energy resolution that can be attained in liquid xenon when recording only the scintillation light. Our setup is optimised to maximise light collection, and uses state-of-the-art, high-PDE, VUV-sensitive silicon photomultipliers. We find a value of 4.2% +- 0.2% FWHM at 511 keV, a result much better than previous measurements and close to the Poissonian resolut… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.07625v4-abstract-full').style.display = 'inline'; document.getElementById('2210.07625v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2210.07625v4-abstract-full" style="display: none;"> We report on a new measurement of the energy resolution that can be attained in liquid xenon when recording only the scintillation light. Our setup is optimised to maximise light collection, and uses state-of-the-art, high-PDE, VUV-sensitive silicon photomultipliers. We find a value of 4.2% +- 0.2% FWHM at 511 keV, a result much better than previous measurements and close to the Poissonian resolution that we expect in our setup (5.4% +- 0.8% FWHM at 511 keV). Our results are compatible with a null value of the intrinsic energy resolution in liquid xenon, with an upper bound of 0.4% FWHM at 95% CL at 511 keV, to be compared with 3--4% FWHM in the same region found by theoretical estimations which have been standing for the last twenty years. Our work opens new possibilities for apparatus based on liquid xenon and using scintillation only. In particular it suggests that modular scintillation detectors using liquid xenon can be very competitive as building blocks in segmented calorimeters, with applications to nuclear and particle physics as well as Positron Emission Tomography technology. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2210.07625v4-abstract-full').style.display = 'none'; document.getElementById('2210.07625v4-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> 26 January, 2023; <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> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2202.02614">arXiv:2202.02614</a> <span> [<a href="https://arxiv.org/pdf/2202.02614">pdf</a>, <a href="https://arxiv.org/ps/2202.02614">ps</a>, <a href="https://arxiv.org/format/2202.02614">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="Instrumentation and Methods for Astrophysics">astro-ph.IM</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-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/10.1103/PhysRevX.12.021005">10.1103/PhysRevX.12.021005 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Neutral Bremsstrahlung emission in xenon unveiled </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Henriques%2C+C+A+O">C. A. O. Henriques</a>, <a href="/search/physics?searchtype=author&query=Amedo%2C+P">P. Amedo</a>, <a href="/search/physics?searchtype=author&query=Teixeira%2C+J+M+R">J. M. R. Teixeira</a>, <a href="/search/physics?searchtype=author&query=Gonzalez-Diaz%2C+D">D. Gonzalez-Diaz</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Para%2C+A">A. Para</a>, <a href="/search/physics?searchtype=author&query=Martin-Albo%2C+J">J. Martin-Albo</a>, <a href="/search/physics?searchtype=author&query=Hernandez%2C+A+S">A. Saa Hernandez</a>, <a href="/search/physics?searchtype=author&query=Gomez-Cadenas%2C+J+J">J. J. Gomez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/physics?searchtype=author&query=Monteiro%2C+C+M+B">C. M. B. Monteiro</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodriguez%2C+J+M">J. M. Benlloch-Rodriguez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=Carcel%2C+S">S. Carcel</a>, <a href="/search/physics?searchtype=author&query=Carrion%2C+J+V">J. V. Carrion</a>, <a href="/search/physics?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a> , et al. (68 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="2202.02614v2-abstract-short" style="display: inline;"> We present evidence of non-excimer-based secondary scintillation in gaseous xenon, obtained using both the NEXT-White TPC and a dedicated setup. Detailed comparison with first-principle calculations allows us to assign this scintillation mechanism to neutral bremsstrahlung (NBrS), a process that has been postulated to exist in xenon that has been largely overlooked. For photon emission below 1000… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.02614v2-abstract-full').style.display = 'inline'; document.getElementById('2202.02614v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2202.02614v2-abstract-full" style="display: none;"> We present evidence of non-excimer-based secondary scintillation in gaseous xenon, obtained using both the NEXT-White TPC and a dedicated setup. Detailed comparison with first-principle calculations allows us to assign this scintillation mechanism to neutral bremsstrahlung (NBrS), a process that has been postulated to exist in xenon that has been largely overlooked. For photon emission below 1000 nm, the NBrS yield increases from about 10$^{-2}$ photon/e$^{-}$ cm$^{-1}$ bar$^{-1}$ at pressure-reduced electric field values of 50 V cm$^{-1}$ bar$^{-1}$ to above 3$\times$10$^{-1}$ photon/e$^{-}$ cm$^{-1}$ bar$^{-1}$ at 500 V cm$^{-1}$ bar$^{-1}$. Above 1.5 kV cm$^{-1}$ bar$^{-1}$, values that are typically employed for electroluminescence, it is estimated that NBrS is present with an intensity around 1 photon/e$^{-}$ cm$^{-1}$ bar$^{-1}$, which is about two orders of magnitude lower than conventional, excimer-based electroluminescence. Despite being fainter than its excimeric counterpart, our calculations reveal that NBrS causes luminous backgrounds that can interfere, in either gas or liquid phase, with the ability to distinguish and/or to precisely measure low primary-scintillation signals (S1). In particular, we show this to be the case in the "buffer" and "veto" regions, where keeping the electric field below the electroluminescence (EL) threshold will not suffice to extinguish secondary scintillation. The electric field in these regions should be chosen carefully to avoid intolerable levels of NBrS emission. Furthermore, we show that this new source of light emission opens up a viable path towards obtaining S2 signals for discrimination purposes in future single-phase liquid TPCs for neutrino and dark matter physics, with estimated yields up to 20-50 photons/e$^{-}$ cm$^{-1}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2202.02614v2-abstract-full').style.display = 'none'; document.getElementById('2202.02614v2-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 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 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">Comments:</span> <span class="has-text-grey-dark mathjax">Published in Physical Review X</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. X 12, 021005 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2201.09099">arXiv:2201.09099</a> <span> [<a href="https://arxiv.org/pdf/2201.09099">pdf</a>, <a href="https://arxiv.org/format/2201.09099">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="Materials Science">cond-mat.mtrl-sci</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Chemical Physics">physics.chem-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/10.1038/s41467-022-35153-0">10.1038/s41467-022-35153-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Ba$^{2+}$ ion trapping by organic submonolayer: towards an ultra-low background neutrinoless double beta decay detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Herrero-G%C3%B3mez%2C+P">P. Herrero-G贸mez</a>, <a href="/search/physics?searchtype=author&query=Calupitan%2C+J+P">J. P. Calupitan</a>, <a href="/search/physics?searchtype=author&query=Ilyn%2C+M">M. Ilyn</a>, <a href="/search/physics?searchtype=author&query=Berdonces-Layunta%2C+A">A. Berdonces-Layunta</a>, <a href="/search/physics?searchtype=author&query=Wang%2C+T">T. Wang</a>, <a href="/search/physics?searchtype=author&query=de+Oteyza%2C+D+G">D. G. de Oteyza</a>, <a href="/search/physics?searchtype=author&query=Corso%2C+M">M. Corso</a>, <a href="/search/physics?searchtype=author&query=Gonz%C3%A1lez-Moreno%2C+R">R. Gonz谩lez-Moreno</a>, <a href="/search/physics?searchtype=author&query=Rivilla%2C+I">I. Rivilla</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Freixa%2C+Z">Z. Freixa</a>, <a href="/search/physics?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/physics?searchtype=author&query=Coss%C3%ADo%2C+F+P">F. P. Coss铆o</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Rogero%2C+C">C. Rogero</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a> , et al. (90 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="2201.09099v1-abstract-short" style="display: inline;"> If neutrinos are their own antiparticles, the otherwise-forbidden nuclear reaction known as neutrinoless double beta decay ($尾尾0谓$) can occur, with a characteristic lifetime which is expected to be very long, making the suppression of backgrounds a daunting task. It has been shown that detecting (``tagging'') the Ba$^{+2}$ dication produced in the double beta decay… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.09099v1-abstract-full').style.display = 'inline'; document.getElementById('2201.09099v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2201.09099v1-abstract-full" style="display: none;"> If neutrinos are their own antiparticles, the otherwise-forbidden nuclear reaction known as neutrinoless double beta decay ($尾尾0谓$) can occur, with a characteristic lifetime which is expected to be very long, making the suppression of backgrounds a daunting task. It has been shown that detecting (``tagging'') the Ba$^{+2}$ dication produced in the double beta decay ${}^{136}\mathrm{Xe} \rightarrow {}^{136}$Ba$^{+2}+ 2 e + (2 谓)$ in a high pressure gas experiment, could lead to a virtually background free experiment. To identify these \Bapp, chemical sensors are being explored as a key tool by the NEXT collaboration . Although used in many fields, the application of such chemosensors to the field of particle physics is totally novel and requires experimental demonstration of their suitability in the ultra-dry environment of a xenon gas chamber. Here we use a combination of complementary surface science techniques to unambiguously show that Ba$^{+2}$ ions can be trapped (chelated) in vacuum by an organic molecule, the so-called fluorescent bicolour indicator (FBI) (one of the chemosensors developed by NEXT), immobilized on a surface. We unravel the ion capture mechanism once the molecules are immobilised on Au(111) surface and explain the origin of the emission fluorescence shift associated to the trapping of different ions. Moreover, we prove that chelation also takes place on a technologically relevant substrate, as such, demonstrating the feasibility of using FBI indicators as building blocks of a Ba$^{+2}$ detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2201.09099v1-abstract-full').style.display = 'none'; document.getElementById('2201.09099v1-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 January, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2022. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2111.11091">arXiv:2111.11091</a> <span> [<a href="https://arxiv.org/pdf/2111.11091">pdf</a>, <a href="https://arxiv.org/format/2111.11091">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.105.055501">10.1103/PhysRevC.105.055501 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Measurement of the ${}^{136}$Xe two-neutrino double beta decay half-life via direct background subtraction in NEXT </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Novella%2C+P">P. Novella</a>, <a href="/search/physics?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/physics?searchtype=author&query=Us%C3%B3n%2C+A">A. Us贸n</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Bounasser%2C+S">S. Bounasser</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</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="2111.11091v3-abstract-short" style="display: inline;"> We report a measurement of the half-life of the ${}^{136}$Xe two-neutrino double beta decay performed with a novel direct background subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with ${}^{136}$Xe-enriched and ${}^{136}$Xe-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.11091v3-abstract-full').style.display = 'inline'; document.getElementById('2111.11091v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2111.11091v3-abstract-full" style="display: none;"> We report a measurement of the half-life of the ${}^{136}$Xe two-neutrino double beta decay performed with a novel direct background subtraction technique. The analysis relies on the data collected with the NEXT-White detector operated with ${}^{136}$Xe-enriched and ${}^{136}$Xe-depleted xenon, as well as on the topology of double-electron tracks. With a fiducial mass of only 3.5 kg of Xe, a half-life of $2.34^{+0.80}_{-0.46}\textrm{(stat)}^{+0.30}_{-0.17}\textrm{(sys)}\times10^{21}~\textrm{yr}$ is derived from the background-subtracted energy spectrum. The presented technique demonstrates the feasibility of unique background-model-independent neutrinoless double beta decay searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2111.11091v3-abstract-full').style.display = 'none'; document.getElementById('2111.11091v3-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> 11 May, 2022; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 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">9 pages, 7 figures, and 1 appendix</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 105, 055501 (2022) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.12899">arXiv:2109.12899</a> <span> [<a href="https://arxiv.org/pdf/2109.12899">pdf</a>, <a href="https://arxiv.org/format/2109.12899">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="Medical Physics">physics.med-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/10.1088/1748-0221/17/05/P05044">10.1088/1748-0221/17/05/P05044 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Monte Carlo characterization of PETALO, a full-body liquid xenon-based PET detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Renner%2C+J">J. Renner</a>, <a href="/search/physics?searchtype=author&query=Romo-Luque%2C+C">C. Romo-Luque</a>, <a href="/search/physics?searchtype=author&query=Aliaga%2C+R+J">R. J. Aliaga</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cubero%2C+D">D. Cubero</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Gadea%2C+R">R. Gadea</a>, <a href="/search/physics?searchtype=author&query=Gillam%2C+J">J. Gillam</a>, <a href="/search/physics?searchtype=author&query=Generowicz%2C+J">J. Generowicz</a>, <a href="/search/physics?searchtype=author&query=L%C3%B3pez-G%C3%B3mez%2C+J+L">J. L. L贸pez-G贸mez</a>, <a href="/search/physics?searchtype=author&query=Mart%C3%ADnez%2C+A">A. Mart铆nez</a>, <a href="/search/physics?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/physics?searchtype=author&query=Querol%2C+M">M. Querol</a>, <a href="/search/physics?searchtype=author&query=Rappaport%2C+M">M. Rappaport</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+J">J. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez-Ponce%2C+J">J. Rodr铆guez-Ponce</a>, <a href="/search/physics?searchtype=author&query=Solevi%2C+P">P. Solevi</a>, <a href="/search/physics?searchtype=author&query=Teruel-Pardo%2C+S">S. Teruel-Pardo</a>, <a href="/search/physics?searchtype=author&query=Toledo%2C+J+F">J. F. Toledo</a>, <a href="/search/physics?searchtype=author&query=Torres-Curado%2C+R">R. Torres-Curado</a>, <a href="/search/physics?searchtype=author&query=Herrero-Bosch%2C+V">V. Herrero-Bosch</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="2109.12899v6-abstract-short" style="display: inline;"> New detector approaches in Positron Emission Tomography imaging will play an important role in reducing costs, lowering administered radiation doses, and improving overall performance. PETALO employs liquid xenon as the active scintillating medium and UV-sensitive silicon photomultipliers for scintillation readout. The scintillation time in liquid xenon is fast enough to register time-of-flight in… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.12899v6-abstract-full').style.display = 'inline'; document.getElementById('2109.12899v6-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.12899v6-abstract-full" style="display: none;"> New detector approaches in Positron Emission Tomography imaging will play an important role in reducing costs, lowering administered radiation doses, and improving overall performance. PETALO employs liquid xenon as the active scintillating medium and UV-sensitive silicon photomultipliers for scintillation readout. The scintillation time in liquid xenon is fast enough to register time-of-flight information for each detected coincidence, and sufficient scintillation is produced with low enough fluctuations to obtain good energy resolution. The present simulation study examines a full-body-sized PETALO detector and evaluates its potential performance in PET image reconstruction. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.12899v6-abstract-full').style.display = 'none'; document.getElementById('2109.12899v6-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> 11 January, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 27 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2021. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 17 (2022) P05044 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2109.05902">arXiv:2109.05902</a> <span> [<a href="https://arxiv.org/pdf/2109.05902">pdf</a>, <a href="https://arxiv.org/format/2109.05902">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="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> The Dynamics of Ions on Phased Radio-frequency Carpets in High Pressure Gases and Application for Barium Tagging in Xenon Gas Time Projection Chambers </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/physics?searchtype=author&query=Raymond%2C+A">A. Raymond</a>, <a href="/search/physics?searchtype=author&query=Woodruff%2C+K">K. Woodruff</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=Denisenko%2C+A+A">A. A. Denisenko</a>, <a href="/search/physics?searchtype=author&query=Foss%2C+F+W">F. W. Foss</a>, <a href="/search/physics?searchtype=author&query=Navarro%2C+K">K. Navarro</a>, <a href="/search/physics?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/physics?searchtype=author&query=Vuong%2C+T+T">T. T. Vuong</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Ayet%2C+S">S. Ayet</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Bounasser%2C+S">S. Bounasser</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</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="2109.05902v2-abstract-short" style="display: inline;"> Radio-frequency (RF) carpets with ultra-fine pitches are examined for ion transport in gases at atmospheric pressures and above. We develop new analytic and computational methods for modeling RF ion transport at densities where dynamics are strongly influenced by buffer gas collisions. An analytic description of levitating and sweeping forces from phased arrays is obtained, then thermodynamic and… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.05902v2-abstract-full').style.display = 'inline'; document.getElementById('2109.05902v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2109.05902v2-abstract-full" style="display: none;"> Radio-frequency (RF) carpets with ultra-fine pitches are examined for ion transport in gases at atmospheric pressures and above. We develop new analytic and computational methods for modeling RF ion transport at densities where dynamics are strongly influenced by buffer gas collisions. An analytic description of levitating and sweeping forces from phased arrays is obtained, then thermodynamic and kinetic principles are used to calculate ion loss rates in the presence of collisions. This methodology is validated against detailed microscopic SIMION simulations. We then explore a parameter space of special interest for neutrinoless double beta decay experiments: transport of barium ions in xenon at pressures from 1 to 10 bar. Our computations account for molecular ion formation and pressure dependent mobility as well as finite temperature effects. We discuss the challenges associated with achieving suitable operating conditions, which lie beyond the capabilities of existing devices, using presently available or near-future manufacturing techniques. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2109.05902v2-abstract-full').style.display = 'none'; document.getElementById('2109.05902v2-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 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 September, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 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">26 pages, 16 figures v2: author list update and pre-journal submission adjustments</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2103.02874">arXiv:2103.02874</a> <span> [<a href="https://arxiv.org/pdf/2103.02874">pdf</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Medical Physics">physics.med-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/10.1088/1361-6560/abebfd">10.1088/1361-6560/abebfd <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A study of Type B uncertainties associated with the photoelectric effect in low-energy Monte Carlo simulations </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Valdes-Cortez%2C+C">Christian Valdes-Cortez</a>, <a href="/search/physics?searchtype=author&query=Mansour%2C+I">Iymad Mansour</a>, <a href="/search/physics?searchtype=author&query=Rivard%2C+M+J">Mark J. Rivard</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">Facundo Ballester</a>, <a href="/search/physics?searchtype=author&query=Mainegra-Hing%2C+E">Ernesto Mainegra-Hing</a>, <a href="/search/physics?searchtype=author&query=Thomson%2C+R+M">Rowan M. Thomson</a>, <a href="/search/physics?searchtype=author&query=Vijande%2C+J">Javier Vijande</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="2103.02874v1-abstract-short" style="display: inline;"> The goal of this manuscript is to estimate Type B uncertainties in absorbed-dose calculations arising from the different implementations in current state-of-the-art Monte Carlo codes of low-energy photon cross-sections (<200 keV). Monte Carlo simulations are carried out using three codes widely used in the low-energy domain: PENELOPE-2018, EGSnrc, and MCNP. Mass energy-absorption coefficients for… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.02874v1-abstract-full').style.display = 'inline'; document.getElementById('2103.02874v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2103.02874v1-abstract-full" style="display: none;"> The goal of this manuscript is to estimate Type B uncertainties in absorbed-dose calculations arising from the different implementations in current state-of-the-art Monte Carlo codes of low-energy photon cross-sections (<200 keV). Monte Carlo simulations are carried out using three codes widely used in the low-energy domain: PENELOPE-2018, EGSnrc, and MCNP. Mass energy-absorption coefficients for water, air, graphite, and their respective ratios; absorbed dose; and photon-fluence spectra are considered. Benchmark simulations using similar cross-sections have been performed. The differences observed between these quantities when different cross-sections are considered are taken to be a good estimator for the corresponding Type B uncertainties. A conservative Type B uncertainty for the absorbed dose (k=2) of 1.2%-1.7% (<50 keV), 0.6%-1.2% (50-100 keV), and 0.3% (100-200 keV) is estimated. The photon-fluence spectrum does not present clinically relevant differences that merit considering additional Type B uncertainties except for energies below 25 keV, where a Type B uncertainty of 0.5% is obtained. Below 30 keV, mass energy-absorption coefficients show Type B uncertainties (k=2) of about 1.5% (water and air), and 2% (graphite), reaching values about 1% (40-50 keV) and 0.5% (50-75 keV). Type B uncertainties for the water-to-graphite ratios are observed for energies below 30 keV, about 0.7% (k=2). In contrast with the intermediate (about 500 keV) or high (about 1 MeV) energy domains, Type B uncertainties due to the different cross-sections implementation cannot be considered subdominant with respect to Type A uncertainties or even to other sources of Type B uncertainties. Therefore, the values reported here should be accommodated within the uncertainty budget in low-energy photon dosimetry studies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2103.02874v1-abstract-full').style.display = 'none'; document.getElementById('2103.02874v1-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 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">To be published in Physics in Medicine and Biology</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2102.11931">arXiv:2102.11931</a> <span> [<a href="https://arxiv.org/pdf/2102.11931">pdf</a>, <a href="https://arxiv.org/format/2102.11931">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/JHEP07(2021)146">10.1007/JHEP07(2021)146 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Boosting background suppression in the NEXT experiment through Richardson-Lucy deconvolution </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Sim%C3%B3n%2C+A">A. Sim贸n</a>, <a href="/search/physics?searchtype=author&query=Ifergan%2C+Y">Y. Ifergan</a>, <a href="/search/physics?searchtype=author&query=Redwine%2C+A+B">A. B. Redwine</a>, <a href="/search/physics?searchtype=author&query=Weiss-Babai%2C+R">R. Weiss-Babai</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Almaz%C3%A1n%2C+H">H. Almaz谩n</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Aparicio%2C+B">B. Aparicio</a>, <a href="/search/physics?searchtype=author&query=Aranburu%2C+A+I">A. I. Aranburu</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=Coss%C3%ADo%2C+F+P">F. P. Coss铆o</a>, <a href="/search/physics?searchtype=author&query=Denisenko%2C+A+A">A. A. Denisenko</a> , et al. (78 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="2102.11931v3-abstract-short" style="display: inline;"> Next-generation neutrinoless double beta decay experiments aim for half-life sensitivities of ~$10^{27}$ yr, requiring suppressing backgrounds to <1 count/tonne/yr. For this, any extra background rejection handle, beyond excellent energy resolution and the use of extremely radiopure materials, is of utmost importance. The NEXT experiment exploits differences in the spatial ionization patterns of d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.11931v3-abstract-full').style.display = 'inline'; document.getElementById('2102.11931v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2102.11931v3-abstract-full" style="display: none;"> Next-generation neutrinoless double beta decay experiments aim for half-life sensitivities of ~$10^{27}$ yr, requiring suppressing backgrounds to <1 count/tonne/yr. For this, any extra background rejection handle, beyond excellent energy resolution and the use of extremely radiopure materials, is of utmost importance. The NEXT experiment exploits differences in the spatial ionization patterns of double beta decay and single-electron events to discriminate signal from background. While the former display two Bragg peak dense ionization regions at the opposite ends of the track, the latter typically have only one such feature. Thus, comparing the energies at the track extremes provides an additional rejection tool. The unique combination of the topology-based background discrimination and excellent energy resolution (1% FWHM at the Q-value of the decay) is the distinguishing feature of NEXT. Previous studies demonstrated a topological background rejection factor of ~5 when reconstructing electron-positron pairs in the $^{208}$Tl 1.6 MeV double escape peak (with Compton events as background), recorded in the NEXT-White demonstrator at the Laboratorio Subterr谩neo de Canfranc, with 72% signal efficiency. This was recently improved through the use of a deep convolutional neural network to yield a background rejection factor of ~10 with 65% signal efficiency. Here, we present a new reconstruction method, based on the Richardson-Lucy deconvolution algorithm, which allows reversing the blurring induced by electron diffusion and electroluminescence light production in the NEXT TPC. The new method yields highly refined 3D images of reconstructed events, and, as a result, significantly improves the topological background discrimination. When applied to real-data 1.6 MeV $e^-e^+$ pairs, it leads to a background rejection factor of 27 at 57% signal efficiency. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2102.11931v3-abstract-full').style.display = 'none'; document.getElementById('2102.11931v3-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 May, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 23 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 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">Submitted to JHEP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Journal of High Energy Physics 2021, 146 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.10055">arXiv:2101.10055</a> <span> [<a href="https://arxiv.org/pdf/2101.10055">pdf</a>, <a href="https://arxiv.org/format/2101.10055">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> </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/10.1109/NSSMIC.2018.8824293">10.1109/NSSMIC.2018.8824293 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> PETALO read-out: A novel approach for data acquisition systems in PET applications </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Herrero-Bosch%2C+V">V. Herrero-Bosch</a>, <a href="/search/physics?searchtype=author&query=Gadea%2C+R">R. Gadea</a>, <a href="/search/physics?searchtype=author&query=Aliaga%2C+R+J">R. J. Aliaga</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+J">J. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Toledo%2C+J+F">J. F. Toledo</a>, <a href="/search/physics?searchtype=author&query=Torres-Curado%2C+R">R. Torres-Curado</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</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="2101.10055v2-abstract-short" style="display: inline;"> PETALO (a Positron Emission Tof Apparatus based on Liquid xenOn) is a new approach for Positron Emission Tomography scanners, based on liquid xenon. The PETALO detector aims at capturing the light produced by the scintillation in LXe taking advantage of its uniform response and continuity. This strategy will lead to a geometrical distortion free behavior compared to other PET detectors. To this en… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.10055v2-abstract-full').style.display = 'inline'; document.getElementById('2101.10055v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.10055v2-abstract-full" style="display: none;"> PETALO (a Positron Emission Tof Apparatus based on Liquid xenOn) is a new approach for Positron Emission Tomography scanners, based on liquid xenon. The PETALO detector aims at capturing the light produced by the scintillation in LXe taking advantage of its uniform response and continuity. This strategy will lead to a geometrical distortion free behavior compared to other PET detectors. To this end, the sensors chosen for the light readout are SiPMs, which provide large area, high gain and very low noise. In order to take advantage of the unique PETALO detector characteristics a read-out architecture must be designed to meet the following specifications: Electronics associated to detector (front-end and read-out itself) must be fully expandable in terms of detector size. Read-out scheme must be compatible with the non-segmented structure of the detector. Time of Flight (TOF) capabilities must be assured at the scanner level, that is to say front-end and read-out electronics should not degrade LXe time performance. In these proceedings, a new readout concept is introduced which is compatible with a fully continuous medium detector such as PETALO. Results show that the system is feasible, with the introduction of a fast compression technique to further reduce the data bandwidth requirements. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.10055v2-abstract-full').style.display = 'none'; document.getElementById('2101.10055v2-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> 1 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 25 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2021. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2101.05269">arXiv:2101.05269</a> <span> [<a href="https://arxiv.org/pdf/2101.05269">pdf</a>, <a href="https://arxiv.org/format/2101.05269">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 Methods for Astrophysics">astro-ph.IM</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> <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/10.3847/1538-4357/abf7c4">10.3847/1538-4357/abf7c4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Supernova Model Discrimination with Hyper-Kamiokande </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Collaboration%2C+H">Hyper-Kamiokande Collaboration</a>, <a href="/search/physics?searchtype=author&query=%3A"> :</a>, <a href="/search/physics?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/physics?searchtype=author&query=Adrich%2C+P">P. Adrich</a>, <a href="/search/physics?searchtype=author&query=Aihara%2C+H">H. Aihara</a>, <a href="/search/physics?searchtype=author&query=Akutsu%2C+R">R. Akutsu</a>, <a href="/search/physics?searchtype=author&query=Alekseev%2C+I">I. Alekseev</a>, <a href="/search/physics?searchtype=author&query=Ali%2C+A">A. Ali</a>, <a href="/search/physics?searchtype=author&query=Ameli%2C+F">F. Ameli</a>, <a href="/search/physics?searchtype=author&query=Anghel%2C+I">I. Anghel</a>, <a href="/search/physics?searchtype=author&query=Anthony%2C+L+H+V">L. H. V. Anthony</a>, <a href="/search/physics?searchtype=author&query=Antonova%2C+M">M. Antonova</a>, <a href="/search/physics?searchtype=author&query=Araya%2C+A">A. Araya</a>, <a href="/search/physics?searchtype=author&query=Asaoka%2C+Y">Y. Asaoka</a>, <a href="/search/physics?searchtype=author&query=Ashida%2C+Y">Y. Ashida</a>, <a href="/search/physics?searchtype=author&query=Aushev%2C+V">V. Aushev</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Bandac%2C+I">I. Bandac</a>, <a href="/search/physics?searchtype=author&query=Barbi%2C+M">M. Barbi</a>, <a href="/search/physics?searchtype=author&query=Barker%2C+G+J">G. J. Barker</a>, <a href="/search/physics?searchtype=author&query=Barr%2C+G">G. Barr</a>, <a href="/search/physics?searchtype=author&query=Batkiewicz-Kwasniak%2C+M">M. Batkiewicz-Kwasniak</a>, <a href="/search/physics?searchtype=author&query=Bellato%2C+M">M. Bellato</a>, <a href="/search/physics?searchtype=author&query=Berardi%2C+V">V. Berardi</a>, <a href="/search/physics?searchtype=author&query=Bergevin%2C+M">M. Bergevin</a> , et al. (478 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="2101.05269v2-abstract-short" style="display: inline;"> Core-collapse supernovae are among the most magnificent events in the observable universe. They produce many of the chemical elements necessary for life to exist and their remnants -- neutron stars and black holes -- are interesting astrophysical objects in their own right. However, despite millennia of observations and almost a century of astrophysical study, the explosion mechanism of core-colla… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.05269v2-abstract-full').style.display = 'inline'; document.getElementById('2101.05269v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2101.05269v2-abstract-full" style="display: none;"> Core-collapse supernovae are among the most magnificent events in the observable universe. They produce many of the chemical elements necessary for life to exist and their remnants -- neutron stars and black holes -- are interesting astrophysical objects in their own right. However, despite millennia of observations and almost a century of astrophysical study, the explosion mechanism of core-collapse supernovae is not yet well understood. Hyper-Kamiokande is a next-generation neutrino detector that will be able to observe the neutrino flux from the next galactic core-collapse supernova in unprecedented detail. We focus on the first 500 ms of the neutrino burst, corresponding to the accretion phase, and use a newly-developed, high-precision supernova event generator to simulate Hyper-Kamiokande's response to five different supernova models. We show that Hyper-Kamiokande will be able to distinguish between these models with high accuracy for a supernova at a distance of up to 100 kpc. Once the next galactic supernova happens, this ability will be a powerful tool for guiding simulations towards a precise reproduction of the explosion mechanism observed in nature. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2101.05269v2-abstract-full').style.display = 'none'; document.getElementById('2101.05269v2-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 July, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 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">21 pages, 7 figures. Article based on thesis published as arXiv:2002.01649. v2: added references and some explanations in response to reviewer comments</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Astrophys.J. 916 (2021) 15 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2009.10783">arXiv:2009.10783</a> <span> [<a href="https://arxiv.org/pdf/2009.10783">pdf</a>, <a href="https://arxiv.org/format/2009.10783">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/JHEP01(2021)189">10.1007/JHEP01(2021)189 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Demonstration of background rejection using deep convolutional neural networks in the NEXT experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Kekic%2C+M">M. Kekic</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Woodruff%2C+K">K. Woodruff</a>, <a href="/search/physics?searchtype=author&query=Renner%2C+J">J. Renner</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Del+Tutto%2C+M">M. Del Tutto</a>, <a href="/search/physics?searchtype=author&query=Morata%2C+J+A+H">J. A. Hernando Morata</a>, <a href="/search/physics?searchtype=author&query=Gomez-Cadenas%2C+J+J">J. J. Gomez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodriguez%2C+J+M">J. M. Benlloch-Rodriguez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=Carcel%2C+S">S. Carcel</a>, <a href="/search/physics?searchtype=author&query=Carrion%2C+J+V">J. V. Carrion</a>, <a href="/search/physics?searchtype=author&query=Cebrian%2C+S">S. Cebrian</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=Diaz%2C+G">G. Diaz</a>, <a href="/search/physics?searchtype=author&query=Diaz%2C+J">J. Diaz</a> , et al. (66 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="2009.10783v2-abstract-short" style="display: inline;"> Convolutional neural networks (CNNs) are widely used state-of-the-art computer vision tools that are becoming increasingly popular in high energy physics. In this paper, we attempt to understand the potential of CNNs for event classification in the NEXT experiment, which will search for neutrinoless double-beta decay in $^{136}$Xe. To do so, we demonstrate the usage of CNNs for the identification… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.10783v2-abstract-full').style.display = 'inline'; document.getElementById('2009.10783v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2009.10783v2-abstract-full" style="display: none;"> Convolutional neural networks (CNNs) are widely used state-of-the-art computer vision tools that are becoming increasingly popular in high energy physics. In this paper, we attempt to understand the potential of CNNs for event classification in the NEXT experiment, which will search for neutrinoless double-beta decay in $^{136}$Xe. To do so, we demonstrate the usage of CNNs for the identification of electron-positron pair production events, which exhibit a topology similar to that of a neutrinoless double-beta decay event. These events were produced in the NEXT-White high-pressure xenon TPC using 2.6-MeV gamma rays from a $^{228}$Th calibration source. We train a network on Monte Carlo-simulated events and show that, by applying on-the-fly data augmentation, the network can be made robust against differences between simulation and data. The use of CNNs offer significant improvement in signal efficiency/background rejection when compared to previous non-CNN-based analyses. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2009.10783v2-abstract-full').style.display = 'none'; document.getElementById('2009.10783v2-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 January, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 22 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">19 pages, 10 figures; version matches published JHEP version</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2007.06626">arXiv:2007.06626</a> <span> [<a href="https://arxiv.org/pdf/2007.06626">pdf</a>, <a href="https://arxiv.org/format/2007.06626">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> </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/10.1088/1748-0221/15/11/P11031">10.1088/1748-0221/15/11/P11031 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Dependence of polytetrafluoroethylene reflectance on thickness at visible and ultraviolet wavelengths in air </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Ghosh%2C+S">S. Ghosh</a>, <a href="/search/physics?searchtype=author&query=Haefner%2C+J">J. Haefner</a>, <a href="/search/physics?searchtype=author&query=Mart%C3%ADn-Albo%2C+J">J. Mart铆n-Albo</a>, <a href="/search/physics?searchtype=author&query=Guenette%2C+R">R. Guenette</a>, <a href="/search/physics?searchtype=author&query=Li%2C+X">X. Li</a>, <a href="/search/physics?searchtype=author&query=Villalpando%2C+A+A+L">A. A. Loya Villalpando</a>, <a href="/search/physics?searchtype=author&query=Burch%2C+C">C. Burch</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a> , et al. (66 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="2007.06626v2-abstract-short" style="display: inline;"> Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. However, the reflectance of PTFE is a function of its thickness. In this work, we investigate this dependence in air for light of wavelengths 260 nm and 450 nm using two complementary methods. We find that PTFE reflectance for thicknesses from 5 mm to 10 mm ran… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.06626v2-abstract-full').style.display = 'inline'; document.getElementById('2007.06626v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2007.06626v2-abstract-full" style="display: none;"> Polytetrafluoroethylene (PTFE) is an excellent diffuse reflector widely used in light collection systems for particle physics experiments. However, the reflectance of PTFE is a function of its thickness. In this work, we investigate this dependence in air for light of wavelengths 260 nm and 450 nm using two complementary methods. We find that PTFE reflectance for thicknesses from 5 mm to 10 mm ranges from 92.5% to 94.5% at 450 nm, and from 90.0% to 92.0% at 260 nm. We also see that the reflectance of PTFE of a given thickness can vary by as much as 2.7% within the same piece of material. Finally, we show that placing a specular reflector behind the PTFE can recover the loss of reflectance in the visible without introducing a specular component in the reflectance. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2007.06626v2-abstract-full').style.display = 'none'; document.getElementById('2007.06626v2-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 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 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">Comments:</span> <span class="has-text-grey-dark mathjax">17 pages, 10 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/2006.07320">arXiv:2006.07320</a> <span> [<a href="https://arxiv.org/pdf/2006.07320">pdf</a>, <a href="https://arxiv.org/format/2006.07320">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/10.1007/JHEP02(2021)203">10.1007/JHEP02(2021)203 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Sensitivity of the NEXT experiment to Xe-124 double electron capture </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mart%C3%ADnez-Lema%2C+G">G. Mart铆nez-Lema</a>, <a href="/search/physics?searchtype=author&query=Mart%C3%ADnez-Vara%2C+M">M. Mart铆nez-Vara</a>, <a href="/search/physics?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Alvarez%2C+V">V. Alvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/physics?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Felkai%2C+R">R. Felkai</a> , et al. (66 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="2006.07320v3-abstract-short" style="display: inline;"> Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite different, potentially providing a new channel to measure the hypothesized neutrinoless mode of these decays. The Standard-Model-allowed two-neutrino double electron capture ($2谓ECEC$) has been predicted for a number of isotopes, b… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.07320v3-abstract-full').style.display = 'inline'; document.getElementById('2006.07320v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2006.07320v3-abstract-full" style="display: none;"> Double electron capture by proton-rich nuclei is a second-order nuclear process analogous to double beta decay. Despite their similarities, the decay signature is quite different, potentially providing a new channel to measure the hypothesized neutrinoless mode of these decays. The Standard-Model-allowed two-neutrino double electron capture ($2谓ECEC$) has been predicted for a number of isotopes, but only observed in $^{78}$Kr, $^{130}$Ba and, recently, $^{124}$Xe. The sensitivity to this decay establishes a benchmark for the ultimate experimental goal, namely the potential to discover also the lepton-number-violating neutrinoless version of this process, $0谓ECEC$. Here we report on the current sensitivity of the NEXT-White detector to $^{124}$Xe $2谓ECEC$ and on the extrapolation to NEXT-100. Using simulated data for the $2谓ECEC$ signal and real data from NEXT-White operated with $^{124}$Xe-depleted gas as background, we define an optimal event selection that maximizes the NEXT-White sensitivity. We estimate that, for NEXT-100 operated with xenon gas isotopically enriched with 1 kg of $^{124}$Xe and for a 5-year run, a sensitivity to the $2谓ECEC$ half-life of $6 \times 10^{22}$ y (at 90% confidence level) or better can be reached. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2006.07320v3-abstract-full').style.display = 'none'; document.getElementById('2006.07320v3-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 March, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 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">23 pages, 13 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. High Energ. Phys. 2021, 203 (2021) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2005.06467">arXiv:2005.06467</a> <span> [<a href="https://arxiv.org/pdf/2005.06467">pdf</a>, <a href="https://arxiv.org/format/2005.06467">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="Nuclear Experiment">nucl-ex</span> </div> </div> <p class="title is-5 mathjax"> Sensitivity of a tonne-scale NEXT detector for neutrinoless double beta decay searches </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=Denisenko%2C+A+A">A. A. Denisenko</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Felkai%2C+R">R. Felkai</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a> , et al. (74 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="2005.06467v2-abstract-short" style="display: inline;"> The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta decay of Xe-136 using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of neutrinoless double-beta decay decay better than 1E27 years, imp… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.06467v2-abstract-full').style.display = 'inline'; document.getElementById('2005.06467v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2005.06467v2-abstract-full" style="display: none;"> The Neutrino Experiment with a Xenon TPC (NEXT) searches for the neutrinoless double-beta decay of Xe-136 using high-pressure xenon gas TPCs with electroluminescent amplification. A scaled-up version of this technology with about 1 tonne of enriched xenon could reach in less than 5 years of operation a sensitivity to the half-life of neutrinoless double-beta decay decay better than 1E27 years, improving the current limits by at least one order of magnitude. This prediction is based on a well-understood background model dominated by radiogenic sources. The detector concept presented here represents a first step on a compelling path towards sensitivity to the parameter space defined by the inverted ordering of neutrino masses, and beyond. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2005.06467v2-abstract-full').style.display = 'none'; document.getElementById('2005.06467v2-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 February, 2021; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 13 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> May 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">22 pages, 11 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/2001.11147">arXiv:2001.11147</a> <span> [<a href="https://arxiv.org/pdf/2001.11147">pdf</a>, <a href="https://arxiv.org/format/2001.11147">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/10.1088/1361-6471/ab8915">10.1088/1361-6471/ab8915 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Mitigation of Backgrounds from Cosmogenic $^{137}$Xe in Xenon Gas Experiments using $^{3}$He Neutron Capture </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Rogers%2C+L">L. Rogers</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/physics?searchtype=author&query=Laing%2C+A">A. Laing</a>, <a href="/search/physics?searchtype=author&query=Pingulkar%2C+S">S. Pingulkar</a>, <a href="/search/physics?searchtype=author&query=Woodruff%2C+K">K. Woodruff</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/physics?searchtype=author&query=Dingler%2C+R">R. Dingler</a> , et al. (67 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="2001.11147v2-abstract-short" style="display: inline;"> \Xe{136} is used as the target medium for many experiments searching for \bbnonu. Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutrons causing activation of detector materials. A potential background that is difficult to veto using muon tagging comes in the form of \Xe{137} created by the capture of neutrons on \Xe{136}. This isotope decays via beta… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.11147v2-abstract-full').style.display = 'inline'; document.getElementById('2001.11147v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2001.11147v2-abstract-full" style="display: none;"> \Xe{136} is used as the target medium for many experiments searching for \bbnonu. Despite underground operation, cosmic muons that reach the laboratory can produce spallation neutrons causing activation of detector materials. A potential background that is difficult to veto using muon tagging comes in the form of \Xe{137} created by the capture of neutrons on \Xe{136}. This isotope decays via beta decay with a half-life of 3.8 minutes and a \Qb\ of $\sim$4.16 MeV. This work proposes and explores the concept of adding a small percentage of \He{3} to xenon as a means to capture thermal neutrons and reduce the number of activations in the detector volume. When using this technique we find the contamination from \Xe{137} activation can be reduced to negligible levels in tonne and multi-tonne scale high pressure gas xenon neutrinoless double beta decay experiments running at any depth in an underground laboratory. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2001.11147v2-abstract-full').style.display = 'none'; document.getElementById('2001.11147v2-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> 27 May, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 29 January, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> January 2020. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1909.05860">arXiv:1909.05860</a> <span> [<a href="https://arxiv.org/pdf/1909.05860">pdf</a>, <a href="https://arxiv.org/format/1909.05860">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="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/10.1088/1748-0221/15/04/P04022">10.1088/1748-0221/15/04/P04022 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Radio Frequency and DC High Voltage Breakdown of High Pressure Helium, Argon, and Xenon </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Woodruff%2C+K">K. Woodruff</a>, <a href="/search/physics?searchtype=author&query=Baeza-Rubio%2C+J">J. Baeza-Rubio</a>, <a href="/search/physics?searchtype=author&query=Huerta%2C+D">D. Huerta</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/physics?searchtype=author&query=McDonald%2C+A+D">A. D. McDonald</a>, <a href="/search/physics?searchtype=author&query=Norman%2C+L">L. Norman</a>, <a href="/search/physics?searchtype=author&query=Nygren%2C+D+R">D. R. Nygren</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N+K">N. K. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=Denisenko%2C+A+A">A. A. Denisenko</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a> , et al. (69 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="1909.05860v3-abstract-short" style="display: inline;"> Motivated by the possibility of guiding daughter ions from double beta decay events to single-ion sensors for barium tagging, the NEXT collaboration is developing a program of R&D to test radio frequency (RF) carpets for ion transport in high pressure xenon gas. This would require carpet functionality in regimes at higher pressures than have been previously reported, implying correspondingly large… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.05860v3-abstract-full').style.display = 'inline'; document.getElementById('1909.05860v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1909.05860v3-abstract-full" style="display: none;"> Motivated by the possibility of guiding daughter ions from double beta decay events to single-ion sensors for barium tagging, the NEXT collaboration is developing a program of R&D to test radio frequency (RF) carpets for ion transport in high pressure xenon gas. This would require carpet functionality in regimes at higher pressures than have been previously reported, implying correspondingly larger electrode voltages than in existing systems. This mode of operation appears plausible for contemporary RF-carpet geometries due to the higher predicted breakdown strength of high pressure xenon relative to low pressure helium, the working medium in most existing RF carpet devices. In this paper we present the first measurements of the high voltage dielectric strength of xenon gas at high pressure and at the relevant RF frequencies for ion transport (in the 10 MHz range), as well as new DC and RF measurements of the dielectric strengths of high pressure argon and helium gases at small gap sizes. We find breakdown voltages that are compatible with stable RF carpet operation given the gas, pressure, voltage, materials and geometry of interest. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1909.05860v3-abstract-full').style.display = 'none'; document.getElementById('1909.05860v3-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 April, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1906.03984">arXiv:1906.03984</a> <span> [<a href="https://arxiv.org/pdf/1906.03984">pdf</a>, <a href="https://arxiv.org/format/1906.03984">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="Applied Physics">physics.app-ph</span> </div> </div> <p class="title is-5 mathjax"> Low-diffusion Xe-He gas mixtures for rare-event detection: Electroluminescence Yield </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Fernandes%2C+A+F+M">A. F. M. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Henriques%2C+C+A+O">C. A. O. Henriques</a>, <a href="/search/physics?searchtype=author&query=Mano%2C+R+D+P">R. D. P. Mano</a>, <a href="/search/physics?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Silva%2C+P+A+O+C">P. A. O. C. Silva</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Monteiro%2C+C+M+B">C. M. B. Monteiro</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carr%C3%ADon%2C+J+V">J. V. Carr铆on</a>, <a href="/search/physics?searchtype=author&query=Cebr%C3%ADan%2C+S">S. Cebr铆an</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a> , et al. (66 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="1906.03984v3-abstract-short" style="display: inline;"> High pressure xenon Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification are being proposed for rare event detection such as directional dark matter, double electron capture and double beta decay detection. The discrimination of the rare event through the topological signature of primary ionisation trails is a major asset for this type of TPC w… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.03984v3-abstract-full').style.display = 'inline'; document.getElementById('1906.03984v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1906.03984v3-abstract-full" style="display: none;"> High pressure xenon Time Projection Chambers (TPC) based on secondary scintillation (electroluminescence) signal amplification are being proposed for rare event detection such as directional dark matter, double electron capture and double beta decay detection. The discrimination of the rare event through the topological signature of primary ionisation trails is a major asset for this type of TPC when compared to single liquid or double-phase TPCs, limited mainly by the high electron diffusion in pure xenon. Helium admixtures with xenon can be an attractive solution to reduce the electron diffusion significantly, improving the discrimination efficiency of these optical TPCs. We have measured the electroluminescence (EL) yield of Xe-He mixtures, in the range of 0 to 30% He and demonstrated the small impact on the EL yield of the addition of helium to pure xenon. For a typical reduced electric field of 2.5 kV/cm/bar in the scintillation region, the EL yield is lowered by ~ 2%, 3%, 6% and 10% for 10%, 15%, 20% and 30% of helium concentration, respectively. This decrease is less than what has been obtained from the most recent simulation framework in the literature. The impact of the addition of helium on EL statistical fluctuations is negligible, within the experimental uncertainties. The present results are an important benchmark for the simulation tools to be applied to future optical TPCs based on Xe-He mixtures. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1906.03984v3-abstract-full').style.display = 'none'; document.getElementById('1906.03984v3-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> 26 November, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> June 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.13625">arXiv:1905.13625</a> <span> [<a href="https://arxiv.org/pdf/1905.13625">pdf</a>, <a href="https://arxiv.org/format/1905.13625">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(2019)051">10.1007/JHEP10(2019)051 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Radiogenic backgrounds in the NEXT double beta decay experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Novella%2C+P">P. Novella</a>, <a href="/search/physics?searchtype=author&query=Palmeiro%2C+B">B. Palmeiro</a>, <a href="/search/physics?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/physics?searchtype=author&query=Us%C3%B3n%2C+A">A. Us贸n</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=L%C3%B3pez%2C+G+D">G. D铆az L贸pez</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a> , et al. (66 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="1905.13625v3-abstract-short" style="display: inline;"> Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity-induced backgrounds are measured with the NEXT-White detector. Data from 37.9 days of low-background operations at the Laboratorio Subterr谩neo de Canfranc with xenon depleted in $^{136}$Xe are analyzed to derive a total background rate of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.13625v3-abstract-full').style.display = 'inline'; document.getElementById('1905.13625v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.13625v3-abstract-full" style="display: none;"> Natural radioactivity represents one of the main backgrounds in the search for neutrinoless double beta decay. Within the NEXT physics program, the radioactivity-induced backgrounds are measured with the NEXT-White detector. Data from 37.9 days of low-background operations at the Laboratorio Subterr谩neo de Canfranc with xenon depleted in $^{136}$Xe are analyzed to derive a total background rate of (0.84$\pm$0.02) mHz above 1000 keV. The comparison of data samples with and without the use of the radon abatement system demonstrates that the contribution of airborne-Rn is negligible. A radiogenic background model is built upon the extensive radiopurity screening campaign conducted by the NEXT Collaboration. A spectral fit to this model yields the specific contributions of $^{60}$Co, $^{40}$K, $^{214}$Bi and $^{208}$Tl to the total background rate, as well as their location in the detector volumes. The results are used to evaluate the impact of the radiogenic backgrounds in the double beta decay analyses, after the application of topological cuts that reduce the total rate to (0.25$\pm$0.01) mHz. Based on the best-fit background model, the NEXT-White median sensitivity to the two-neutrino double beta decay is found to be 3.5$蟽$ after 1 year of data taking. The background measurement in a Q$_{尾尾}\pm$100 keV energy window validates the best-fit background model also for the neutrinoless double beta decay search with NEXT-100. Only one event is found, while the model expectation is (0.75$\pm$0.12) events. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.13625v3-abstract-full').style.display = 'none'; document.getElementById('1905.13625v3-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, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 31 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">Journal ref:</span> JHEP 10 (2019) 51 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.13141">arXiv:1905.13141</a> <span> [<a href="https://arxiv.org/pdf/1905.13141">pdf</a>, <a href="https://arxiv.org/format/1905.13141">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(2019)052">10.1007/JHEP10(2019)052 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Demonstration of the event identification capabilities of the NEXT-White detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=L%C3%B3pez%2C+G+D">G. D铆az L贸pez</a>, <a href="/search/physics?searchtype=author&query=Morata%2C+J+A+H">J. A. Hernando Morata</a>, <a href="/search/physics?searchtype=author&query=Kekic%2C+M">M. Kekic</a>, <a href="/search/physics?searchtype=author&query=Renner%2C+J">J. Renner</a>, <a href="/search/physics?searchtype=author&query=Us%C3%B3n%2C+A">A. Us贸n</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a> , et al. (66 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="1905.13141v3-abstract-short" style="display: inline;"> In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity of the experiment. In this paper we present the first measurement of the efficiency of a cut based on the different event signatures of double and single electron tracks, using the dat… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.13141v3-abstract-full').style.display = 'inline'; document.getElementById('1905.13141v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.13141v3-abstract-full" style="display: none;"> In experiments searching for neutrinoless double-beta decay, the possibility of identifying the two emitted electrons is a powerful tool in rejecting background events and therefore improving the overall sensitivity of the experiment. In this paper we present the first measurement of the efficiency of a cut based on the different event signatures of double and single electron tracks, using the data of the NEXT-White detector, the first detector of the NEXT experiment operating underground. Using a \TO\ calibration source to produce signal-like and background-like events with energies near 1.6 MeV, a signal efficiency of $71.6 \pm 1.5_{\textrm{ stat}} \pm 0.3_{\textrm{ sys}} \%$ for a background acceptance of $20.6 \pm 0.4_{\textrm{ stat}} \pm 0.3_{\textrm{ sys}} \%$ is found, in good agreement with Monte Carlo simulations. An extrapolation to the energy region of the neutrinoless double beta decay by means of Monte Carlo simulations is also carried out, and the results obtained show an improvement in background rejection over those obtained at lower energies. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.13141v3-abstract-full').style.display = 'none'; document.getElementById('1905.13141v3-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> 11 September, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 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">Accepted by JHEP</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1905.13110">arXiv:1905.13110</a> <span> [<a href="https://arxiv.org/pdf/1905.13110">pdf</a>, <a href="https://arxiv.org/format/1905.13110">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> </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(2019)230">10.1007/JHEP10(2019)230 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Energy calibration of the NEXT-White detector with 1% resolution near Q$_{尾尾}$ of $^{136}$Xe </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Renner%2C+J">J. Renner</a>, <a href="/search/physics?searchtype=author&query=L%C3%B3pez%2C+G+D">G. D铆az L贸pez</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Morata%2C+J+A+H">J. A. Hernando Morata</a>, <a href="/search/physics?searchtype=author&query=Kekic%2C+M">M. Kekic</a>, <a href="/search/physics?searchtype=author&query=Mart%C3%ADnez-Lema%2C+G">G. Mart铆nez-Lema</a>, <a href="/search/physics?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Byrnes%2C+N">N. Byrnes</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=Contreras%2C+T">T. Contreras</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a> , et al. (65 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="1905.13110v3-abstract-short" style="display: inline;"> Excellent energy resolution is one of the primary advantages of electroluminescent high pressure xenon TPCs, and searches for rare physics events such as neutrinoless double-beta decay ($尾\beta0谓$) require precise energy measurements. Using the NEXT-White detector, developed by the NEXT (Neutrino Experiment with a Xenon TPC) collaboration, we show for the first time that an energy resolution of 1%… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.13110v3-abstract-full').style.display = 'inline'; document.getElementById('1905.13110v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1905.13110v3-abstract-full" style="display: none;"> Excellent energy resolution is one of the primary advantages of electroluminescent high pressure xenon TPCs, and searches for rare physics events such as neutrinoless double-beta decay ($尾\beta0谓$) require precise energy measurements. Using the NEXT-White detector, developed by the NEXT (Neutrino Experiment with a Xenon TPC) collaboration, we show for the first time that an energy resolution of 1% FWHM can be achieved at 2.6 MeV, establishing the present technology as the one with the best energy resolution of all xenon detectors for $尾\beta0谓$ searches. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1905.13110v3-abstract-full').style.display = 'none'; document.getElementById('1905.13110v3-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, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 30 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">13 pages, 7 figures; accepted to JHEP</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JHEP 2019:230 (2019) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1902.05544">arXiv:1902.05544</a> <span> [<a href="https://arxiv.org/pdf/1902.05544">pdf</a>, <a href="https://arxiv.org/format/1902.05544">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="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/10.1088/1748-0221/14/08/P08009">10.1088/1748-0221/14/08/P08009 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electron Drift and Longitudinal Diffusion in High Pressure Xenon-Helium Gas Mixtures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=McDonald%2C+A+D">A. D. McDonald</a>, <a href="/search/physics?searchtype=author&query=Woodruff%2C+K">K. Woodruff</a>, <a href="/search/physics?searchtype=author&query=Atoum%2C+B+A">B. Al Atoum</a>, <a href="/search/physics?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/physics?searchtype=author&query=Jones%2C+B+J+P">B. J. P. Jones</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Arnquist%2C+I+J">I. J. Arnquist</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Church%2C+E">E. Church</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+G">G. D铆az</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/physics?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Felkai%2C+R">R. Felkai</a> , et al. (61 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="1902.05544v4-abstract-short" style="display: inline;"> We report new measurements of the drift velocity and longitudinal diffusion coefficients of electrons in pure xenon gas and in xenon-helium gas mixtures at 1-9 bar and electric field strengths of 50-300 V/cm. In pure xenon we find excellent agreement with world data at all $E/P$, for both drift velocity and diffusion coefficients. However, a larger value of the longitudinal diffusion coefficient t… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.05544v4-abstract-full').style.display = 'inline'; document.getElementById('1902.05544v4-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1902.05544v4-abstract-full" style="display: none;"> We report new measurements of the drift velocity and longitudinal diffusion coefficients of electrons in pure xenon gas and in xenon-helium gas mixtures at 1-9 bar and electric field strengths of 50-300 V/cm. In pure xenon we find excellent agreement with world data at all $E/P$, for both drift velocity and diffusion coefficients. However, a larger value of the longitudinal diffusion coefficient than theoretical predictions is found at low $E/P$ in pure xenon, below the range of reduced fields usually probed by TPC experiments. A similar effect is observed in xenon-helium gas mixtures at somewhat larger $E/P$. Drift velocities in xenon-helium mixtures are found to be theoretically well predicted. Although longitudinal diffusion in xenon-helium mixtures is found to be larger than anticipated, extrapolation based on the measured longitudinal diffusion coefficients suggest that the use of helium additives to reduce transverse diffusion in xenon gas remains a promising prospect. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1902.05544v4-abstract-full').style.display = 'none'; document.getElementById('1902.05544v4-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> 26 June, 2019; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 14 February, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2019. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1812.05521">arXiv:1812.05521</a> <span> [<a href="https://arxiv.org/pdf/1812.05521">pdf</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> </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.2018.07.020">10.1016/j.nima.2018.07.020 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Study of the loss of Xenon Scintillation in Xenon-Trimethylamine Mixtures </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Trindade%2C+A+M+F">A. M. F. Trindade</a>, <a href="/search/physics?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/physics?searchtype=author&query=Cortez%2C+A+F+V">A. F. V. Cortez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Santos%2C+F+P">F. P. Santos</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carr%C3%ADon%2C+J+V">J. V. Carr铆on</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Felkai%2C+R">R. Felkai</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Ferreira%2C+A+L">A. L. Ferreira</a>, <a href="/search/physics?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/physics?searchtype=author&query=Goldschmidt%2C+A">A. Goldschmidt</a> , et al. (53 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="1812.05521v1-abstract-short" style="display: inline;"> This work investigates the capability of TMA ((CH3)3N) molecules to shift the wavelength of Xe VUV emission (160-188 nm) to a longer, more manageable, wavelength (260-350 nm). Light emitted from a Xe lamp was passed through a gas chamber filled with Xe-TMA mixtures at 800 Torr and detected with a photomultiplier tube. Using bandpass filters in the proper transmission ranges, no reemitted light was… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.05521v1-abstract-full').style.display = 'inline'; document.getElementById('1812.05521v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1812.05521v1-abstract-full" style="display: none;"> This work investigates the capability of TMA ((CH3)3N) molecules to shift the wavelength of Xe VUV emission (160-188 nm) to a longer, more manageable, wavelength (260-350 nm). Light emitted from a Xe lamp was passed through a gas chamber filled with Xe-TMA mixtures at 800 Torr and detected with a photomultiplier tube. Using bandpass filters in the proper transmission ranges, no reemitted light was observed experimentally. Considering the detection limit of the experimental system, if reemission by TMA molecules occurs, it is below 0.3% of the scintillation absorbed in the 160-188 nm range. An absorption coefficient value for xenon VUV light by TMA of 0.43+/-0.03 cm-1.Torr-1 was also obtained. These results can be especially important for experiments considering TMA as a molecular additive to Xe in large volume optical time projection chambers. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1812.05521v1-abstract-full').style.display = 'none'; document.getElementById('1812.05521v1-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 December, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> December 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">13 pages, 9 figures, 2 tables</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> NIM A 905 (2018) 22-28 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1808.01804">arXiv:1808.01804</a> <span> [<a href="https://arxiv.org/pdf/1808.01804">pdf</a>, <a href="https://arxiv.org/format/1808.01804">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> </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/10.1088/1748-0221/13/10/P10020">10.1088/1748-0221/13/10/P10020 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Initial results on energy resolution of the NEXT-White detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Renner%2C+J">J. Renner</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Mart%C3%ADnez-Lema%2C+G">G. Mart铆nez-Lema</a>, <a href="/search/physics?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/physics?searchtype=author&query=Para%2C+A">A. Para</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/physics?searchtype=author&query=Escada%2C+J">J. Escada</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Felkai%2C+R">R. Felkai</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+A+F+M">A. F. M. Fernandes</a> , et al. (55 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="1808.01804v2-abstract-short" style="display: inline;"> One of the major goals of the NEXT-White (NEW) detector is to demonstrate the energy resolution that an electroluminescent high pressure xenon TPC can achieve for high energy tracks. For this purpose, energy calibrations with 137Cs and 232Th sources have been carried out as a part of the long run taken with the detector during most of 2017. This paper describes the initial results obtained with th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.01804v2-abstract-full').style.display = 'inline'; document.getElementById('1808.01804v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1808.01804v2-abstract-full" style="display: none;"> One of the major goals of the NEXT-White (NEW) detector is to demonstrate the energy resolution that an electroluminescent high pressure xenon TPC can achieve for high energy tracks. For this purpose, energy calibrations with 137Cs and 232Th sources have been carried out as a part of the long run taken with the detector during most of 2017. This paper describes the initial results obtained with those calibrations, showing excellent linearity and an energy resolution that extrapolates to approximately 1% FWHM at Q$_{尾尾}$. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1808.01804v2-abstract-full').style.display = 'none'; document.getElementById('1808.01804v2-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 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 6 August, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> August 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">14 pages, 8 figures, Accepted for publication in JINST</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> JINST 13, P10020 (2018) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1806.05891">arXiv:1806.05891</a> <span> [<a href="https://arxiv.org/pdf/1806.05891">pdf</a>, <a href="https://arxiv.org/format/1806.05891">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/JHEP01(2019)027">10.1007/JHEP01(2019)027 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Electroluminescence TPCs at the thermal diffusion limit </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Henriques%2C+C+A+O">C. A. O. Henriques</a>, <a href="/search/physics?searchtype=author&query=Monteiro%2C+C+M+B">C. M. B. Monteiro</a>, <a href="/search/physics?searchtype=author&query=Gonz%C3%A1lez-D%C3%ADaz%2C+D">D. Gonz谩lez-D铆az</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Freitas%2C+E+D+C">E. D. C. Freitas</a>, <a href="/search/physics?searchtype=author&query=Mano%2C+R+D+P">R. D. P. Mano</a>, <a href="/search/physics?searchtype=author&query=Jorge%2C+M+R">M. R. Jorge</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+A+F+M">A. F. M. Fernandes</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Fernandes%2C+L+M+P">L. M. P. Fernandes</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/physics?searchtype=author&query=Escada%2C+J">J. Escada</a> , et al. (56 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="1806.05891v2-abstract-short" style="display: inline;"> The NEXT experiment aims at searching for the hypothetical neutrinoless double-beta decay from the ${}^{136}$Xe isotope using a high-purity xenon TPC. Efficient discrimination of the events through pattern recognition of the topology of primary ionisation tracks is a major requirement for the experiment. However, it is limited by the diffusion of electrons. It is known that the addition of a small… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.05891v2-abstract-full').style.display = 'inline'; document.getElementById('1806.05891v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1806.05891v2-abstract-full" style="display: none;"> The NEXT experiment aims at searching for the hypothetical neutrinoless double-beta decay from the ${}^{136}$Xe isotope using a high-purity xenon TPC. Efficient discrimination of the events through pattern recognition of the topology of primary ionisation tracks is a major requirement for the experiment. However, it is limited by the diffusion of electrons. It is known that the addition of a small fraction of a molecular gas to xenon reduces electron diffusion. On the other hand, the electroluminescence (EL) yield drops and the achievable energy resolution may be compromised. We have studied the effect of adding several molecular gases to xenon (CO${}_{2}$, CH${}_{4}$ and CF${}_{4}$) on the EL yield and energy resolution obtained in a small prototype of driftless gas proportional scintillation counter. We have compared our results on the scintillation characteristics (EL yield and energy resolution) with a microscopic simulation, obtaining the diffusion coefficients in those conditions as well. Accordingly, electron diffusion may be reduced from about 10 mm/$\sqrt{\mathrm{m}}$ for pure xenon down to 2.5 mm/$\sqrt{\mathrm{m}}$ using additive concentrations of about 0.05%, 0.2% and 0.02% for CO${}_{2}$, CH${}_{4}$ and CF${}_{4}$, respectively. Our results show that CF${}_{4}$ admixtures present the highest EL yield in those conditions, but very poor energy resolution as a result of huge fluctuations observed in the EL formation. CH${}_{4}$ presents the best energy resolution despite the EL yield being the lowest. The results obtained with xenon admixtures are extrapolated to the operational conditions of the NEXT-100 TPC. CO${}_{2}$ and CH${}_{4}$ show potential as molecular additives in a large xenon TPC, CH${}_{4}$ showing the best performance and stability to be used in the NEXT-100 TPC, with an extrapolated energy resolution of 0.4% at 2.45 MeV for concentrations below 0.4%. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1806.05891v2-abstract-full').style.display = 'none'; document.getElementById('1806.05891v2-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 October, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 15 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">Comments:</span> <span class="has-text-grey-dark mathjax">22 pages, 8 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">MSC Class:</span> 85-05 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.02409">arXiv:1804.02409</a> <span> [<a href="https://arxiv.org/pdf/1804.02409">pdf</a>, <a href="https://arxiv.org/format/1804.02409">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> </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/10.1088/1748-0221/13/12/P12010">10.1088/1748-0221/13/12/P12010 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> The Next White (NEW) detector </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Toledo%2C+J+F">J. F. Toledo</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Esteve%2C+R">R. Esteve</a>, <a href="/search/physics?searchtype=author&query=Felkai%2C+R">R. Felkai</a>, <a href="/search/physics?searchtype=author&query=Herrero%2C+V">V. Herrero</a>, <a href="/search/physics?searchtype=author&query=Laing%2C+A">A. Laing</a>, <a href="/search/physics?searchtype=author&query=Mart%C3%ADnez%2C+A">A. Mart铆nez</a>, <a href="/search/physics?searchtype=author&query=Musti%2C+M">M. Musti</a>, <a href="/search/physics?searchtype=author&query=Querol%2C+M">M. Querol</a>, <a href="/search/physics?searchtype=author&query=Rodr%C3%ADguez%2C+J">J. Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Sim%C3%B3n%2C+A">A. Sim贸n</a>, <a href="/search/physics?searchtype=author&query=Sofka%2C+C">C. Sofka</a>, <a href="/search/physics?searchtype=author&query=Torrent%2C+J">J. Torrent</a>, <a href="/search/physics?searchtype=author&query=Webb%2C+R">R. Webb</a>, <a href="/search/physics?searchtype=author&query=White%2C+J+T">J. T. White</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a> , et al. (50 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="1804.02409v1-abstract-short" style="display: inline;"> Conceived to host 5 kg of xenon at a pressure of 15 bar in the fiducial volume, the NEXT- White (NEW) apparatus is currently the largest high pressure xenon gas TPC using electroluminescent amplification in the world. It is also a 1:2 scale model of the NEXT-100 detector scheduled to start searching for $尾尾0谓$ decays in 136Xe in 2019. Both detectors measure the energy of the event using a plane of… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.02409v1-abstract-full').style.display = 'inline'; document.getElementById('1804.02409v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.02409v1-abstract-full" style="display: none;"> Conceived to host 5 kg of xenon at a pressure of 15 bar in the fiducial volume, the NEXT- White (NEW) apparatus is currently the largest high pressure xenon gas TPC using electroluminescent amplification in the world. It is also a 1:2 scale model of the NEXT-100 detector scheduled to start searching for $尾尾0谓$ decays in 136Xe in 2019. Both detectors measure the energy of the event using a plane of photomultipliers located behind a transparent cathode. They can also reconstruct the trajectories of charged tracks in the dense gas of the TPC with the help of a plane of silicon photomultipliers located behind the anode. A sophisticated gas system, common to both detectors, allows the high gas purity needed to guarantee a long electron lifetime. NEXT-White has been operating since October 2017 at the Canfranc Underground Laboratory (LSC), in Spain. This paper describes the detector and associated infrastructures. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.02409v1-abstract-full').style.display = 'none'; document.getElementById('1804.02409v1-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 April, 2018; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2018. </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1804.01780">arXiv:1804.01780</a> <span> [<a href="https://arxiv.org/pdf/1804.01780">pdf</a>, <a href="https://arxiv.org/format/1804.01780">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/10.1088/1748-0221/13/10/P10014">10.1088/1748-0221/13/10/P10014 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Calibration of the NEXT-White detector using $^{83m}\mathrm{Kr}$ decays </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=Mart%C3%ADnez-Lema%2C+G">G. Mart铆nez-Lema</a>, <a href="/search/physics?searchtype=author&query=Morata%2C+J+A+H">J. A. Hernando Morata</a>, <a href="/search/physics?searchtype=author&query=Palmeiro%2C+B">B. Palmeiro</a>, <a href="/search/physics?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/physics?searchtype=author&query=Laing%2C+A">A. Laing</a>, <a href="/search/physics?searchtype=author&query=Renner%2C+J">J. Renner</a>, <a href="/search/physics?searchtype=author&query=Sim%C3%B3n%2C+A">A. Sim贸n</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R. Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Diesburg%2C+M">M. Diesburg</a>, <a href="/search/physics?searchtype=author&query=Escada%2C+J">J. Escada</a> , et al. (52 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="1804.01780v5-abstract-short" style="display: inline;"> The NEXT-White (NEW) detector is currently the largest radio-pure high-pressure xenon gas time projection chamber with electroluminescent readout in the world. NEXT-White has been operating at Laboratorio Subterr谩neo de Canfranc (LSC) since October 2016. This paper describes the calibrations performed with $^{83m}\mathrm{Kr}$ decays during a long run taken from March to November 2017 (Run II). Kry… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.01780v5-abstract-full').style.display = 'inline'; document.getElementById('1804.01780v5-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.01780v5-abstract-full" style="display: none;"> The NEXT-White (NEW) detector is currently the largest radio-pure high-pressure xenon gas time projection chamber with electroluminescent readout in the world. NEXT-White has been operating at Laboratorio Subterr谩neo de Canfranc (LSC) since October 2016. This paper describes the calibrations performed with $^{83m}\mathrm{Kr}$ decays during a long run taken from March to November 2017 (Run II). Krypton calibrations are used to correct for the finite drift-electron lifetime as well as for the dependence of the measured energy on the event position which is mainly caused by variations in solid angle coverage. After producing calibration maps to correct for both effects we measure an excellent energy resolution for 41.5 keV point-like deposits of (4.553 $\pm$ 0.010 (stat.) $\pm$ 0.324 (sys.)) % FWHM in the full chamber and (3.804 $\pm$ 0.013 (stat.) $\pm$ 0.112 (sys.)) % FWHM in a restricted fiducial volume. Using naive 1/$\sqrt{E}$ scaling, these values translate into resolutions of (0.516 $\pm$ 0.0014 (stat.) $\pm$ 0.0421 (sys.)) % FWHM and (0.4943 $\pm$ 0.0017 (stat.) $\pm$ 0.0146 (sys.)) % FWHM at the $Q_{尾尾}$ energy of xenon double beta decay (2458 keV), well within range of our target value of 1%. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.01780v5-abstract-full').style.display = 'none'; document.getElementById('1804.01780v5-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 September, 2018; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 5 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">20 pages, 18 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/1804.00471">arXiv:1804.00471</a> <span> [<a href="https://arxiv.org/pdf/1804.00471">pdf</a>, <a href="https://arxiv.org/format/1804.00471">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> <p class="title is-5 mathjax"> Measurement of radon-induced backgrounds in the NEXT double beta decay experiment </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/physics?searchtype=author&query=NEXT+Collaboration"> NEXT Collaboration</a>, <a href="/search/physics?searchtype=author&query=Novella%2C+P">P. Novella</a>, <a href="/search/physics?searchtype=author&query=Palmeiro%2C+B">B. Palmeiro</a>, <a href="/search/physics?searchtype=author&query=Sim%C3%B3n%2C+A">A. Sim贸n</a>, <a href="/search/physics?searchtype=author&query=Sorel%2C+M">M. Sorel</a>, <a href="/search/physics?searchtype=author&query=Adams%2C+C">C. Adams</a>, <a href="/search/physics?searchtype=author&query=Ferrario%2C+P">P. Ferrario</a>, <a href="/search/physics?searchtype=author&query=Mart%C3%ADnez-Lema%2C+G">G. Mart铆nez-Lema</a>, <a href="/search/physics?searchtype=author&query=Monrabal%2C+F">F. Monrabal</a>, <a href="/search/physics?searchtype=author&query=Zuzel%2C+G">G. Zuzel</a>, <a href="/search/physics?searchtype=author&query=G%C3%B3mez-Cadenas%2C+J+J">J. J. G贸mez-Cadenas</a>, <a href="/search/physics?searchtype=author&query=%C3%81lvarez%2C+V">V. 脕lvarez</a>, <a href="/search/physics?searchtype=author&query=Arazi%2C+L">L. Arazi</a>, <a href="/search/physics?searchtype=author&query=Azevedo%2C+C+D+R">C. D. R Azevedo</a>, <a href="/search/physics?searchtype=author&query=Bailey%2C+K">K. Bailey</a>, <a href="/search/physics?searchtype=author&query=Ballester%2C+F">F. Ballester</a>, <a href="/search/physics?searchtype=author&query=Benlloch-Rodr%C3%ADguez%2C+J+M">J. M. Benlloch-Rodr铆guez</a>, <a href="/search/physics?searchtype=author&query=Borges%2C+F+I+G+M">F. I. G. M. Borges</a>, <a href="/search/physics?searchtype=author&query=Botas%2C+A">A. Botas</a>, <a href="/search/physics?searchtype=author&query=C%C3%A1rcel%2C+S">S. C谩rcel</a>, <a href="/search/physics?searchtype=author&query=Carri%C3%B3n%2C+J+V">J. V. Carri贸n</a>, <a href="/search/physics?searchtype=author&query=Cebri%C3%A1n%2C+S">S. Cebri谩n</a>, <a href="/search/physics?searchtype=author&query=Conde%2C+C+A+N">C. A. N. Conde</a>, <a href="/search/physics?searchtype=author&query=D%C3%ADaz%2C+J">J. D铆az</a>, <a href="/search/physics?searchtype=author&query=Diesburg%2C+M">M. Diesburg</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="1804.00471v3-abstract-short" style="display: inline;"> The measurement of the internal $^{222}$Rn activity in the NEXT-White detector during the so-called Run-II period with $^{136}$Xe-depleted xenon is discussed in detail, together with its implications for double beta decay searches in NEXT. The activity is measured through the alpha production rate induced in the fiducial volume by $^{222}$Rn and its alpha-emitting progeny. The specific activity is… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.00471v3-abstract-full').style.display = 'inline'; document.getElementById('1804.00471v3-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1804.00471v3-abstract-full" style="display: none;"> The measurement of the internal $^{222}$Rn activity in the NEXT-White detector during the so-called Run-II period with $^{136}$Xe-depleted xenon is discussed in detail, together with its implications for double beta decay searches in NEXT. The activity is measured through the alpha production rate induced in the fiducial volume by $^{222}$Rn and its alpha-emitting progeny. The specific activity is measured to be $(38.1\pm 2.2~\mathrm{(stat.)}\pm 5.9~\mathrm{(syst.)})$~mBq/m$^3$. Radon-induced electrons have also been characterized from the decay of the $^{214}$Bi daughter ions plating out on the cathode of the time projection chamber. From our studies, we conclude that radon-induced backgrounds are sufficiently low to enable a successful NEXT-100 physics program, as the projected rate contribution should not exceed 0.1~counts/yr in the neutrinoless double beta decay sample. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1804.00471v3-abstract-full').style.display = 'none'; document.getElementById('1804.00471v3-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 2 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">28 pages, 10 figures, 6 tables. Version accepted for publication in JHEP</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> </div> </main> <footer> <div class="columns is-desktop" role="navigation" aria-label="Secondary">  <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/about">About</a></li> <li><a href="https://info.arxiv.org/help">Help</a></li> </ul> </div> <div class="column"> <ul class="nav-spaced"> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>contact arXiv</title><desc>Click here to contact arXiv</desc><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg> <a href="https://info.arxiv.org/help/contact.html"> Contact</a> </li> <li> <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><title>subscribe to arXiv mailings</title><desc>Click here to subscribe</desc><path d="M476 3.2L12.5 270.6c-18.1 10.4-15.8 35.6 2.2 43.2L121 358.4l287.3-253.2c5.5-4.9 13.3 2.6 8.6 8.3L176 407v80.5c0 23.6 28.5 32.9 42.5 15.8L282 426l124.6 52.2c14.2 6 30.4-2.9 33-18.2l72-432C515 7.8 493.3-6.8 476 3.2z"/></svg> <a href="https://info.arxiv.org/help/subscribe"> Subscribe</a> </li> </ul> </div> </div> </div>   <div class="column"> <div class="columns"> <div class="column"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/license/index.html">Copyright</a></li> <li><a href="https://info.arxiv.org/help/policies/privacy_policy.html">Privacy Policy</a></li> </ul> </div> <div class="column sorry-app-links"> <ul class="nav-spaced"> <li><a href="https://info.arxiv.org/help/web_accessibility.html">Web Accessibility Assistance</a></li> <li> <p class="help"> <a class="a11y-main-link" href="https://status.arxiv.org" target="_blank">arXiv Operational Status <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 256 512" class="icon filter-dark_grey" role="presentation"><path d="M224.3 273l-136 136c-9.4 9.4-24.6 9.4-33.9 0l-22.6-22.6c-9.4-9.4-9.4-24.6 0-33.9l96.4-96.4-96.4-96.4c-9.4-9.4-9.4-24.6 0-33.9L54.3 103c9.4-9.4 24.6-9.4 33.9 0l136 136c9.5 9.4 9.5 24.6.1 34z"/></svg></a><br> Get status notifications via <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/email/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="icon filter-black" role="presentation"><path d="M502.3 190.8c3.9-3.1 9.7-.2 9.7 4.7V400c0 26.5-21.5 48-48 48H48c-26.5 0-48-21.5-48-48V195.6c0-5 5.7-7.8 9.7-4.7 22.4 17.4 52.1 39.5 154.1 113.6 21.1 15.4 56.7 47.8 92.2 47.6 35.7.3 72-32.8 92.3-47.6 102-74.1 131.6-96.3 154-113.7zM256 320c23.2.4 56.6-29.2 73.4-41.4 132.7-96.3 142.8-104.7 173.4-128.7 5.8-4.5 9.2-11.5 9.2-18.9v-19c0-26.5-21.5-48-48-48H48C21.5 64 0 85.5 0 112v19c0 7.4 3.4 14.3 9.2 18.9 30.6 23.9 40.7 32.4 173.4 128.7 16.8 12.2 50.2 41.8 73.4 41.4z"/></svg>email</a> or <a class="is-link" href="https://subscribe.sorryapp.com/24846f03/slack/new" target="_blank"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512" class="icon filter-black" role="presentation"><path d="M94.12 315.1c0 25.9-21.16 47.06-47.06 47.06S0 341 0 315.1c0-25.9 21.16-47.06 47.06-47.06h47.06v47.06zm23.72 0c0-25.9 21.16-47.06 47.06-47.06s47.06 21.16 47.06 47.06v117.84c0 25.9-21.16 47.06-47.06 47.06s-47.06-21.16-47.06-47.06V315.1zm47.06-188.98c-25.9 0-47.06-21.16-47.06-47.06S139 32 164.9 32s47.06 21.16 47.06 47.06v47.06H164.9zm0 23.72c25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06H47.06C21.16 243.96 0 222.8 0 196.9s21.16-47.06 47.06-47.06H164.9zm188.98 47.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06s-21.16 47.06-47.06 47.06h-47.06V196.9zm-23.72 0c0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06V79.06c0-25.9 21.16-47.06 47.06-47.06 25.9 0 47.06 21.16 47.06 47.06V196.9zM283.1 385.88c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06-25.9 0-47.06-21.16-47.06-47.06v-47.06h47.06zm0-23.72c-25.9 0-47.06-21.16-47.06-47.06 0-25.9 21.16-47.06 47.06-47.06h117.84c25.9 0 47.06 21.16 47.06 47.06 0 25.9-21.16 47.06-47.06 47.06H283.1z"/></svg>slack</a> </p> </li> </ul> </div> </div> </div>  </div> </footer> <script src="https://static.arxiv.org/static/base/1.0.0a5/js/member_acknowledgement.js"></script> </body> </html>

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