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<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/2305.11679">arXiv:2305.11679</a> <span> [<a href="https://arxiv.org/pdf/2305.11679">pdf</a>, <a href="https://arxiv.org/format/2305.11679">other</a>] </span> </p> <div class="tags is-inline-block"> <span class="tag is-small is-link tooltip is-tooltip-top" data-tooltip="Atomic Physics">physics.atom-ph</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 helion charge radius from laser spectroscopy of muonic helium-3 ions </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=The+CREMA+Collaboration"> The CREMA Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Schuhmann%2C+K">Karsten Schuhmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Fernandes%2C+L+M+P">Luis M. P. Fernandes</a>, <a href="/search/nucl-ex?searchtype=author&query=Nez%2C+F">Fran莽ois Nez</a>, <a href="/search/nucl-ex?searchtype=author&query=Ahmed%2C+M+A">Marwan Abdou Ahmed</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaro%2C+F+D">Fernando D. Amaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaro%2C+P">Pedro Amaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Biraben%2C+F">Fran莽ois Biraben</a>, <a href="/search/nucl-ex?searchtype=author&query=Chen%2C+T">Tzu-Ling Chen</a>, <a href="/search/nucl-ex?searchtype=author&query=Covita%2C+D+S">Daniel S. Covita</a>, <a href="/search/nucl-ex?searchtype=author&query=Dax%2C+A+J">Andreas J. Dax</a>, <a href="/search/nucl-ex?searchtype=author&query=Diepold%2C+M">Marc Diepold</a>, <a href="/search/nucl-ex?searchtype=author&query=Franke%2C+B">Beatrice Franke</a>, <a href="/search/nucl-ex?searchtype=author&query=Galtier%2C+S">Sandrine Galtier</a>, <a href="/search/nucl-ex?searchtype=author&query=Gouvea%2C+A+L">Andrea L. Gouvea</a>, <a href="/search/nucl-ex?searchtype=author&query=G%C3%B6tzfried%2C+J">Johannes G枚tzfried</a>, <a href="/search/nucl-ex?searchtype=author&query=Graf%2C+T">Thomas Graf</a>, <a href="/search/nucl-ex?searchtype=author&query=H%C3%A4nsch%2C+T+W">Theodor W. H盲nsch</a>, <a href="/search/nucl-ex?searchtype=author&query=Hildebrandt%2C+M">Malte Hildebrandt</a>, <a href="/search/nucl-ex?searchtype=author&query=Indelicato%2C+P">Paul Indelicato</a>, <a href="/search/nucl-ex?searchtype=author&query=Julien%2C+L">Lucile Julien</a>, <a href="/search/nucl-ex?searchtype=author&query=Kirch%2C+K">Klaus Kirch</a>, <a href="/search/nucl-ex?searchtype=author&query=Knecht%2C+A">Andreas Knecht</a>, <a href="/search/nucl-ex?searchtype=author&query=Kottmann%2C+F">Franz Kottmann</a>, <a href="/search/nucl-ex?searchtype=author&query=Krauth%2C+J+J">Julian J. Krauth</a> , et al. (15 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="2305.11679v2-abstract-short" style="display: inline;"> Hydrogen-like light muonic ions, in which one negative muon replaces all the electrons, are extremely sensitive probes of nuclear structure, because the large muon mass increases tremendously the wave function overlap with the nucleus. Using pulsed laser spectroscopy we have measured three 2S-2P transitions in the muonic helium-3 ion ($渭^3$He$^+$), an ion formed by a negative muon and bare helium-… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.11679v2-abstract-full').style.display = 'inline'; document.getElementById('2305.11679v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2305.11679v2-abstract-full" style="display: none;"> Hydrogen-like light muonic ions, in which one negative muon replaces all the electrons, are extremely sensitive probes of nuclear structure, because the large muon mass increases tremendously the wave function overlap with the nucleus. Using pulsed laser spectroscopy we have measured three 2S-2P transitions in the muonic helium-3 ion ($渭^3$He$^+$), an ion formed by a negative muon and bare helium-3 nucleus. This allowed us to extract the Lamb shift $E(2P_{1/2}-2S_{1/2})= 1258.598(48)^{\rm exp}(3)^{\rm theo}$ meV, the 2P fine structure splitting $E_{\rm FS}^{\rm exp} = 144.958(114)$ meV, and the 2S-hyperfine splitting (HFS) $E_{\rm HFS}^{\rm exp} = -166.495(104)^{\rm exp}(3)^{\rm theo}$ meV in $渭^3$He$^+$. Comparing these measurements to theory we determine the rms charge radius of the helion ($^3$He nucleus) to be $r_h$ = 1.97007(94) fm. This radius represents a benchmark for few nucleon theories and opens the way for precision tests in $^3$He atoms and $^3$He-ions. This radius is in good agreement with the value from elastic electron scattering, but a factor 15 more accurate. Combining our Lamb shift measurement with our earlier one in $渭^4$He$^+$ we obtain $r_h^2-r_伪^2 = 1.0636(6)^{\rm exp}(30)^{\rm theo}$ fm$^2$ to be compared to results from the isotope shift measurements in regular He atoms, which are however affected by long-standing tensions. By comparing $E_{\rm HFS}^{\rm exp}$ with theory we also obtain the two-photon-exchange contribution (including higher orders) which is another important benchmark for ab-initio few-nucleon theories aiming at understanding the magnetic and current structure of light nuclei. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2305.11679v2-abstract-full').style.display = 'none'; document.getElementById('2305.11679v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 25 June, 2023; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 19 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">Comments:</span> <span class="has-text-grey-dark mathjax">8 pages, 5 figures</span> </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2203.02309">arXiv:2203.02309</a> <span> [<a href="https://arxiv.org/pdf/2203.02309">pdf</a>, <a href="https://arxiv.org/format/2203.02309">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="Cosmology and Nongalactic Astrophysics">astro-ph.CO</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/10.1088/1361-6471/ac841a">10.1088/1361-6471/ac841a <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Aalbers%2C+J">J. Aalbers</a>, <a href="/search/nucl-ex?searchtype=author&query=Abe%2C+K">K. Abe</a>, <a href="/search/nucl-ex?searchtype=author&query=Aerne%2C+V">V. Aerne</a>, <a href="/search/nucl-ex?searchtype=author&query=Agostini%2C+F">F. Agostini</a>, <a href="/search/nucl-ex?searchtype=author&query=Maouloud%2C+S+A">S. Ahmed Maouloud</a>, <a href="/search/nucl-ex?searchtype=author&query=Akerib%2C+D+S">D. S. Akerib</a>, <a href="/search/nucl-ex?searchtype=author&query=Akimov%2C+D+Y">D. Yu. Akimov</a>, <a href="/search/nucl-ex?searchtype=author&query=Akshat%2C+J">J. Akshat</a>, <a href="/search/nucl-ex?searchtype=author&query=Musalhi%2C+A+K+A">A. K. Al Musalhi</a>, <a href="/search/nucl-ex?searchtype=author&query=Alder%2C+F">F. Alder</a>, <a href="/search/nucl-ex?searchtype=author&query=Alsum%2C+S+K">S. K. Alsum</a>, <a href="/search/nucl-ex?searchtype=author&query=Althueser%2C+L">L. Althueser</a>, <a href="/search/nucl-ex?searchtype=author&query=Amarasinghe%2C+C+S">C. S. Amarasinghe</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Ames%2C+A">A. Ames</a>, <a href="/search/nucl-ex?searchtype=author&query=Anderson%2C+T+J">T. J. Anderson</a>, <a href="/search/nucl-ex?searchtype=author&query=Andrieu%2C+B">B. Andrieu</a>, <a href="/search/nucl-ex?searchtype=author&query=Angelides%2C+N">N. Angelides</a>, <a href="/search/nucl-ex?searchtype=author&query=Angelino%2C+E">E. Angelino</a>, <a href="/search/nucl-ex?searchtype=author&query=Angevaare%2C+J">J. Angevaare</a>, <a href="/search/nucl-ex?searchtype=author&query=Antochi%2C+V+C">V. C. Antochi</a>, <a href="/search/nucl-ex?searchtype=author&query=Martin%2C+D+A">D. Ant贸n Martin</a>, <a href="/search/nucl-ex?searchtype=author&query=Antunovic%2C+B">B. Antunovic</a>, <a href="/search/nucl-ex?searchtype=author&query=Aprile%2C+E">E. Aprile</a>, <a href="/search/nucl-ex?searchtype=author&query=Ara%C3%BAjo%2C+H+M">H. M. Ara煤jo</a> , et al. (572 additional authors not shown) </p> <p class="abstract mathjax"> <span class="has-text-black-bis has-text-weight-semibold">Abstract</span>: <span class="abstract-short has-text-grey-dark mathjax" id="2203.02309v1-abstract-short" style="display: inline;"> The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for Weakly Interacting Massive Particles (WIMPs), while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neut… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.02309v1-abstract-full').style.display = 'inline'; document.getElementById('2203.02309v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2203.02309v1-abstract-full" style="display: none;"> The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for Weakly Interacting Massive Particles (WIMPs), while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neutrinos through neutrinoless double-beta decay and through a variety of astrophysical sources. A next-generation xenon-based detector will therefore be a true multi-purpose observatory to significantly advance particle physics, nuclear physics, astrophysics, solar physics, and cosmology. This review article presents the science cases for such a detector. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2203.02309v1-abstract-full').style.display = 'none'; document.getElementById('2203.02309v1-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, 2022; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2022. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">77 pages, 40 figures, 1262 references</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> INT-PUB-22-003 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> J. Phys. G: Nucl. Part. Phys. 50 (2023) 013001 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/2003.03825">arXiv:2003.03825</a> <span> [<a href="https://arxiv.org/pdf/2003.03825">pdf</a>, <a href="https://arxiv.org/format/2003.03825">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="High Energy Physics - Experiment">hep-ex</span> <span class="tag is-small is-grey tooltip is-tooltip-top" data-tooltip="Nuclear Experiment">nucl-ex</span> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epjc/s10052-020-8284-0">10.1140/epjc/s10052-020-8284-0 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Energy resolution and linearity of XENON1T in the MeV energy range </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Aprile%2C+E">E. Aprile</a>, <a href="/search/nucl-ex?searchtype=author&query=Aalbers%2C+J">J. Aalbers</a>, <a href="/search/nucl-ex?searchtype=author&query=Agostini%2C+F">F. Agostini</a>, <a href="/search/nucl-ex?searchtype=author&query=Alfonsi%2C+M">M. Alfonsi</a>, <a href="/search/nucl-ex?searchtype=author&query=Althueser%2C+L">L. Althueser</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Antochi%2C+V+C">V. C. Antochi</a>, <a href="/search/nucl-ex?searchtype=author&query=Angelino%2C+E">E. Angelino</a>, <a href="/search/nucl-ex?searchtype=author&query=Angevaare%2C+J">J. Angevaare</a>, <a href="/search/nucl-ex?searchtype=author&query=Arneodo%2C+F">F. Arneodo</a>, <a href="/search/nucl-ex?searchtype=author&query=Barge%2C+D">D. Barge</a>, <a href="/search/nucl-ex?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/nucl-ex?searchtype=author&query=Bauermeister%2C+B">B. Bauermeister</a>, <a href="/search/nucl-ex?searchtype=author&query=Bellagamba%2C+L">L. Bellagamba</a>, <a href="/search/nucl-ex?searchtype=author&query=Benabderrahmane%2C+M+L">M. L. Benabderrahmane</a>, <a href="/search/nucl-ex?searchtype=author&query=Berger%2C+T">T. Berger</a>, <a href="/search/nucl-ex?searchtype=author&query=Breur%2C+P+A">P. A. Breur</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+A">A. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+E">E. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Bruenner%2C+S">S. Bruenner</a>, <a href="/search/nucl-ex?searchtype=author&query=Bruno%2C+G">G. Bruno</a>, <a href="/search/nucl-ex?searchtype=author&query=Budnik%2C+R">R. Budnik</a>, <a href="/search/nucl-ex?searchtype=author&query=Capelli%2C+C">C. Capelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Cardoso%2C+J+M+R">J. M. R. Cardoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Cichon%2C+D">D. Cichon</a> , et al. (113 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="2003.03825v2-abstract-short" style="display: inline;"> Xenon dual-phase time projection chambers designed to search for Weakly Interacting Massive Particles have so far shown a relative energy resolution which degrades with energy above $\sim$200 keV due to the saturation effects. This has limited their sensitivity in the search for rare events like the neutrinoless double-beta decay of $^{136}$Xe at its $Q$-value, $Q_{尾尾}\simeq$ 2.46 MeV. For the XEN… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.03825v2-abstract-full').style.display = 'inline'; document.getElementById('2003.03825v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="2003.03825v2-abstract-full" style="display: none;"> Xenon dual-phase time projection chambers designed to search for Weakly Interacting Massive Particles have so far shown a relative energy resolution which degrades with energy above $\sim$200 keV due to the saturation effects. This has limited their sensitivity in the search for rare events like the neutrinoless double-beta decay of $^{136}$Xe at its $Q$-value, $Q_{尾尾}\simeq$ 2.46 MeV. For the XENON1T dual-phase time projection chamber, we demonstrate that the relative energy resolution at 1 $蟽/渭$ is as low as (0.80$\pm$0.02) % in its one-ton fiducial mass, and for single-site interactions at $Q_{尾尾}$. We also present a new signal correction method to rectify the saturation effects of the signal readout system, resulting in more accurate position reconstruction and indirectly improving the energy resolution. The very good result achieved in XENON1T opens up new windows for the xenon dual-phase dark matter detectors to simultaneously search for other rare events. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('2003.03825v2-abstract-full').style.display = 'none'; document.getElementById('2003.03825v2-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 9 September, 2020; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 8 March, 2020; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 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">9 pages, 7 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur. Phys. J. C 80, 785 (2020) </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1904.11002">arXiv:1904.11002</a> <span> [<a href="https://arxiv.org/pdf/1904.11002">pdf</a>, <a href="https://arxiv.org/format/1904.11002">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> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1038/s41586-019-1124-4">10.1038/s41586-019-1124-4 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> First observation of two-neutrino double electron capture in $^{124}$Xe with XENON1T </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Aprile%2C+E">E. Aprile</a>, <a href="/search/nucl-ex?searchtype=author&query=Aalbers%2C+J">J. Aalbers</a>, <a href="/search/nucl-ex?searchtype=author&query=Agostini%2C+F">F. Agostini</a>, <a href="/search/nucl-ex?searchtype=author&query=Alfonsi%2C+M">M. Alfonsi</a>, <a href="/search/nucl-ex?searchtype=author&query=Althueser%2C+L">L. Althueser</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Anthony%2C+M">M. Anthony</a>, <a href="/search/nucl-ex?searchtype=author&query=Antochi%2C+V+C">V. C. Antochi</a>, <a href="/search/nucl-ex?searchtype=author&query=Arneodo%2C+F">F. Arneodo</a>, <a href="/search/nucl-ex?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/nucl-ex?searchtype=author&query=Bauermeister%2C+B">B. Bauermeister</a>, <a href="/search/nucl-ex?searchtype=author&query=Benabderrahmane%2C+M+L">M. L. Benabderrahmane</a>, <a href="/search/nucl-ex?searchtype=author&query=Berger%2C+T">T. Berger</a>, <a href="/search/nucl-ex?searchtype=author&query=Breur%2C+P+A">P. A. Breur</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+A">A. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+A">A. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+E">E. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Bruenner%2C+S">S. Bruenner</a>, <a href="/search/nucl-ex?searchtype=author&query=Bruno%2C+G">G. Bruno</a>, <a href="/search/nucl-ex?searchtype=author&query=Budnik%2C+R">R. Budnik</a>, <a href="/search/nucl-ex?searchtype=author&query=Capelli%2C+C">C. Capelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Cardoso%2C+J+M+R">J. M. R. Cardoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Cichon%2C+D">D. Cichon</a>, <a href="/search/nucl-ex?searchtype=author&query=Coderre%2C+D">D. Coderre</a>, <a href="/search/nucl-ex?searchtype=author&query=Colijn%2C+A+P">A. P. Colijn</a> , et al. (106 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="1904.11002v1-abstract-short" style="display: inline;"> Two-neutrino double electron capture ($2谓$ECEC) is a second-order Weak process with predicted half-lives that surpass the age of the Universe by many orders of magnitude. Until now, indications for $2谓$ECEC decays have only been seen for two isotopes, $^{78}$Kr and $^{130}$Ba, and instruments with very low background levels are needed to detect them directly with high statistical significance. The… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.11002v1-abstract-full').style.display = 'inline'; document.getElementById('1904.11002v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1904.11002v1-abstract-full" style="display: none;"> Two-neutrino double electron capture ($2谓$ECEC) is a second-order Weak process with predicted half-lives that surpass the age of the Universe by many orders of magnitude. Until now, indications for $2谓$ECEC decays have only been seen for two isotopes, $^{78}$Kr and $^{130}$Ba, and instruments with very low background levels are needed to detect them directly with high statistical significance. The $2谓$ECEC half-life provides an important input for nuclear structure models and its measurement represents a first step in the search for the neutrinoless double electron capture processes ($0谓$ECEC). A detection of the latter would have implications for the nature of the neutrino and give access to the absolute neutrino mass. Here we report on the first direct observation of $2谓$ECEC in $^{124}$Xe with the XENON1T Dark Matter detector. The significance of the signal is $4.4蟽$ and the corresponding half-life $T_{1/2}^{2谓\text{ECEC}} = (1.8\pm 0.5_\text{stat}\pm 0.1_\text{sys})\times 10^{22}\;\text{y}$ is the longest ever measured directly. This study demonstrates that the low background and large target mass of xenon-based Dark Matter detectors make them well suited to measuring other rare processes as well, and it highlights the broad physics reach for even larger next-generation experiments. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1904.11002v1-abstract-full').style.display = 'none'; document.getElementById('1904.11002v1-abstract-short').style.display = 'inline';">△ Less</a> </span> </p> <p class="is-size-7"><span class="has-text-black-bis has-text-weight-semibold">Submitted</span> 24 April, 2019; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> April 2019. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Nature 568, p.532-535, 2019 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1609.03354">arXiv:1609.03354</a> <span> [<a href="https://arxiv.org/pdf/1609.03354">pdf</a>, <a href="https://arxiv.org/format/1609.03354">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="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.95.024605">10.1103/PhysRevC.95.024605 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Search for Two-Neutrino Double Electron Capture of $^{124}$Xe with XENON100 </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=The+XENON+Collaboration"> The XENON Collaboration</a>, <a href="/search/nucl-ex?searchtype=author&query=Aprile%2C+E">E. Aprile</a>, <a href="/search/nucl-ex?searchtype=author&query=Aalbers%2C+J">J. Aalbers</a>, <a href="/search/nucl-ex?searchtype=author&query=Agostini%2C+F">F. Agostini</a>, <a href="/search/nucl-ex?searchtype=author&query=Alfonsi%2C+M">M. Alfonsi</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Anthony%2C+M">M. Anthony</a>, <a href="/search/nucl-ex?searchtype=author&query=Arneodo%2C+F">F. Arneodo</a>, <a href="/search/nucl-ex?searchtype=author&query=Barrow%2C+P">P. Barrow</a>, <a href="/search/nucl-ex?searchtype=author&query=Baudis%2C+L">L. Baudis</a>, <a href="/search/nucl-ex?searchtype=author&query=Bauermeister%2C+B">B. Bauermeister</a>, <a href="/search/nucl-ex?searchtype=author&query=Benabderrahmane%2C+M+L">M. L. Benabderrahmane</a>, <a href="/search/nucl-ex?searchtype=author&query=Berger%2C+T">T. Berger</a>, <a href="/search/nucl-ex?searchtype=author&query=Breur%2C+P+A">P. A. Breur</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+A">A. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Brown%2C+E">E. Brown</a>, <a href="/search/nucl-ex?searchtype=author&query=Bruenner%2C+S">S. Bruenner</a>, <a href="/search/nucl-ex?searchtype=author&query=Bruno%2C+G">G. Bruno</a>, <a href="/search/nucl-ex?searchtype=author&query=Budnik%2C+R">R. Budnik</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BCtikofer%2C+L">L. B眉tikofer</a>, <a href="/search/nucl-ex?searchtype=author&query=Calv%C3%A9n%2C+J">J. Calv茅n</a>, <a href="/search/nucl-ex?searchtype=author&query=Cardoso%2C+J+M+R">J. M. R. Cardoso</a>, <a href="/search/nucl-ex?searchtype=author&query=Cervantes%2C+M">M. Cervantes</a>, <a href="/search/nucl-ex?searchtype=author&query=Cichon%2C+D">D. Cichon</a>, <a href="/search/nucl-ex?searchtype=author&query=Coderre%2C+D">D. Coderre</a> , et al. (92 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="1609.03354v2-abstract-short" style="display: inline;"> Two-neutrino double electron capture is a rare nuclear decay where two electrons are simultaneously captured from the atomic shell. For $^{124}$Xe this process has not yet been observed and its detection would provide a new reference for nuclear matrix element calculations. We have conducted a search for two-neutrino double electron capture from the K-shell of $^{124}$Xe using 7636 kg$\cdot$d of d… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.03354v2-abstract-full').style.display = 'inline'; document.getElementById('1609.03354v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1609.03354v2-abstract-full" style="display: none;"> Two-neutrino double electron capture is a rare nuclear decay where two electrons are simultaneously captured from the atomic shell. For $^{124}$Xe this process has not yet been observed and its detection would provide a new reference for nuclear matrix element calculations. We have conducted a search for two-neutrino double electron capture from the K-shell of $^{124}$Xe using 7636 kg$\cdot$d of data from the XENON100 dark matter detector. Using a Bayesian analysis we observed no significant excess above background, leading to a lower 90 % credibility limit on the half-life $T_{1/2}>6.5\times10^{20}$ yr. We also evaluated the sensitivity of the XENON1T experiment, which is currently being commissioned, and find a sensitivity of $T_{1/2}>6.1\times10^{22}$ yr after an exposure of 2 t$\cdot$yr. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1609.03354v2-abstract-full').style.display = 'none'; document.getElementById('1609.03354v2-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 February, 2017; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 12 September, 2016; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> September 2016. </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Comments:</span> <span class="has-text-grey-dark mathjax">6 pages, 4 figures</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys. Rev. C 95, 024605, Published 13 February 2017 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1011.2415">arXiv:1011.2415</a> <span> [<a href="https://arxiv.org/pdf/1011.2415">pdf</a>, <a href="https://arxiv.org/format/1011.2415">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> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1140/epja/i2011-11088-1">10.1140/epja/i2011-11088-1 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pionic deuterium </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Strauch%2C+T">Th. Strauch</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Anagnostopoulos%2C+D">D. Anagnostopoulos</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BChler%2C+P">P. B眉hler</a>, <a href="/search/nucl-ex?searchtype=author&query=Covita%2C+D+S">D. S. Covita</a>, <a href="/search/nucl-ex?searchtype=author&query=Gorke%2C+H">H. Gorke</a>, <a href="/search/nucl-ex?searchtype=author&query=Gotta%2C+D">D. Gotta</a>, <a href="/search/nucl-ex?searchtype=author&query=Gruber%2C+A">A. Gruber</a>, <a href="/search/nucl-ex?searchtype=author&query=Hirtl%2C+A">A. Hirtl</a>, <a href="/search/nucl-ex?searchtype=author&query=Indelicato%2C+P">P. Indelicato</a>, <a href="/search/nucl-ex?searchtype=author&query=Bigot%2C+E+-+L">E. -O. Le Bigot</a>, <a href="/search/nucl-ex?searchtype=author&query=Nekipelov%2C+M">M. Nekipelov</a>, <a href="/search/nucl-ex?searchtype=author&query=Santos%2C+J+M+F+d">J. M. F. dos Santos</a>, <a href="/search/nucl-ex?searchtype=author&query=Schmid%2C+P">Ph. Schmid</a>, <a href="/search/nucl-ex?searchtype=author&query=Schlesser%2C+S">S. Schlesser</a>, <a href="/search/nucl-ex?searchtype=author&query=Simons%2C+L+M">L. M. Simons</a>, <a href="/search/nucl-ex?searchtype=author&query=Trassinelli%2C+M">M. Trassinelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Veloso%2C+J+F+C+A">J. F. C. A. Veloso</a>, <a href="/search/nucl-ex?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</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="1011.2415v2-abstract-short" style="display: inline;"> The strong interaction shift $蔚$ and broadening 螕 in pionic deuterium have been determined in a high statistics study of the 蟺D(3p - 1s) X-ray transition using a high-resolution crystal spectrometer. The pionic deuterium shift will provide constraints for the pion-nucleon isospin scattering lengths extracted from measurements of shift and broadening in pionic hydrogen. The hadronic broadening is r… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1011.2415v2-abstract-full').style.display = 'inline'; document.getElementById('1011.2415v2-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1011.2415v2-abstract-full" style="display: none;"> The strong interaction shift $蔚$ and broadening 螕 in pionic deuterium have been determined in a high statistics study of the 蟺D(3p - 1s) X-ray transition using a high-resolution crystal spectrometer. The pionic deuterium shift will provide constraints for the pion-nucleon isospin scattering lengths extracted from measurements of shift and broadening in pionic hydrogen. The hadronic broadening is related to pion absorption and production at threshold. The results are 蔚= (-2356 {\pm} 31)meV (repulsive) and 螕1s = (1171+23/-49) meV yielding for the complex 蟺D scattering length a = [-(24.99 {\pm} 0.33) + i (6.22+0.12/-0.26)]x10-3/m蟺. From the imaginary part, the threshold parameter for pion production is obtained to be 伪 = (251 +5/-11) 渭b. This allows, in addition, and by using results from pion absorption in 3He at threshold, the determination of the effective couplings g0 and g1 for s-wave pion absorption on isoscalar and isovector NN pairs. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1011.2415v2-abstract-full').style.display = 'none'; document.getElementById('1011.2415v2-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> 12 July, 2011; <span class="has-text-black-bis has-text-weight-semibold">v1</span> submitted 10 November, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> November 2010. </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, 14 figures, 8 tables accepted for publication in EPJA</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Report number:</span> LEX-10-01 </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Eur.Phys.J.A47:88,2011 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1003.4153">arXiv:1003.4153</a> <span> [<a href="https://arxiv.org/pdf/1003.4153">pdf</a>, <a href="https://arxiv.org/ps/1003.4153">ps</a>, <a href="https://arxiv.org/format/1003.4153">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> </div> <div class="is-inline-block" style="margin-left: 0.5rem"> <div class="tags has-addons"> <span class="tag is-dark is-size-7">doi</span> <span class="tag is-light is-size-7"><a class="" href="https://doi.org/10.1103/PhysRevLett.104.142503">10.1103/PhysRevLett.104.142503 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Precision determination of the dpi -> NN transition strength at threshold </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Strauch%2C+T">Th. Strauch</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Anagnostopoulos%2C+D+F">D. F. Anagnostopoulos</a>, <a href="/search/nucl-ex?searchtype=author&query=B%C3%BChler%2C+P">P. B眉hler</a>, <a href="/search/nucl-ex?searchtype=author&query=Covita%2C+D+S">D. S. Covita</a>, <a href="/search/nucl-ex?searchtype=author&query=Gorke%2C+H">H. Gorke</a>, <a href="/search/nucl-ex?searchtype=author&query=Gotta%2C+D">D. Gotta</a>, <a href="/search/nucl-ex?searchtype=author&query=Gruber%2C+A">A. Gruber</a>, <a href="/search/nucl-ex?searchtype=author&query=Hirtl%2C+A">A. Hirtl</a>, <a href="/search/nucl-ex?searchtype=author&query=Indelicato%2C+P">P. Indelicato</a>, <a href="/search/nucl-ex?searchtype=author&query=LeBigot%2C+E+-">E. -O. LeBigot</a>, <a href="/search/nucl-ex?searchtype=author&query=Nekipelov%2C+M">M. Nekipelov</a>, <a href="/search/nucl-ex?searchtype=author&query=Santos%2C+J+M+F+d">J. M. F. dos Santos</a>, <a href="/search/nucl-ex?searchtype=author&query=Schlesser%2C+S">S. Schlesser</a>, <a href="/search/nucl-ex?searchtype=author&query=Schmid%2C+P">Ph. Schmid</a>, <a href="/search/nucl-ex?searchtype=author&query=Simons%2C+L+M">L. M. Simons</a>, <a href="/search/nucl-ex?searchtype=author&query=Trassinelli%2C+M">M. Trassinelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Veloso%2C+J+F+C+A">J. F. C. A. Veloso</a>, <a href="/search/nucl-ex?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</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="1003.4153v1-abstract-short" style="display: inline;"> An unusual but effective way to determine at threshold the dpi -> NN transition strength is to exploit the hadronic ground-state broadening in pionic deuterium, accessible by x-ray spectroscopy. The broadening is dominated by the true absorption channel dpi- -> nn, which is related to s-wave pion production pp -> dpi+ by charge symmetry and detailed balance. Using the exotic atom circumvents the… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1003.4153v1-abstract-full').style.display = 'inline'; document.getElementById('1003.4153v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1003.4153v1-abstract-full" style="display: none;"> An unusual but effective way to determine at threshold the dpi -> NN transition strength is to exploit the hadronic ground-state broadening in pionic deuterium, accessible by x-ray spectroscopy. The broadening is dominated by the true absorption channel dpi- -> nn, which is related to s-wave pion production pp -> dpi+ by charge symmetry and detailed balance. Using the exotic atom circumvents the problem of Coulomb corrections to the cross section as necessary in the production experiments. Our dedicated measurement finds (1171+23/-49) meV for the broadening yielding (252+5/-11) \mub. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1003.4153v1-abstract-full').style.display = 'none'; document.getElementById('1003.4153v1-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 March, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> March 2010. </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">4 pages, 2 figures, 1 table</span> </p> <p class="comments is-size-7"> <span class="has-text-black-bis has-text-weight-semibold">Journal ref:</span> Phys.Rev.Lett.104:142503,2010 </p> </li> <li class="arxiv-result"> <div class="is-marginless"> <p class="list-title is-inline-block"><a href="https://arxiv.org/abs/1002.4277">arXiv:1002.4277</a> <span> [<a href="https://arxiv.org/pdf/1002.4277">pdf</a>, <a href="https://arxiv.org/ps/1002.4277">ps</a>, <a href="https://arxiv.org/format/1002.4277">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> </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/10.1051/epjconf/20100303006">10.1051/epjconf/20100303006 <i class="fa fa-external-link" aria-hidden="true"></i></a></span> </div> </div> </div> <p class="title is-5 mathjax"> Pionic Deuterium </p> <p class="authors"> <span class="search-hit">Authors:</span> <a href="/search/nucl-ex?searchtype=author&query=Strauch%2C+T">Th. Strauch</a>, <a href="/search/nucl-ex?searchtype=author&query=Amaro%2C+F+D">F. D. Amaro</a>, <a href="/search/nucl-ex?searchtype=author&query=Anagnostopoulos%2C+D+F">D. F. Anagnostopoulos</a>, <a href="/search/nucl-ex?searchtype=author&query=B%22%5Cuhler%2C+P">P. B"\uhler</a>, <a href="/search/nucl-ex?searchtype=author&query=Covita%2C+D+S">D. S. Covita</a>, <a href="/search/nucl-ex?searchtype=author&query=Gorke%2C+H">H. Gorke</a>, <a href="/search/nucl-ex?searchtype=author&query=Gotta%2C+D">D. Gotta</a>, <a href="/search/nucl-ex?searchtype=author&query=Gruber%2C+A">A. Gruber</a>, <a href="/search/nucl-ex?searchtype=author&query=Hirtl%2C+A">A. Hirtl</a>, <a href="/search/nucl-ex?searchtype=author&query=Indelicato%2C+P">P. Indelicato</a>, <a href="/search/nucl-ex?searchtype=author&query=Bigot%2C+E+-+L">E. -O. Le Bigot</a>, <a href="/search/nucl-ex?searchtype=author&query=Nekipelov%2C+M">M. Nekipelov</a>, <a href="/search/nucl-ex?searchtype=author&query=Santos%2C+J+M+F+d">J. M. F. dos Santos</a>, <a href="/search/nucl-ex?searchtype=author&query=Schmid%2C+P">Ph. Schmid</a>, <a href="/search/nucl-ex?searchtype=author&query=Schlesser%2C+S">S. Schlesser</a>, <a href="/search/nucl-ex?searchtype=author&query=Simons%2C+L+M">L. M. Simons</a>, <a href="/search/nucl-ex?searchtype=author&query=Trassinelli%2C+M">M. Trassinelli</a>, <a href="/search/nucl-ex?searchtype=author&query=Veloso%2C+J+F+C+A">J. F. C. A. Veloso</a>, <a href="/search/nucl-ex?searchtype=author&query=Zmeskal%2C+J">J. Zmeskal</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="1002.4277v1-abstract-short" style="display: inline;"> The strong interaction shift and broadening in pionic deuterium have been remeasured with high statistics by means of the (3p-1s) X-ray transition using the cyclotron trap and a high-resolution crystal spectrometer. Preliminary results are (-2325+/-31) meV (repulsive) for the shift and (1171+23/-49} meV for the width, which yields precise values for the pion-deuteron scattering length and the th… <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1002.4277v1-abstract-full').style.display = 'inline'; document.getElementById('1002.4277v1-abstract-short').style.display = 'none';">▽ More</a> </span> <span class="abstract-full has-text-grey-dark mathjax" id="1002.4277v1-abstract-full" style="display: none;"> The strong interaction shift and broadening in pionic deuterium have been remeasured with high statistics by means of the (3p-1s) X-ray transition using the cyclotron trap and a high-resolution crystal spectrometer. Preliminary results are (-2325+/-31) meV (repulsive) for the shift and (1171+23/-49} meV for the width, which yields precise values for the pion-deuteron scattering length and the threshold parameter for pion production. <a class="is-size-7" style="white-space: nowrap;" onclick="document.getElementById('1002.4277v1-abstract-full').style.display = 'none'; document.getElementById('1002.4277v1-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 February, 2010; <span class="has-text-black-bis has-text-weight-semibold">originally announced</span> February 2010. </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">Conf. Proc. Few Body 19 (FB19), August 31 - September 5, 2009, Bonn, Germany 9 pages, 13 figures</span> </p> </li> </ol> <div class="is-hidden-tablet">  <span class="help" style="display: inline-block;"><a href="https://github.com/arXiv/arxiv-search/releases">Search v0.5.6 released 2020-02-24</a>  </span> </div> </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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