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A new search for two-neutrino double-beta ($2\nu\beta\beta$) decay of $^{136}\rm Xe$ to the $0^+_1$ excited state of $^{136}\rm Ba$ is performed with the full EXO-200 dataset. A deep learning-based convolutional neural network is used to…

EXO-200 is the first phase of the Enriched Xenon Observatory (EXO) experiment, which searches for neutrinoless double beta decay in 136Xe to measure the mass and probe the Majorana nature of the neutrino. EXO-200 consists of 200 kg of…

High Energy Physics - Experiment · Physics 2009-09-11 Nicole Ackerman

A search for neutrino oscillations induced by Lorentz violation has been performed using 4,438 live-days of Super-Kamiokande atmospheric neutrino data. The Lorentz violation is included in addition to standard three-flavor oscillations…

High Energy Physics - Experiment · Physics 2015-03-18 Kamiokande Collaboration , K. Abe , Y. Haga , Y. Hayato , M. Ikeda , K. Iyogi , J. Kameda , Y. Kishimoto , M. Miura , S. Moriyama , M. Nakahata , Y. Nakano , S. Nakayama , H. Sekiya , M. Shiozawa , Y. Suzuki , A. Takeda , H. Tanaka , T. Tomura , K. Ueno , R. A. Wendell , T. Yokozawa , T. Irvine , T. Kajita , I. Kametani , K. Kaneyuki , K. P. Lee , T. McLachlan , Y. Nishimura , E. Richard , K. Okumura , L. Labarga , P. Fernandez , J. Gustafson , E. Kearns , J. L. Raaf , S. Berkman , H. A. Tanaka , S. Tobayama , J. L. Stone , L. R. Sulak , M. Goldhaber , G. Carminati , W. R. Kropp , S. Mine , P. Weatherly , A. Renshaw , M. B. Smy , H. W. Sobel , V. Takhistov , K. S. Ganezer , B. L. Hartfiel , J. Hill , W. E. Keig , N. Hong , J. Y. Kim , I. T. Lim , T. Akiri , A. Himmel , K. Scholberg , C. W. Walter , T. Wongjirad , T. Ishizuka , S. Tasaka , J. S. Jang , J. G. Learned , S. Matsuno , S. N. Smith , T. Hasegawa , T. Ishida , T. Ishii , T. Kobayashi , T. Nakadaira , K. Nakamura , Y. Oyama , K. Sakashita , T. Sekiguchi , T. Tsukamoto , A. T. Suzuki , Y. Takeuchi , C. Bronner , S. Hirota , K. Huang , K. Ieki , T. Kikawa , A. Minamino , A. Murakami , T. Nakaya , K. Suzuki , S. Takahashi , K. Tateishi , Y. Fukuda , K. Choi , Y. Itow , G. Mitsuka , P. Mijakowski , J. Hignight , J. Imber , C. K. Jung , C. Yanagisawa , H. Ishino , A. Kibayashi , Y. Koshio , T. Mori , M. Sakuda , R. Yamaguchi , T. Yano , Y. Kuno , R. Tacik , S. B. Kim , H. Okazawa , Y. Choi , K. Nishijima , M. Koshiba , Y. Suda , Y. Totsuka , M. Yokoyama , K. Martens , Ll. Marti , M. R. Vagins , J. F. Martin , P. de Perio , A. Konaka , M. J. Wilking , S. Chen , Y. Zhang , K. Connolly , R. J. Wilkes

We present results from the KamLAND-Zen double-beta decay experiment based on an exposure of 77.6 days with 129 kg of $^{136}$Xe. The measured two-neutrino double-beta decay half-life of $^{136}$Xe is $T_{1/2}^{2\nu} = 2.38 \pm 0.02(stat)…

High Energy Physics - Experiment · Physics 2012-04-20 Zen Collaboration

We performed a search for a Lorentz-invariance- and CPT-violating coupling of the $^3$He and $^{129}$Xe nuclear spins to posited background fields. Our experimental approach is to measure the free precession of nuclear spin polarized $^3$He…

High Energy Physics - Phenomenology · Physics 2016-07-27 Fabian Allmendinger , Ulrich Schmidt , Werner Heil , Sergej Karpuk , Yuri Sobolev

EXO is a search for neutrinoless double beta decay in 136Xe. An active R&D program for a 10 ton, enriched 136Xe liquid phase detector is now underway. Current research projects are: decay product extraction, Xe purity studies, energy…

High Energy Physics - Phenomenology · Physics 2012-08-27 EXO Collaboration

We present results from the first phase of the KamLAND-Zen double-beta decay experiment, corresponding to an exposure of 89.5 kg yr of Xe-136. We obtain a lower limit for the neutrinoless double-beta decay half-life of T_{1/2}^{0{\nu}} >…

High Energy Physics - Experiment · Physics 2013-02-27 Zen Collaboration

Neutrinoless double beta decay is a lepton number violating process whose observation would also establish that neutrinos are their own anti-particles. There are many experimental efforts with a variety of techniques. Some (EXO,…

High Energy Physics - Experiment · Physics 2015-06-03 B. Schwingenheuer

We present the first result of the KamLAND-Zen experiment, measurement of 136-Xe double-beta decay. In an exposure of 77.6 days with 129 kg of 136-Xe, two-neutrino double-beta decay half-life is measured precisely to be T_{1/2}^{2\nu} =…

High Energy Physics - Experiment · Physics 2019-08-14 A. Gando

We re-analyze the compatibility of the claimed observation of neutrinoless double beta decay ($0\nu\beta\beta$) in $^{76}$Ge with the new limits on the half-life of $^{136}$Xe from EXO-200 and KamLAND-Zen. Including recent calculations of…

High Energy Physics - Phenomenology · Physics 2013-11-27 P. S. Bhupal Dev , Srubabati Goswami , Manimala Mitra , Werner Rodejohann

Various double beta decay modes of Cd, Zn and Te isotopes are explored with the help of CdTe and CdZnTe semiconductor detectors. The data set is splitted in an energy range below 1 MeV having a statistics of 134.5 g$\cdot$d and one above 1…

Nuclear Experiment · Physics 2009-11-10 H. Kiel , D. Münstermann , K. Zuber

The EXO-200 experiment searched for neutrinoless double-beta decay of $^{136}$Xe with a single-phase liquid xenon detector. It used an active mass of 110 kg of 80.6%-enriched liquid xenon in an ultra-low background time projection chamber…

Instrumentation and Detectors · Physics 2022-02-23 N. Ackerman , J. Albert , M. Auger , D. J. Auty , I. Badhrees , P. S. Barbeau , L. Bartoszek , E. Baussan , V. Belov , C. Benitez-Medina , T. Bhatta , M. Breidenbach , T. Brunner , G. F. Cao , W. R. Cen , C. Chambers , B. Cleveland , R. Conley , S. Cook , M. Coon , W. Craddock , A. Craycraft , W. Cree , T. Daniels , L. Darroch , S. J. Daugherty , J. Daughhetee , C. G. Davis , J. Davis , S. Delaquis , A. Der Mesrobian-Kabakian , R. deVoe , T. Didberidze , J. Dilling , A. Dobi , A. G. Dolgolenko , M. J. Dolinski , M. Dunford , J. Echevers , L. Espic , W. Fairbank , D. Fairbank , J. Farine , W. Feldmeier , S. Feyzbakhsh , P. Fierlinger , K. Fouts , D. Franco , D. Freytag , D. Fudenberg , P. Gautam , G. Giroux , R. Gornea , K. Graham , G. Gratta , C. Hagemann , C. Hall , K. Hall , G. Haller , E. V. Hansen , C. Hargrove , R. Herbst , S. Herrin , J. Hodgson , M. Hughes , A. Iverson , A. Jamil , C. Jessiman , M. J. Jewell , A. Johnson , T. N. Johnson , S. Johnston , A. Karelin , L. J. Kaufman , R. Killick , T. Koffas , S. Kravitz , R. Krücken , A. Kuchenkov , K. S. Kumar , Y. Lan , A. Larson , D. S. Leonard , F. Leonard , F. LePort , G. S. Li , S. Li , Z. Li , C. Licciardi , Y. H. Lin , D. Mackay , R. MacLellan , M. Marino , J. -M. Martin , Y. Martin , T. McElroy , K. McFarlane , T. Michel , B. Mong , D. C. Moore , K. Murray , R. Neilson , O. Njoya , O. Nusair , K. O'Sullivan , A. Odian , I. Ostrovskiy , C. Ouellet , A. Piepke , A. Pocar , C. Y. Prescott , K. Pushkin , F. Retiere , A. Rivas , A. L. Robinson , E. Rollin , P. C. Rowson , M. P. Rozo , J. Runge , J. J. Russell , S. Schmidt , A. Schubert , D. Sinclair , K. Skarpaas , S. Slutsky , E. Smith , A. K. Soma , V. Stekhanov , V. Strickland , M. Swift , M. Tarka , J. Todd , T. Tolba , D. Tosi , T. I. Totev , R. Tsang , K. Twelker , B. Veenstra , V. Veeraraghavan , J. -L. Vuilleumier , J. -M. Vuilleumier , M. Wagenpfeil , A. Waite , J. Walton , T. Walton , K. Wamba , J. Watkins , M. Weber , L. J. Wen , U. Wichoski , M. Wittgen , J. Wodin , J. Wood , G. Wrede , S. X. Wu , Q. Xia , L. Yang , Y. -R. Yen , O. Ya Zeldovich , T. Ziegler

Neutrinoless double beta decay is a lepton-number violating process predicted by many extensions of the standard model. It is actively searched for in several candidate isotopes within many experimental projects. The status of the…

Instrumentation and Detectors · Physics 2014-06-27 Luciano Pandola

The continuous spectrum of double beta decay ($\beta\beta$) provides a sensitive probe to test the predictions of the standard model and to search for signatures of new physics beyond it. We present a comprehensive analysis of the…

Nuclear Experiment · Physics 2026-04-29 PandaX Collaboration , Zhe Yuan , Zihao Bo , Wei Chen , Xun Chen , Yunhua Chen , Chen Cheng , Xiangyi Cui , Manna Deng , Yingjie Fan , Deqing Fang , Xuanye Fu , Zhixing Gao , Yujie Ge , Lisheng Geng , Karl Giboni , Xunan Guo , Xuyuan Guo , Zichao Guo , Chencheng Han , Ke Han , Changda He , Jinrong He , Houqi Huang , Junting Huang , Yule Huang , Ruquan Hou , Xiangdong Ji , Yonglin Ju , Xiaorun Lan , Chenxiang Li , Jiafu Li , Mingchuan Li , Peiyuan Li , Shuaijie Li , Tao Li , Yangdong Li , Zhiyuan Li , Qing Lin , Jianglai Liu , Yuanchun Liu , Congcong Lu , Xiaoying Lu , Lingyin Luo , Yunyang Luo , Yugang Ma , Yajun Mao , Yue Meng , Binyu Pang , Ningchun Qi , Zhicheng Qian , Xiangxiang Ren , Dong Shan , Xiaofeng Shang , Xiyuan Shao , Guofang Shen , Manbin Shen , Wenliang Sun , Xuyan Sun , Yi Tao , Yueqiang Tian , Yuxin Tian , Anqing Wang , Guanbo Wang , Hao Wang , Haoyu Wang , Jiamin Wang , Lei Wang , Meng Wang , Qiuhong Wang , Shaobo Wang , Shibo Wang , Siguang Wang , Wei Wang , Xu Wang , Zhou Wang , Yuehuan Wei , Weihao Wu , Yuan Wu , Mengjiao Xiao , Xiang Xiao , Kaizhi Xiong , Jianqin Xu , Yifan Xu , Shunyu Yao , Binbin Yan , Xiyu Yan , Yong Yang , Peihua Ye , Chunxu Yu , Ying Yuan , Youhui Yun , Xinning Zeng , Minzhen Zhang , Peng Zhang , Shibo Zhang , Siyuan Zhang , Shu Zhang , Tao Zhang , Wei Zhang , Yang Zhang , Yingxin Zhang , Yuanyuan Zhang , Li Zhao , Kangkang Zhao , Jifang Zhou , Jiaxu Zhou , Jiayi Zhou , Ning Zhou , Xiaopeng Zhou , Zhizhen Zhou , Chenhui Zhu , Dong-Liang Fang , Yu-Feng Li

We present results on the search for double-electron capture ($2\nu\text{ECEC}$) of $^{124}$Xe and neutrinoless double-$\beta$ decay ($0\nu\beta\beta$) of $^{136}$Xe in XENON1T. We consider captures from the K- up to the N-shell in the…

High Energy Physics - Experiment · Physics 2022-09-07 E. Aprile , K. Abe , F. Agostini , S. Ahmed Maouloud , M. Alfonsi , L. Althueser , B. Andrieu , E. Angelino , J. R. Angevaare , V. C. Antochi , D. Antón Martin , F. Arneodo , L. Baudis , A. L. Baxter , L. Bellagamba , R. Biondi , A. Bismark , A. Brown , S. Bruenner , G. Bruno , R. Budnik , C. Cai , C. Capelli , J. M. R. Cardoso , D. Cichon , M. Clark , A. P. Colijn , J. Conrad , J. J. Cuenca-García , J. P. Cussonneau , V. D'Andrea , M. P. Decowski , P. Di Gangi , S. Di Pede , A. Di Giovanni , R. Di Stefano , S. Diglio , K. Eitel , A. Elykov , S. Farrell , A. D. Ferella , H. Fischer , W. Fulgione , P. Gaemers , R. Gaior , A. Gallo Rosso , M. Galloway , F. Gao , R. Glade-Beucke , L. Grandi , J. Grigat , M. Guida , A. Higuera , C. Hils , L. Hoetzsch , J. Howlett , M. Iacovacci , Y. Itow , J. Jakob , F. Joerg , A. Joy , N. Kato , M. Kara , P. Kavrigin , S. Kazama , M. Kobayashi , G. Koltman , A. Kopec , H. Landsman , R. F. Lang , L. Levinson , I. Li , S. Li , S. Liang , S. Lindemann , M. Lindner , K. Liu , J. Loizeau , F. Lombardi , J. Long , J. A. M. Lopes , Y. Ma , C. Macolino , J. Mahlstedt , A. Mancuso , L. Manenti , A. Manfredini , F. Marignetti , T. Marrodán Undagoitia , K. Martens , J. Masbou , D. Masson , E. Masson , S. Mastroianni , M. Messina , K. Miuchi , K. Mizukoshi , A. Molinario , S. Moriyama , K. Morå , Y. Mosbacher , M. Murra , J. Müller , K. Ni , U. Oberlack , B. Paetsch , J. Palacio , R. Peres , J. Pienaar , M. Pierre , V. Pizzella , G. Plante , J. Qi , J. Qin , D. Ramírez García , S. Reichard , A. Rocchetti , N. Rupp , L. Sanchez , J. M. F. dos Santos , I. Sarnoff , G. Sartorelli , J. Schreiner , D. Schulte , P. Schulte , H. Schulze Eißing , M. Schumann , L. Scotto Lavina , M. Selvi , F. Semeria , P. Shagin , S. Shi , E. Shockley , M. Silva , H. Simgen , A. Takeda , P. -L. Tan , A. Terliuk , D. Thers , F. Toschi , G. Trinchero , C. Tunnell , F. Tönnies , K. Valerius , G. Volta , Y. Wei , C. Weinheimer , M. Weiss , D. Wenz , C. Wittweg , T. Wolf , Z. Xu , M. Yamashita , L. Yang , J. Ye , L. Yuan , G. Zavattini , S. Zerbo , M. Zhong , T. Zhu

We report the observation of two-neutrino double-beta decay in Xe-136 with T_1/2 = 2.11 +- 0.04 (stat.) +- 0.21 (sys.) x 10^21 yr. This second order process, predicted by the Standard Model, has been observed for several nuclei but not for…

$^{134}$Xe is a candidate isotope for neutrinoless double beta decay~($0\nu\beta\beta$) search. In addition, the two-neutrino case ($2\nu\beta\beta$) allowed by the Standard Model of particle physics has not yet been observed. Utilizing the…

The search for neutrinoless double-beta decay (0{\nu}{\beta}{\beta}) requires extremely low background and a good understanding of their sources and their influence on the rate in the region of parameter space relevant to the…

Liquid xenon (LXe) is employed in a number of current and future detectors for rare event searches. We use the EXO-200 experimental data to measure the absolute scintillation and ionization yields generated by $\gamma$ interactions from…