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The GERDA experiment searches for the lepton number violating neutrinoless double beta decay of $^{76}$Ge ($^{76}$Ge $\rightarrow$ $^{76}$Se + 2e$^-$) operating bare Ge diodes with an enriched $^{76}$Ge fraction in liquid argon. The…

Nuclear Experiment · Physics 2018-03-30 M. Agostini , A. M. Bakalyarov , M. Balata , I. Barabanov , L. Baudis , C. Bauer , E. Bellotti , S. Belogurov , A. Bettini , L. Bezrukov , J. Biernat , T. Bode , D. Borowicz , V. Brudanin , R. Brugnera , A. Caldwell , C. Cattadori , A. Chernogorov , T. Comellato , V. D'Andrea , E. V. Demidova , N. Di Marco , A. Domula , E. Doroshkevich , V. Egorov , R. Falkenstein , A. Gangapshev , A. Garfagnini , P. Grabmayr , V. Gurentsov , K. Gusev , J. Hakenmüller , A. Hegai , M. Heisel , S. Hemmer , R. Hiller , W. Hofmann , M. Hult , L. V. Inzhechik , J. Janicskó Csáthy , J. Jochum , M. Junker , V. Kazalov , Y. Kermaidic , T. Kihm , I. V. Kirpichnikov , A. Kirsch , A. Kish , A. Klimenko , R. Kneißl , K. T. Knöpfle , O. Kochetov , V. N. Kornoukhov , V. V. Kuzminov , M. Laubenstein , A. Lazzaro , M. Lindner , I. Lippi , A. Lubashevskiy , B. Lubsandorzhiev , G. Lutter , C. Macolino , B. Majorovits , W. Maneschg , M. Miloradovic , R. Mingazheva , M. Misiaszek , P. Moseev , I. Nemchenok , K. Panas , L. Pandola , K. Pelczar , L. Pertoldi , A. Pullia , C. Ransom , S. Riboldi , N. Rumyantseva , C. Sada , F. Salamida , C. Schmitt , B. Schneider , S. Schönert , A-K. Schütz , O. Schulz , B. Schwingenheuer , O. Selivanenko , E. Shevchik , M. Shirchenko , H. Simgen , A. Smolnikov , L. Stanco , L. Vanhoefer , A. A. Vasenko , A. Veresnikova , K. von Sturm , V. Wagner , A. Wegmann , T. Wester , C. Wiesinger , M. Wojcik , E. Yanovich , I. Zhitnikov , S. V. Zhukov , D. Zinatulina , A. Zschocke , A. J. Zsigmond , K. Zuber , G. Zuzel

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…

The background in the region of the Q-value for neutrinoless double beta decay of 76Ge has been investigated by different methods: Simulation with GEANT 4 of the HEIDELBERG-MOSCOW experiment, analysis of other Ge double beta…

High Energy Physics - Phenomenology · Physics 2009-11-10 H. V. Klapdor-Kleingrothaus , A. Dietz , I. V. Krivosheina , C. Doerr , C. Tomei

The occurrence of the neutrinoless decay 0n-bb mode has fundamental consequences: first total lepton number is not conserved, and second, the neutrino is a Majorana particle. Further the effective mass measured allows to put an absolute…

High Energy Physics - Phenomenology · Physics 2007-05-23 Hans Volker Klapdor-Kleingrothaus

The GERDA experiment searches for the neutrinoless double beta decay of Ge-76 using high-purity germanium detectors enriched in Ge-76. The analysis of the signal time structure provides a powerful tool to identify neutrinoless double beta…

Instrumentation and Detectors · Physics 2015-03-17 M. Agostini , C. A. Ur , D. Budjáš , E. Bellotti , R. Brugnera , C. M. Cattadori , A. di Vacri , A. Garfagnini , L. Pandola , S. Schönert

Nuclear $\beta$ decay, a sensitive probe of nuclear structure and weak interactions, has become a precision test bed for physics beyond the Standard Model, driven by recent advances in spectrometric techniques. Here we introduce tomographic…

Nuclear Experiment · Physics 2025-12-02 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 , Marlom Ramalho , Jouni Suhonen

The first evidence for neutrinoless double beta decay has been observed in the HEIDELBERG-MOSCOW experiment, which is the most sensitive double beta decay experiment since ten years. This is the first evidence for lepton number violation…

High Energy Physics - Phenomenology · Physics 2017-08-23 H. V. Klapdor-Kleingrothaus

We investigate several Pb$(n,n'\gamma$) and Ge$(n,n'\gamma$) reactions. We measure $\gamma$-ray production from Pb$(n,n'\gamma$) reactions that can be a significant background for double-beta decay experiments which use lead as a massive…

Nuclear Experiment · Physics 2009-09-29 D. -M. Mei , S. R. Elliott , A. Hime , V. Gehman , K. Kazkaz

GERDA is an experiment designed to look for the neutrinoless double beta decay of Ge-76. The experiment uses an array of high-purity germanium detectors, enriched in Ge-76, directly immersed in liquid argon. GERDA is presently operating…

Data Analysis, Statistics and Probability · Physics 2012-06-26 M. Agostini , L. Pandola , P. Zavarise

LEGEND (Large Enriched Germanium Experiment for Neutrinoless Double-Beta Decay) is a ton-scale experimental program to search for neutrinoless double beta ($0 \nu \beta \beta$) decay using high-purity germanium detectors enriched in the…

Instrumentation and Detectors · Physics 2019-11-15 Michael Willers

The various mechanisms for neutrinoless double beta decay in gauge theories are reviewed and the present experimental data is used to set limits on physics scenarios beyond the standard model. The positive indications for nonzero neutrino…

High Energy Physics - Phenomenology · Physics 2007-05-23 Rabindra N. Mohapatra

Neutrinoless double beta decay (0nubb) is one of the most sensitive probes for physics beyond the Standard Model, providing unique information on the nature of neutrinos. In this paper we review the status and outlook for bolometric 0nubb…

Nuclear Experiment · Physics 2014-04-18 D. R. Artusa , F. T. Avignone , O. Azzolini , M. Balata , T. I. Banks , G. Bari , J. Beeman , F. Bellini , A. Bersani , M. Biassoni , C. Brofferio , C. Bucci , X. Z. Cai , A. Camacho , L. Canonica , X. G. Cao , S. Capelli , L. Carbone , L. Cardani , M. Carrettoni , N. Casali , D. Chiesa , N. Chott , M. Clemenza , C. Cosmelli , O. Cremonesi , R. J. Creswick , I. Dafinei , A. Dally , V. Datskov , A. De Biasi , M. M. Deninno , S. Di Domizio , M. L. di Vacri , L. Ejzak , D. Q. Fang , H. A. Farach , M. Faverzani , G. Fernandes , E. Ferri , F. Ferroni , E. Fiorini , M. A. Franceschi , S. J. Freedman , B. K. Fujikawa , A. Giachero , L. Gironi , A. Giuliani , J. Goett , P. Gorla , C. Gotti , T. D. Gutierrez , E. E. Haller , K. Han , K. M. Heeger , R. Hennings-Yeomans , H. Z. Huang , R. Kadel , K. Kazkaz , G. Keppel , Yu. G. Kolomensky , Y. L. Li , C. Ligi , X. Liu , Y. G. Ma , C. Maiano , M. Maino , M. Martinez , R. H. Maruyama , Y. Mei , N. Moggi , S. Morganti , T. Napolitano , S. Nisi , C. Nones , E. B. Norman , A. Nucciotti , T. O'Donnell , F. Orio , D. Orlandi , J. L. Ouellet , M. Pallavicini , V. Palmieri , L. Pattavina , M. Pavan , M. Pedretti , G. Pessina , V. Pettinacci , G. Piperno , C. Pira , S. Pirro , E. Previtali , V. Rampazzo , C. Rosenfeld , C. Rusconi , E. Sala , S. Sangiorgio , N. D. Scielzo , M. Sisti , A. R. Smith , L. Taffarello , M. Tenconi , F. Terranova , W. D. Tian , C. Tomei , S. Trentalange , G. Ventura , M. Vignati , B. S. Wang , H. W. Wang , L. Wielgus , J. Wilson , L. A. Winslow , T. Wise , A. Woodcraft , L. Zanotti , C. Zarra , B. X. Zhu , S. Zucchelli

Neutrinoless double beta decay would be a key to understanding the nature of neutrino masses. The next generation of High Purity Germanium experiments will have to be operated with a background rate of better than 10^-5 counts/(kg y keV) in…

Instrumentation and Detectors · Physics 2011-05-19 B. Majorovits , I. Abt , M. Laubenstein , O. Volynets

Radiation background studies pertaining to $0\nu\beta\beta$ decay in $^{124}$Sn have been carried out. A TiLES setup has been installed at TIFR for this purpose. Neutron-induced background is studied in the TIN.TIN detector materials using…

Instrumentation and Detectors · Physics 2015-04-22 Neha Dokania , V. Singh , C. Ghosh , S. Mathimalar , A. Garai , S. Pal , V. Nanal , R. G. Pillay , A. Shrivastava , K. G. Bhushan

The GERDA experiment searches for neutrinoless double beta ($0\nu\beta\beta$) decay in $^{76}$Ge using an array of high purity germanium (HPGe) detectors immersed in liquid argon (LAr). Phase II of the experiment uses 30 new broad energy…

Instrumentation and Detectors · Physics 2016-08-06 Björn Lehnert

The search for neutrinoless double beta decay ($0\nu\beta\beta$) is one of the key experiments for determining unresolved properties of neutrinos. Experimental observation of $0\nu\beta\beta$ would provide a clear demonstration of the…

High Energy Physics - Experiment · Physics 2020-04-07 Yong-Hamb Kim

Neutrinoless double-beta decay($0\nu\beta\beta$) decay is a hypothetical process that violates lepton number, and whose observation would unambiguously indicate that neutrinos are Majorana fermions. In the standard inverted-ordering…

Nuclear Experiment · Physics 2019-12-10 I. S. Guinn , J. M. López-Castaño

Nuclear double-beta decays are a unique probe to search for new physics beyond the Standard Model. Still-unknown particles, non-standard interactions, or the violation of fundamental symmetries would affect the decay kinematic, creating…

High Energy Physics - Experiment · Physics 2024-04-25 E. Bossio , M. Agostini

Neutrinoless double beta ($0\nu\beta\beta$) decay, an important low-energy process, serves not only as a potential test of the Majorana nature of neutrinos, but also as a sensitive probe for new physics beyond the Standard Model. In this…

High Energy Physics - Phenomenology · Physics 2025-10-10 Vivek Banerjee , Sasmita Mishra

The GERDA experiment at the Laboratori Nazionali del Gran Sasso (LNGS) searches for the neutrinoless double beta decay of 76-Ge. In view of the GERDA Phase II data collection, four new 228-Th radioactive sources for the calibration of the…