GERDA Phase II 对 $^{76}$Ge 无中微子双 β 衰变改进的限值
核实验
2018-03-30 v1 仪器与探测器
摘要
GERDA 实验通过在液氩中运行富集 Ge 比例的裸 Ge 二极管，寻找 Ge (Ge Se + 2e) 的轻子数破坏性无中微子双 β 衰变。与我们之前发布的数据相比，BEGe 型探测器的曝光量增加了两倍。BEGe 探测器通过分析探测器信号的时间分布，具有出色的背景抑制能力。在分析窗口内，实现了 cts/(keVkgyr) 的本底水平；若按能量分辨率归一化，这是任何 0 实验中迄今达到的最低水平。未观察到信号，并且在结合我们之前的数据后，设定了 yr 的半衰期新的 90 \% C.L. 下限。假设无信号时的中位预期灵敏度为 yr。
引用
@article{arxiv.1803.11100,
title = {Improved limit on neutrinoless double beta decay of $^{76}$Ge from GERDA Phase II},
author = {M. Agostini and A. M. Bakalyarov and M. Balata and I. Barabanov and L. Baudis and C. Bauer and E. Bellotti and S. Belogurov and A. Bettini and L. Bezrukov and J. Biernat and T. Bode and D. Borowicz and V. Brudanin and R. Brugnera and A. Caldwell and C. Cattadori and A. Chernogorov and T. Comellato and V. D'Andrea and E. V. Demidova and N. Di Marco and A. Domula and E. Doroshkevich and V. Egorov and R. Falkenstein and A. Gangapshev and A. Garfagnini and P. Grabmayr and V. Gurentsov and K. Gusev and J. Hakenmüller and A. Hegai and M. Heisel and S. Hemmer and R. Hiller and W. Hofmann and M. Hult and L. V. Inzhechik and J. Janicskó Csáthy and J. Jochum and M. Junker and V. Kazalov and Y. Kermaidic and T. Kihm and I. V. Kirpichnikov and A. Kirsch and A. Kish and A. Klimenko and R. Kneißl and K. T. Knöpfle and O. Kochetov and V. N. Kornoukhov and V. V. Kuzminov and M. Laubenstein and A. Lazzaro and M. Lindner and I. Lippi and A. Lubashevskiy and B. Lubsandorzhiev and G. Lutter and C. Macolino and B. Majorovits and W. Maneschg and M. Miloradovic and R. Mingazheva and M. Misiaszek and P. Moseev and I. Nemchenok and K. Panas and L. Pandola and K. Pelczar and L. Pertoldi and A. Pullia and C. Ransom and S. Riboldi and N. Rumyantseva and C. Sada and F. Salamida and C. Schmitt and B. Schneider and S. Schönert and A-K. Schütz and O. Schulz and B. Schwingenheuer and O. Selivanenko and E. Shevchik and M. Shirchenko and H. Simgen and A. Smolnikov and L. Stanco and L. Vanhoefer and A. A. Vasenko and A. Veresnikova and K. von Sturm and V. Wagner and A. Wegmann and T. Wester and C. Wiesinger and M. Wojcik and E. Yanovich and I. Zhitnikov and S. V. Zhukov and D. Zinatulina and A. Zschocke and A. J. Zsigmond and K. Zuber and G. Zuzel},
journal= {arXiv preprint arXiv:1803.11100},
year = {2018}
}
备注
5 pages, 2 figures