GERDA 无中微子双β衰变搜寻的最终结果
核实验
2021-01-04 v1 高能物理 - 实验
仪器与探测器
摘要
GERmanium Detector Array（GERDA）实验搜寻了 Ge 的违反轻子数守恒的无中微子双β（）衰变，其发现将在宇宙学与粒子物理中具有深远影响。通过在主动液氩屏蔽中运行富集 Ge 的裸锗二极管，GERDA 在信号区实现了前所未有的低本底指数 counts/(keVkgyr)，并达到了在无本底 regime 下累积 100 kgyr 曝照量的设计目标。与 Phase I 结果合并后，在 127.2 kgyr 总曝照量下未观测到信号。在 90% 置信水平下，对 Ge 中 衰变半衰期的限制设为 yr，与假设无信号的灵敏度一致。
引用
@article{arxiv.2009.06079,
title = {Final Results of GERDA on the Search for Neutrinoless Double-$\beta$ Decay},
author = {GERDA collaboration and M. Agostini and G. R. Araujo 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 V. Biancacci and D. Borowicz and E. Bossio and V. Bothe 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 E. Doroshkevich and F. Fischer and M. Fomina and A. Gangapshev and A. Garfagnini and C. Gooch and P. Grabmayr and V. Gurentsov and K. Gusev and J. Hakenmüller and S. Hemmer and R. Hiller and W. Hofmann and J. Huang and M. Hult and L. V. Inzhechik and J. Janicskó Csáthy and J. Jochum and M. Junker and V. Kazalov and Y. Kermaïdic and H. Khushbakht and T. Kihm and I. V. Kirpichnikov and A. Klimenko and R. Kneißl and K. T. Knöpfle and O. Kochetov and V. N. Kornoukhov and P. Krause 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 L. Manzanillas and M. Miloradovic and R. Mingazheva and M. Misiaszek and P. Moseev and Y. Müller and I. Nemchenok and K. Panas and L. Pandola and K. Pelczar and L. Pertoldi and P. Piseri and A. Pullia and C. Ransom and L. Rauscher and S. Riboldi and N. Rumyantseva and C. Sada and F. Salamida and S. Schönert and J. Schreiner and M. Schütt and A. -K. Schütz and O. Schulz and M. Schwarz and B. Schwingenheuer and O. Selivanenko and E. Shevchik and M. Shirchenko and L. Shtembari and H. Simgen and A. Smolnikov and D. Stukov and A. A. Vasenko and A. Veresnikova and C. Vignoli and K. von Sturm and T. Wester and C. Wiesinger and M. Wojcik and E. Yanovich and B. Zatschler 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:2009.06079},
year = {2021}
}
备注
7 pages, 3 figures, submitted to Physical Review Letters