使用NEMO 3探测器寻找无中微子双β衰变的初步结果。
First results of the search for neutrinoless double-beta decay with the NEMO 3 detector.
作者信息
Arnold R, Augier C, Baker J, Barabash A, Broudin G, Brudanin V, Caffrey A J, Caurier E, Egorov V, Errahmane K, Etienvre A I, Guyonnet J L, Hubert F, Hubert Ph, Jollet C, Jullian S, Kochetov O, Kovalenko V, Konovalov S, Lalanne D, Leccia F, Longuemare C, Lutter G, Marquet Ch, Mauger F, Nowacki F, Ohsumi H, Piquemal F, Reyss J L, Saakyan R, Sarazin X, Simard L, Simkovic F, Shitov Yu, Smolnikov A, Stekl L, Suhonen J, Sutton C S, Szklarz G, Thomas J, Timkin V, Tretyak V, Umatov V, Vála L, Vanushin I, Vasilyev V, Vorobel V, Vylov Ts
机构信息
IReS, IN2P3-CNRS and ULP, 67037 Strasbourg, France.
出版信息
Phys Rev Lett. 2005 Oct 28;95(18):182302. doi: 10.1103/PhysRevLett.95.182302. Epub 2005 Oct 25.
The NEMO 3 detector, which has been operating in the Fréjus underground laboratory since February 2003, is devoted to the search for neutrinoless double-beta decay (beta beta 0v). The half-lives of the two neutrino double-beta decay (beta beta 2v) have been measured for 100Mo and 82Se. After 389 effective days of data collection from February 2003 until September 2004 (phase I), no evidence for neutrinoless double-beta decay was found from approximately 7 kg of 100Mo and approximately 1 kg of 82Se. The corresponding limits are T1/2(beta beta0v) > 4.6 x 10(23) yr for 100Mo and T1/2(beta beta 0v) > 1.0 x 10(23) yr for 82Se (90% C.L.). Depending on the nuclear matrix element calculation, the limits for the effective Majorana neutrino mass are
NEMO 3探测器自2003年2月起在弗雷瑞斯地下实验室运行，致力于寻找无中微子双β衰变（ββ0v）。已测量了100Mo和82Se的双中微子双β衰变（ββ2v）的半衰期。从2003年2月至2004年9月（第一阶段）进行了389个有效天的数据采集后，在约7千克的100Mo和约1千克的82Se中未发现无中微子双β衰变的证据。相应的限制为100Mo的T1/2（ββ0v）> 4.6×10（23）年，82Se的T1/2（ββ0v）> 1.0×10（23）年（90%置信水平）。根据核矩阵元计算，有效马约拉纳中微子质量的限制为100Mo的
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