Final results on the neutrino magnetic moment from the MUNU experiment
Final results on the neutrino magnetic moment from the MUNU experiment
复制标题
DOI：
10.1016/j.physletb.2005.04.030
复制
发表时间：
2005-06-02
影响因子：
4.4
通讯作者：
Zacek, V
中科院分区：
文献类型：
--
作者：
Daraktchieva, Z;Amsler, C;Zacek, V
MUNU探测器旨在研究低能下的反电子偶素（$\bar{\upsilon}$）$e^-$弹性散射。其核心部件是一个充满四氟化碳气体的时间投影室，周围环绕着一个反康普顿探测器。该实验是在法国比热核反应堆进行的。在这封信中，我们展示了在3巴和1巴压力下记录的数据的最终分析结果。反冲电子的能量和散射角都被测量。从3巴的数据中，在90%置信水平下得出了中微子磁矩$\mu_{e}$的一个新的上限，即$\mu_{e} < 9\times10^{-11}\mu_{B}$。在1巴压力下，低至150 keV的电子径迹被重建，这展示了该实验技术在低能中微子物理未来应用中的潜力。（c）2005爱思唯尔有限公司。保留所有权利。
The MUNU detector was designed to study (upsilon) over bar (e)e(-) elastic scattering at low energy. The central component is a Time Projection Chamber filled with CF4 gas, surrounded by an anti-Compton detector. The experiment was carried out at the Bugey (France) nuclear reactor. In this Letter we present the final analysis of the data recorded at 3 bar and 1 bar pressure. Both the energy and the scattering angle of the recoil electron are measured. From the 3 bar data a new upper limit on the neutrino magnetic moment mu(short)(e) < 9 x 10(-11) mu(B) at 90% CL was derived. At 1 bar electron tracks down to 150 keV were reconstructed, demonstrating the potentiality of the experimental technique for future applications in low energy neutrino physics. (c) 2005 Elsevier B.V. All rights reserved.