Observation of a first vτ candidate event in the OPERA experiment in the CNGS beam
Observation of a first vτ candidate event in the OPERA experiment in the CNGS beam
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DOI：
10.1016/j.physletb.2010.06.022
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发表时间：
2010-07-26
影响因子：
4.4
通讯作者：
Zimmermann, R.
中科院分区：
文献类型：
--
作者：
Agafonova, N.;Aleksandrov, A.;Zimmermann, R.
位于格兰萨索地下实验室（LNGS）的OPERA中微子探测器被设计用于通过研究v（mu）-> v（tau）通道，首次以直接出现模式探测中微子振荡。该混合装置由一个乳胶/铅靶组成，辅以电子探测器，它被放置在高能长基线CERN到LNGS束（CNGS）730公里以外的中微子源。在2008年和2009年成功地进行了CNGS中微子探测。在简要描述了束流、实验装置和用于分析中微子事件的程序之后，我们描述了满足运动学选择标准的第一个候选v（tau）带电电流事件的拓扑结构和运动学。详细解释了背景计算及其交叉检查，并评估了事件的重要性。(C)2010 Elsevier B. V.保留所有权利。
The OPERA neutrino detector in the underground Gran Sasso Laboratory (LNGS) has been designed to perform the first detection of neutrino oscillations in direct appearance mode through the study of the v(mu) -> v(tau) channel. The hybrid apparatus consists of an emulsion/lead target complemented by electronic detectors and it is placed in the high energy long-baseline CERN to LNGS beam (CNGS) 730 km away from the neutrino source. Runs with CNGS neutrinos were successfully carried out in 2008 and 2009. After a brief description of the beam, the experimental setup and the procedures used for the analysis of the neutrino events, we describe the topology and kinematics of a first candidate v(tau) charged-current event satisfying the kinematical selection criteria. The background calculations and their cross-check are explained in detail and the significance of the event is assessed. (C) 2010 Elsevier B.V. All rights reserved.