Procedure for short-lived particle detection in the OPERA experiment and its application to charm decays
Procedure for short-lived particle detection in the OPERA experiment and its application to charm decays
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DOI：
10.1140/epjc/s10052-014-2986-0
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发表时间：
2014-08-07
影响因子：
4.4
通讯作者：
Zghiche, A.
中科院分区：
文献类型：
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作者：
Agafonova, N.;Aleksandrov, A.;Zghiche, A.
OPERA实验旨在通过检测在nu（tau）带电电流相互作用中产生的tau轻子，首次观察nu（mu）-> nu（tau）振荡的出现模式，收集了2008年至2012年的数据。在本文中，开发的程序来检测tau粒子衰变，发生在1毫米的顺序从中微子相互作用点的距离，详细描述和适用于寻找迷人的强子，表现出类似的衰变拓扑结构的tau轻子。在分析的样品中，观察到50个粲衰变候选事件，而预期为54 +/- 4，证明探测器性能和应用于中微子事件的分析链被OPERA模拟很好地再现，从而验证了nu（tau）外观检测的方法。
The OPERA experiment, designed to perform the first observation of nu(mu) -> nu(tau) oscillations in appearance mode through the detection of the tau leptons produced in nu(tau) charged current interactions, has collected data from 2008 to 2012. In the present paper, the procedure developed to detect tau particle decays, occurring over distances of the order of 1 mm from the neutrino interaction point, is described in detail and applied to the search for charmed hadrons, showing similar decay topologies as the tau lepton. In the analysed sample, 50 charm decay candidate events are observed while 54 +/- 4 are expected, proving that the detector performance and the analysis chain applied to neutrino events are well reproduced by the OPERA simulation and thus validating the methods for nu(tau) appearance detection.