Search for lepton-flavor-violating decays of the Z boson into a t lepton and a light lepton with the ATLAS detector
Search for lepton-flavor-violating decays of the Z boson into a t lepton and a light lepton with the ATLAS detector
复制标题
使用 ATLAS 探测器搜索 Z 玻色子衰变成 t 轻子和轻轻子的轻子味违规衰变
DOI：
10.1103/physrevd.98.092010
复制
发表时间：
2018
影响因子：
5
通讯作者：
Aaboud M
中科院分区：
文献类型：
--
作者：
Aaboud M
用大型强子对撞机的ATLAS探测器直接搜索玻色子衰变中的轻子风味违逆。考虑玻色子衰变为电子或介子和强子衰变轻子。这些搜索是基于ATLAS探测器在2015年和2016年收集的质子-质子碰撞数据样本，对应于质心能量的综合光度。在统计上没有观察到超出预期背景的显著事件，并且在95%的置信水平上设置了违反轻子风味的衰变的分支比率的上限：和。这是对ATLAS数据的第一个限制。该上限与先前基于质心能量为的质子-质子碰撞数据的ATLAS结果相结合，在95%置信水平上的组合上限为。
Direct searches for lepton flavor violation in decays of theboson with the ATLAS detector at the LHC are presented. Decays of theboson into an electron or muon and a hadronically decayinglepton are considered. The searches are based on a data sample of proton-proton collisions collected by the ATLAS detector in 2015 and 2016, corresponding to an integrated luminosity ofat a center-of-mass energy of. No statistically significant excess of events above the expected background is observed, and upper limits on the branching ratios of lepton-flavor-violating decays are set at the 95% confidence level:and. This is the first limit onwith ATLAS data. The upper limit onis combined with a previous ATLAS result based onof proton-proton collision data at a center-of-mass energy ofand the combined upper limit at 95% confidence level is.