论文标题
在proton-proton碰撞中，在最终状态下搜索最终状态下的成对生产的矢量样瘦素，在$ \ sqrt {s} $ = 13 tev中搜索proton-proton碰撞中的至少三个b夸克喷射
Search for pair-produced vector-like leptons in final states with third-generation leptons and at least three b quark jets in proton-proton collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
在“ 4321模型”的上下文中，对类似矢量的卵子（VLL）进行了首次搜索，这是一种紫外线完整模型，有可能解释与标准模型预测有张力的现有B物理测量值。分析的数据在2017年和2018年记录了96.5 fb $^{ - 1} $的集成发光度，而在质子 - proton碰撞中的CMS检测器$ \ sqrt {s} $ = 13 tev。考虑到$ {\ geq} $ 3 b标记的喷气机和两个第三代瘦素（$ττ$，$τν_τ$或$ν_τν_τ$）的最终状态。上限是在VLL质量范围500-1050 GEV的VLL生产横截面上得出的。对于代表性的600 GEV的代表性VLL质量点，最大似然拟合在2.8标准偏差的水平上的存在更喜欢信号的存在。结果，观察到的上限大约是预期限制的两倍。
The first search is presented for vector-like leptons (VLLs) in the context of the "4321 model", an ultraviolet-complete model with the potential to explain existing B physics measurements that are in tension with standard model predictions. The analyzed data, corresponding to an integrated luminosity of 96.5 fb$^{-1}$, were recorded in 2017 and 2018 with the CMS detector at the LHC in proton-proton collisions at $\sqrt{s}$ = 13 TeV. Final states with ${\geq}$ 3 b-tagged jets and two third-generation leptons ($ττ$, $τν_τ$, or $ν_τν_τ$) are considered. Upper limits are derived on the VLL production cross section in the VLL mass range 500-1050 GeV. The maximum likelihood fit prefers the presence of signal at the level of 2.8 standard deviations, for a representative VLL mass point of 600 GeV. As a consequence, the observed upper limits are approximately double the expected limits.
