论文标题
在最终状态下，搜索$τ$ leptons的超对称合作伙伴的直接生产，两个强调衰减的$τ$ leptons，在$ \ sqrt {s} $ = 13 TEV中搜索质子 - 普罗顿碰撞中缺少横向动量
Search for direct pair production of supersymmetric partners of $τ$ leptons in the final state with two hadronically decaying $τ$ leptons and missing transverse momentum in proton-proton collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
介绍了搜索直接生产一对$τ$ Slectons，即$τ$ leptons的超对称合作伙伴。假定每个$τ$ Sleepton都会腐烂到$τ$ Lepton和最轻的超对称粒子（LSP），该粒子（LSP）被认为是稳定的，并且在检测器中不相互作用，从而导致总重建的横向动量失衡。该搜索是在包含两个$τ$ lept子的事件中进行的，每个lept子都会腐烂到一个或多个Hadron和一个中微子和明显的横向动量不平衡。除了$τ$ Sleeptons衰减的场景外，搜索还解决了$τ$ Slectons具有足够长的寿命以引起非prompt $τ$ Leptons的场景。该数据是在2016 - 2018年在CERN LHC的13个TEV的质子质量碰撞中收集的，并对应于138 fb $^{ - 1} $的集成光度。对于标准模型期望，没有明显的过量。在简化模型的框架内获得了$τ$ Slectons的横截面上的上限。在$τ$ sleptons的情况下，左撇子$τ$ leptons的超级零件，每个人都会迅速衰减到$τ$ Lepton和几乎无质量的LSP，$τ$ Slepton Masses在115至340 GEV之间。在$τ$ sleptons的寿命对应于$cτ_0$ = 0.1毫米的情况下，其中$τ_{0} $代表$τ$ Slecton的平均适当寿命，大众在150至220 GEV之间被排除在外。
A search for the direct production of a pair of $τ$ sleptons, the supersymmetric partners of $τ$ leptons, is presented. Each $τ$ slepton is assumed to decay to a $τ$ lepton and the lightest supersymmetric particle (LSP), which is assumed to be stable and to not interact in the detector, leading to an imbalance in the total reconstructed transverse momentum. The search is carried out in events identified as containing two $τ$ leptons, each decaying to one or more hadrons and a neutrino, and significant transverse momentum imbalance. In addition to scenarios in which the $τ$ sleptons decay promptly, the search also addresses scenarios in which the $τ$ sleptons have sufficiently long lifetimes to give rise to nonprompt $τ$ leptons. The data were collected in proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC with the CMS detector in 2016-2018, and correspond to an integrated luminosity of 138 fb$^{-1}$. No significant excess is seen with respect to standard model expectations. Upper limits on cross sections for the pair production of $τ$ sleptons are obtained in the framework of simplified models. In a scenario in which the $τ$ sleptons are superpartners of left-handed $τ$ leptons, and each undergoes a prompt decay to a $τ$ lepton and a nearly massless LSP, $τ$ slepton masses between 115 and 340 GeV are excluded. In a scenario in which the lifetime of the $τ$ sleptons corresponds to $cτ_0$ = 0.1 mm, where $τ_{0}$ represents the mean proper lifetime of the $τ$ slepton, masses between 150 and 220 GeV are excluded.
