论文标题
在$ \ sqrt {s} = $ 13 tev中，搜索单一和成对生产的leptoquarks耦合到Proton-Proton碰撞中的第三代费米子
Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at $\sqrt{s} =$ 13 TeV
论文作者
论文摘要
提出了搜索单独产生的链球菌，并在质子 - 蛋白质碰撞中成对搜索。我们认为Leptoquark（LQ）是充电的标量粒子-1/3 $ e $耦合到顶级夸克和Tau Lepton（$ \ Mathrm {t}τ$）或底部夸克以及中微子（$ \ Mathrm {b} n $），或电费$ \ mathrm {t}ν$或$ \ mathrm {b}τ$。这些选择是由可以解释在B Meson衰变测量中观察到的一系列异常的模型来激励的。 In this analysis the signatures $\mathrm{t}τν\mathrm{b}$ and $\mathrm{t}τν$ are probed, using data recorded by the CMS experiment at the CERN LHC at $\sqrt{s} =$ 13 TeV and that correspond to an integrated luminosity of 137 fb$^{-1}$.这些签名以前尚未在专门的搜索中探讨。发现数据与标准模型预测一致。在95％置信水平的下限范围内设置了0.98-1.73 TEV的LQ质量，具体取决于LQ旋转及其耦合$λ$与Lepton和Quark的耦合，并假设考虑了两种LQ衰减模式的分支分支相等。这些是迄今为止在这种情况下leptoquarks存在的最严格的约束。
A search for leptoquarks produced singly and in pairs in proton-proton collisions is presented. We consider the leptoquark (LQ) to be a scalar particle of charge -1/3$e$ coupling to a top quark plus a tau lepton ($\mathrm{t}τ$) or a bottom quark plus a neutrino ($\mathrm{b}ν$), or a vector particle of charge +2/3$e$, coupling to $\mathrm{t}ν$ or $\mathrm{b}τ$. These choices are motivated by models that can explain a series of anomalies observed in the measurement of B meson decays. In this analysis the signatures $\mathrm{t}τν\mathrm{b}$ and $\mathrm{t}τν$ are probed, using data recorded by the CMS experiment at the CERN LHC at $\sqrt{s} =$ 13 TeV and that correspond to an integrated luminosity of 137 fb$^{-1}$. These signatures have not been previously explored in a dedicated search. The data are found to be in agreement with the standard model prediction. Lower limits at 95% confidence level are set on the LQ mass in the range 0.98-1.73 TeV, depending on the LQ spin and its coupling $λ$ to a lepton and a quark, and assuming equal branching fractions for the two LQ decay modes considered. These are the most stringent constraints to date on the existence of leptoquarks in this scenario.
