论文标题
增强矢量leptoquark搜索，以增强顶部
Boosting vector leptoquark searches with boosted tops
论文作者
论文摘要
在LHC上，TEV规模的Leptoquark（LQ）占据了顶级夸克（$ t $）的衰减（$ t $）和轻电荷的Lepton（$ \ ell = e，μ$）将形成\ emph {boosted-boosted- $ t $ $ t $ $+$+$+$+$+$ p _ $ p _ {我们考虑了Buchmüller-Rückl-Wyler分类中的所有可能的向量LQ模型，并带有所需的衰减。我们提出了适合自下而上/实验研究的简单现象学Lagrangian，同时可以涵盖这些模型的相关参数空间。在这个简化的框架中，我们研究了LHC的矢量LQ的一对和单个生产渠道。有趣的是，我们发现，与一对生产一样，某些单个生产过程的横截面也取决于Gluon-vector LQ耦合中出现的参数$κ$。我们采用了一种搜索策略，以选择至少一个增强的Hadronic顶级夸克，而恰好是两个高$ p _ {\ rm t} $ leptons具有相同风味和相反符号的事件。这结合了这对中的事件和单个生产过程，因此可以增强发现潜力超出纯生产搜索的潜力。对于$5σ$发现，我们发现可以在$ t \ ell $ decay模式下以$ 100 \％$的分支比率进行探测vector lqs $ 2.55 $ tev，$ 100 \％$ brainding率和$ \ nathcal {o}（o}（1）$新耦合，以$ 14 $ $ 14 $ $ 14 $ 14 $ 3 $ ab ab^$ 3 $ ab ab^$ ab^ab^ab^{ - 1} $的unement formated intement $^{ - 1} $。
At the LHC, a TeV-scale leptoquark (LQ) that decays dominantly to a top quark ($t$) and a light charged lepton ($\ell=e,μ$) would form a resonance system of \emph{boosted-$t$ $+$ high-$p_{\rm T}$-$\ell$}. We consider all possible vector LQ models within the Buchmüller-Rückl-Wyler classifications with the desired decay. We propose simple phenomenological Lagrangians that are suitable for bottom-up/experimental studies and, at the same time, can cover the relevant parameter spaces of these models. In this simplified framework, we study the pair and single production channels of vector LQs at the LHC. Interestingly, we find that, like the pair production, the cross sections of some single production processes also depend on the parameter $κ$ that appears in the gluon-vector LQ coupling. We adopt a search strategy of selecting events with at least one boosted hadronic top quark and exactly two high-$p_{\rm T}$ leptons of the same flavor and opposite sign. This combines events from the pair and single production processes and, therefore, can enhance the discovery potential beyond that of the pair-production-only searches. For $5σ$ discovery we find that vector LQs can be probed up to $2.55$ TeV for $100\%$ branching ratio in the $t\ell $ decay mode and $\mathcal{O}(1)$ new couplings at the $14$ TeV LHC with $3$ ab$^{-1}$ of integrated luminosity.
