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arXiv 1801.07641hep-phhep-ex
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用于精密对撞机研究的轻夸克工具箱

Leptoquark toolbox for precision collider studies

Ilja Doršner, Admir Greljo

备注：
18 pages, 5 figures, 3 tables. Version published in JHEP
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摘要：

我们实现标量和矢量leptoquark（LQ）模型的通用费因律输出（UFO）格式假设标准模型费米子内容和重子和轻子数守恒。标量LQ实现包括次首阶（NLO）QCD校正。我们报告了在13 TeV，14 TeV和27 TeV的质子-质子碰撞中所有壳层LQ产生过程的NLO QCD包容截面。这些包括所有初始夸克味（$u$、$d$、$s$、$c$和$b$）的（i）LQ对产生（$p p \to ΦΦ$）和（ii）单个LQ +轻子产生（$p p \to Φ\ell$）。矢量LQ实现包括可调非最小QCD耦合。我们讨论了几个方面的LQ搜索在强子对撞机，强调的影响$SU(2)$规范不变性，电弱和风味的限制，可能的签名。最后，我们概述了最近文献中提出的解决$B$介子衰变实验异常的高$p_T$ LQ搜索策略。在这种情况下，我们强调的重要性，三个LQ相关的过程，即$p p \to ΦΦ$，$p p \to Φ\ell$，和$p p \to \ell \ell$的互补性。

英文摘要：

We implement scalar and vector leptoquark (LQ) models in the universal FeynRules output (UFO) format assuming the Standard Model fermion content and conservation of baryon and lepton numbers. Scalar LQ implementations include next-to-leading order (NLO) QCD corrections. We report the NLO QCD inclusive cross sections in proton-proton collisions at 13 TeV, 14 TeV, and 27 TeV for all on-shell LQ production processes. These comprise (i) LQ pair production ($p p \to ΦΦ$) and (ii) single LQ + lepton production ($p p \to Φ\ell$) for all initial quark flavours ($u$, $d$, $s$, $c$, and $b$). Vector LQ implementation includes adjustable non-minimal QCD coupling. We discuss several aspects of LQ searches at a hadron collider, emphasising the implications of $SU(2)$ gauge invariance, electroweak and flavour constraints, on the possible signatures. Finally, we outline the high-$p_T$ search strategy for LQs recently proposed in the literature to resolve experimental anomalies in $B$-meson decays. In this context, we stress the importance of complementarity of the three LQ related processes, namely, $p p \to ΦΦ$, $p p \to Φ\ell$, and $p p \to \ell \ell$.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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