在质心系能量√s = 13 TeV的质子-质子碰撞中通过μ子-夸克散射产生的标量 leptoquark（LQ）的寻找
Search for scalar leptoquarks produced via muon-quark scattering in proton-proton collisions at $\sqrt{s}$ = 13 TeV
AI总结：
本文利用CMS探测器采集的13 TeV质子-质子碰撞数据，首次寻找μq相互作用产生的TeV标量LQ，排除了广阔参数区域，提升了LQ(uμ)和LQ(bμ)场景的搜索覆盖范围。
AI中文摘要：
本文首次开展了对TeV量级标量 leptoquark（LQ）的寻找，这类LQ通过μ子-夸克（μq）相互作用产生。该分析基于LHC的CMS探测器记录的质心系能量为13 TeV的质子-质子碰撞数据，对应积分亮度为138 fb⁻¹。质子内部的量子涨落会产生带电轻子成分，这使得轻子诱导过程的研究成为可能。具体而言，来自一个碰撞质子的μ子与另一个碰撞质子的夸克发生相互作用，可用于研究单个LQ的共振产生及其随后的衰变。末态包含1个或2个μ子和1个喷注，该喷注可来自轻夸克（u）或b夸克的强子化。主要观测量是μ子-喷注系统的不变质量，其分布在LQ质量处形成峰。研究发现数据与本底预测相符。对LQ产生截面与其衰变至μq末态的分支分数的乘积设定了上限。结果排除了LQ质量与LQ-μq耦合参数平面中的广阔区域，相较于之前的CMS搜索，在LQ(uμ)场景中，扩展了对质量在1.5至3.6 TeV之间、耦合在0.2至0.6之间的LQ的覆盖范围；在LQ(bμ)场景中，扩展了对质量高于1.8 TeV、耦合高于1的LQ的覆盖范围。
英文摘要：
The first search for TeV-scale scalar leptoquarks (LQs) produced in muon-quark ($μ$q) interactions is presented. It is based on proton-proton collision data recorded at a center-of-mass energy of 13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 138 fb$^{-1}$. Quantum fluctuations inside the proton generate charged-lepton components, enabling the study of lepton-induced processes. In particular, the interaction of a muon from one colliding proton with a quark from the other proton enables the study of resonant production of a single LQ and its subsequent decay. The final state includes one or two muons and a jet that can come from the hadronization of either a light quark (u) or a b quark. The primary observable is the invariant mass of the muon-jet system, whose distribution peaks at the LQ mass. The data are found to be in agreement with the background predictions. Upper limits are set on the product of the LQ production cross section and its decay branching fraction to the $μ$q final state. The results exclude broad regions in the parameter plane of the LQ mass and the LQ-$μ$q coupling, improving upon previous CMS searches by extending the coverage for LQs with masses between 1.5 and 3.6 TeV, and couplings between 0.2 and 0.6 for the LQ(u$μ$) scenario; and masses above 1.8 TeV, and couplings above 1 for the LQ(b$μ$) scenario.
