Processes commonly studied at the Large Hadron Collider (LHC) are induced by quarks and gluons inside the protons of the LHC beams. In this Letter, we demonstrate that, since protons also contain leptons, it is possible to target lepton-induced processes at the LHC as well. In particular, by picking a lepton from one beam and a quark from the other beam, we present for the first time a comprehensive analysis of resonant single leptoquark (LQ) production at a hadron collider. In the case of minimal scalar LQs, we derive novel bounds that arise from the LHC Run II considering all possible flavor combinations of an electron or a muon and an up ($u$), a down ($d$), a strange, or a charm quark. For the flavor combinations with a $u$ or a $d$ quark, the obtained limits represent the most stringent constraints to date on LQs of this type. The prospects of our method at future LHC runs are also explored. Given the discovery reach of the proposed LQ signature, we argue that dedicated resonance searches in final states featuring a single light lepton and a single light-flavor jet should be added to the exotics search canon of both the ATLAS and the CMS Collaborations.

中文翻译：

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大型强子对撞机上的轻子-夸克碰撞

在大型强子对撞机（LHC）上通常研究的过程是由LHC束质子内部的夸克和胶子诱发的。在这封信中，我们证明，由于质子也包含轻子，因此有可能在LHC上靶向轻子诱导的过程。特别是，通过从一个光束中拾取一个轻子，从另一个光束中拾取一个夸克，我们首次展示了强子对撞机共振单色夸克（LQ）产生的综合分析。在最小标量LQ的情况下，我们考虑到电子，介子和向上（$ü$），下降（$d$），奇怪或夸克夸克。对于带有$ü$ 或一个 $d$夸克，获得的极限代表了迄今为止对此类LQ的最严格的约束。还探讨了我们的方法在未来大型强子对撞机运行中的前景。考虑到拟议的LQ签名的发现范围，我们认为应在ATLAS和CMS合作的外来搜索标准中添加以单个轻轻子和单个轻味射流为特征的最终状态的专用共振搜索。