Collider signature of $U_1$ Leptoquark and constraints from $b\to c$ observables

TL;DR

This paper investigates the collider signatures and constraints of a vector leptoquark $U_1$ that could explain anomalies in $b o c$ and $b o s$ processes, combining collider analysis with flavor observable effects.

Contribution

It provides the first combined collider and flavor observable analysis of the $U_1$ leptoquark addressing $b o c$ and $b o s$ anomalies.

Findings

Derived exclusion limits on $U_1$ mass at 95% C.L. for current and future LHC runs.

Calculated the impact of $U_1$ on $b o c$ observables.

Identified multijet + missing energy as a key collider signature.

Abstract

One of the most popular models that is known to be able to solve the lepton flavour universality violating charged ($b\to c$) and neutral current ($b\to s$) anomalies is the Leptoquark Model. In this work we examine the {\it multijet} + $\mET$ collider signature of a vector leptoquark ($U_1$) which has the potential to mediate both the charged and neutral current processes at tree level. From our collider analysis we derive the exclusion limits on mass for the $U_1$ leptoquark at 95\% C.L. at the current and future experiment of the Large Hadron Collider. We also calculate the effect of such a leptoquark in $b\to c$ observables.