Constraining flavoured leptoquarks with LHC and LFV

TL;DR

This paper investigates constraints on flavoured leptoquark models using LHC data and LFV processes, establishing lower bounds on leptoquark masses across various flavour scenarios.

Contribution

It provides the first comprehensive analysis of flavoured leptoquark parameter space constraints combining collider and LFV data.

Findings

Lower bounds on leptoquark masses vary by flavour scenario.

Constraints depend on leptoquark type and coupling hierarchies.

Certain models are strongly constrained by current LHC and LFV data.

Abstract

We consider the framework of flavoured leptoquarks, in models with scalar or vector leptoquarks, and look for constraints to the parameter space of these models. Using primarily direct searches at the Large Hadron Collider (LHC) and precision processes that probe Lepton Flavour Violation (LFV), we present lower bounds for the masses of the leptoquarks in different flavoured scenarios. We classify the models according to the specific leptoquark, distinguished with respect to their couplings to charged leptons (lepton isolation, two-columned patterns) and in scenarios with specific hierarchies in the couplings (hierarchical, 2-3 democratic, and flipped).