Searching for third-generation composite leptoquarks at the LHC

TL;DR

This paper investigates third-generation scalar leptoquarks predicted by composite models, analyzing their couplings, production, and decay at the LHC to guide experimental searches for these particles.

Contribution

It provides a comprehensive analysis of scalar leptoquark couplings and outlines search strategies for their detection at the LHC, focusing on third-generation interactions.

Findings

Scalar leptoquarks can have masses as low as a few hundred GeV.

Dominant couplings are to third-generation quarks and leptons.

Proposed search strategies for LHC experiments.

Abstract

Fermion masses may arise via mixing of elementary fermions with composite fermions of a strong sector in scenarios of strongly-coupled electroweak symmetry breaking. The strong sector may contain leptoquark states with masses as light as several hundred GeV. In the present study we focus on the scalar modes of such leptoquarks since their bosonic couplings are determined completely and hence their production cross sections only depend on their masses. We study all the possible gauge-invariant non-derivative and single-derivative couplings of the scalar leptoquarks to the quarks and leptons, which turn out to be, predominantly, of the third generation. We examine their phenomenology and outline search strategies for their dominant decay modes at the LHC.