Leptoquark Contribution to the Higgs Boson Production at the LHC Collider

TL;DR

This paper investigates how a light scalar leptoquark could enhance Higgs boson production at the LHC, showing that certain parameter choices lead to significantly increased cross-sections compared to the Standard Model.

Contribution

It introduces a comprehensive effective Lagrangian for scalar leptoquarks and calculates their impact on Higgs production cross-section at the LHC.

Findings

Leptoquarks can significantly increase Higgs production cross-section.

The effect depends on the leptoquark mass and coupling parameters.

Enhanced cross-section occurs for moderate coupling and masses around a few hundred GeV.

Abstract

In this report we study how a light-scalar leptoquark could affect the Higgs boson production cross-section at the LHC collider. We construct the most general renormalizable and gauge invariant effective Lagrangian involving the standard model particles and a scalar, isoscalar leptoquark, \eta. The total cross-section for pp -> H+X is then calculated for different values of the unknown parameters \lambda_eta, m_eta and m_H.(Here \lambda_eta is the coupling associated with the Higgs-leptoquark interaction.) We find that if \lambda_eta is moderately large and m_eta is around a few hundred GeV, then the cross-section is significantly larger than the standard model value.