Minimal Flavour Violation for Leptoquarks

TL;DR

This paper explores the implications of minimal flavor violation in scalar leptoquarks, estimating rare decay rates and identifying promising collider search channels based on flavor structure assumptions.

Contribution

It introduces a framework for analyzing leptoquark interactions under minimal flavor violation, providing estimates for rare decay processes and highlighting top quark decay channels as promising for searches.

Findings

Leptoquark decay to top quarks is a promising search channel.

Rare decay rates depend on the flavor structure of leptoquark couplings.

Minimal flavor violation constrains leptoquark interactions and decay modes.

Abstract

Scalar leptoquarks, with baryon and lepton number conserving interactions, could have TeV scale masses, and be produced at colliders or contribute to a wide variety of rare decays. In pursuit of some insight as to the most sensitive search channels, We assume that the leptoquark-lepton-quark coupling can be constructed from the known mass matrices. We estimate the rates for selected rare processes in three cases: leptoquarks carrying lepton and quark flavour, leptoquarks with quark flavour only, and unflavoured leptoquarks. We find that leptoquark decay to top quarks is an interesting search channel.