Charged Higgs boson production in association with a top quark in MC@NLO

TL;DR

This paper presents a method for calculating charged Higgs boson production with a top quark at the LHC using MC@NLO, addressing different mass regimes and interference issues.

Contribution

It introduces a model-independent approach for NLO plus parton shower calculations of charged Higgs production, applicable across various mass ranges.

Findings

Provides a suitable definition for charged Higgs production mode in NLO context.

Demonstrates example results for the LHC.

Addresses interference with top pair production in the low mass region.

Abstract

We discuss the calculation of charged Higgs boson production in association with top quark in the MC@NLO framework for combining NLO matrix elements with a parton shower. The process is defined in a model independent manner for wide applicability, and can be used if the charged Higgs boson mass is either greater or less than the mass of the top quark. For the latter mass region, care is needed in defining the charged Higgs production mode due to interference with top pair production. We give a suitable definition applicable in an NLO (plus parton shower) context, and present example results for the LHC.