Charged Higgs Pairs at the LHC: A NLO Analysis

TL;DR

This paper provides next-to-leading order QCD predictions for charged Higgs pair production at the LHC within the 2HDM, including all production modes and uncertainty analyses.

Contribution

It offers the first comprehensive NLO QCD analysis of charged Higgs pair production, incorporating multiple production channels and uncertainty quantification.

Findings

QCD corrections significantly reduce scale dependence.

All production modes are included in the analysis.

Predictions enable better interpretation of future experimental data.

Abstract

Charged Higgs-boson pair production at hadron colliders yields information about the trilinear couplings involving charged Higgs fields in extensions of the Standard Model (SM). We consider the type-I two-Higgs doublet model (2HDM) extension and obtain next-to-leading order QCD predictions for the charged-Higgs pair production ($H^+H^-$ production). All production modes, i.e. Drell--Yan-like production, gluon fusion and vector-boson fusion are included in the analysis. We determine uncertainties originating from the scale dependence, the parton-density functions and strong coupling $\alpha_s$ at the LHC. We observe that the QCD corrections lead to a significant reduction of the relative scale dependences. These improved predictions will allow for a quantitative interpretation of experimental measurements, in case that charged Higgs states will be observed.