Charged-Higgs-boson production at the LHC: NLO supersymmetric QCD corrections

TL;DR

This paper calculates next-to-leading-order supersymmetric QCD corrections for charged-Higgs production at the LHC, improving the accuracy of theoretical predictions for experimental searches.

Contribution

It provides the first NLO supersymmetric QCD corrections for charged-Higgs production via quark and gluon fusion processes at the LHC.

Findings

QCD corrections reduce scale dependence, stabilizing predictions.

NLO results differ significantly from leading-order estimates.

Impacts charged-Higgs search strategies at the LHC.

Abstract

The dominant production process for heavy charged Higgs bosons at the LHC is the associated production with heavy quarks. We have calculated the next-to-leading-order supersymmetric QCD corrections to charged-Higgs production through the parton processes $q\bar{q},gg \to tbH^{\pm}$ and present results for total cross sections and differential distributions. The QCD corrections reduce the renormalization and factorization scale dependence and thus stabilize the theoretical predictions. We present a comparison of the next-to-leading-order results for the inclusive cross section with a calculation based on bottom--gluon fusion $gb \to tH^{\pm}$ and discuss the impact of the next-to-leading-order corrections on charged-Higgs searches at the LHC.