Complete next-to-leading order QCD corrections to charged Higgs boson associated production with a top quark at the CERN Large Hadron Collider

Abstract

The complete next-to-leading order (NLO) QCD corrections to charged Higgs boson associated production with a top quark through $b\stackrel{\ensuremath{\rightarrow}}{g}{\mathrm{tH}}^{\ensuremath{-}}$ at the CERN Large Hadron Collider are calculated in the minimal supersymmetric standard model and two-Higgs-doublet model in the $\overline{\mathrm{MS}}$ scheme. The NLO QCD corrections can reduce the scale dependence of the leading order (LO) cross section. The K factor (defined as the ratio of the NLO cross section to the LO one) does not depend on $\mathrm{tan}\ensuremath{\beta}$ if the same quark running masses are used in the NLO and LO cross sections, and varies roughly from \ensuremath{\sim}1.6 to \ensuremath{\sim}1.8 when charged Higgs boson mass increases from 200 to 1000 GeV.