QCD corrections to associated Higgs boson production with aWboson pair at LHC

Abstract

The Higgs boson production in association with a pair of W bosons at the Large Hadron Collider (LHC) can be used to probe the coupling between the Higgs boson and vector gauge bosons and discover the signature of new physics. We describe the impact of the complete QCD next-to-leading order (NLO) radiative corrections and the gluon-gluon fusion subprocesses to the cross section of this process at the LHC and investigate the dependence of the leading order (LO) and QCD corrected cross sections on the factorization/renormalization energy scale and Higgs boson mass. We present the LO and QCD corrected distributions of the invariant mass of a W boson pair and the transverse momenta of the final W and Higgs boson. We find that the QCD NLO corrections and the contribution from a gluon-gluon fusion subprocess significantly modify the LO distributions, and the scale dependence of the QCD corrected cross section is badly underestimated by the LO results. Our numerical results show that the K-factor of the QCD correction varies from 1.48 to 1.64 when m{sub H} goes up from 100 GeV to 160 GeV. We find also the QCD correction from the gg{yields}H{sup 0}W{sup +}W{sup -} subprocess at the LHC is more » significant and should be considered in precise experiment. « less