Formula omitted] QCD and [formula omitted] electroweak corrections to [formula omitted] production in γγ collision

Abstract

We calculate the O(α s) QCD and O(α ew ) electroweak one-loop corrections in the Standard Model framework, to the production of an intermediate Higgs boson associated with t t ̄ pair via γγ fusion at an electron–positron linear collider (LC). We find the O(α s) QCD corrections can be larger than the O(α ew ) electroweak ones, with the variations of the Higgs boson mass m h and e + e − colliding energy s . Both corrections may significantly decrease or increase the Born cross section. The numerical results show that the relative corrections from QCD to the process e +e −→γγ→t t ̄ h 0 may reach 34.8%, when s =800 GeV and m h =200 GeV, while those from electroweak can be −13.1, −15.8 and −12.0%, at s =800 GeV, 1 TeV and 2 TeV, respectively.