O(αs) QCD and O(αew) electroweak corrections to tt-h0 production in γγ collision

We calculate the O(αs) QCD and O(αew) electroweak one-loop corrections in the Standard Model framework, to the production of an intermediate Higgs boson associated with tt-pair via γγ fusion at an electron-positron linear collider (LC). We find the O(αs) QCD corrections can be larger than the O(αew) electroweak ones, with the variations of the Higgs boson mass mh 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→tt-h0 may reach 34.8%, when √s=800 GeV and mh=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