${\cal O}(α_{s})$ QCD and ${\cal O}(α_{ew})$ electroweak corrections to $t\bar{t}h^0$ production in $γγ$ collision

Chen Hui; Ma Wen-Gan; Zhang Ren-You; Zhou Pei-Jun; Hou Hong-Sheng; Sun Yan-Bin

doi:10.1016/j.nuclphysb.2004.01.035

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arXiv · hep-ph/0309106

${\cal O}(α_{s})$ QCD and ${\cal O}(α_{ew})$ electroweak corrections to $t\bar{t}h^0$ production in $γγ$ collision

Chen Hui·Ma Wen-Gan·Zhang Ren-You·Zhou Pei-Jun·Hou Hong-Sheng·Sun Yan-Bin

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Abstract

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

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Chen Hui, Ma Wen-Gan, Zhang Ren-You, Zhou Pei-Jun, Hou Hong-Sheng, Sun Yan-Bin. 2004-01-24. ${\cal O}(α_{s})$ QCD and ${\cal O}(α_{ew})$ electroweak corrections to $t\bar{t}h^0$ production in $γγ$ collision. https://doi.org/10.1016/j.nuclphysb.2004.01.035

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