分类: 物理学 >> 基本粒子与场物理学 提交时间: 2016-05-16
摘要: The O(alpha m(t)(2)/m(w)(2)) Yukawa corrections to top quark pair production in photon-photon collisions ate calculated in the standard model (SM), the general two-Higgs-doublet model (2HDM), as well as the minimal supersymmetric model (MSSM). We found that the correction to the cross section can only reach a few percent in the SM, but can be quite significant (> 10%) in the 2HDM and MSSM for favorable parameter values, which may be observable at high energy e(+)e(-) colliders.