Yukawa corrections to the bottom pair production in photon-photon collisions

The O(alpha m(t)(2)/m(w)(2)) Yukawa corrections to bottom quark pair production via photon-photon fusion in TeV e(+)e(-) colliders are calculated in both the general two-Higgs-doublet model and minimal supersymmetric model. We find that the corrections to the cross section of the subprocess gamma gamma-->b (b) over bar be a few percent. The corrections to the total cross section of the process e(+)e(-)-->gamma gamma-->b (b) over bar in the beamstrahlung photon fusion mode are rather small and can be ignored at the one-loop level; however, the corrections in the Compton backscattering photon fusion mode may approach 0.1% for favorable parameter values.Astronomy & AstrophysicsPhysics, Particles & FieldsSCI(E)0ARTICLE32363-23735