Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-09-18
Phys.Rev.D78:035007,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, 6 figures, version appeared in PRD
Scientific paper
10.1103/PhysRevD.78.035007
We study the Yukawa corrections to the gamma gamma --> b\bar{b} corss section in the topcolor assisted technicolor models at the photon-photon colliders. We find that, for the favorable parameters, the relative corrections from pseudo Goldstone bosons give out a 3.2%--5.9% decrement of the cross section from the tree level when \sqrt{s}=500 GeV, the contributions from new extended technicolor gauge bosons Z* and colored gauge bosons B are negligibly small, and the relative correction arising from new color-singlet heavy gauge boson Z' is less than -3.2%. Therefore, the total relative corrections are significantly larger than the corresponding corrections in the standard model, the general two Higgs doublet model and the minimal supersymmetric standard model. Since these corrections are obvious for the International Linear Colliders, the process gamma gamma --> b\bar{b} is really interesting in testing the standard model and searching for the signs of technicolor.
Huang Jin-Shu
Lu Gong-Ru
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