Yukawa Corrections to gamma gamma --> b\bar{b} in the Topcolor Assisted Technicolor Models

TL;DR

This paper investigates Yukawa corrections in gamma gamma --> bar{b} processes within topcolor assisted technicolor models, revealing significant deviations from the Standard Model that could be tested at future colliders.

Contribution

It provides the first detailed analysis of Yukawa correction effects in this process specifically within topcolor assisted technicolor models, highlighting their potential observability.

Findings

Yukawa corrections cause a 3.2%–5.9% decrease in cross section at 500 GeV.

Contributions from Z* and B gauge bosons are negligible.

Z' boson contributes less than -3.2% correction.

Abstract

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.