b → sγ and [formula omitted] in technicolor with scalars

We consider the radiative decay b → sγ, and the correction to the Zb b vertex in technicolor models with scalars. In these models, the scalar develops a vacuum expectation value when the technifermions condense, and the ordinary fermions develop masses via Yukawa couplings. Since the symmetry breaki...

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Published inPhysics letters. B Vol. 344; no. 1; pp. 287 - 292
Main Authors Carone, Christopher D., Simmons, Elizabeth H., Su, Yumian
Format Journal Article
LanguageEnglish
Published Elsevier B.V 1995
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Summary:We consider the radiative decay b → sγ, and the correction to the Zb b vertex in technicolor models with scalars. In these models, the scalar develops a vacuum expectation value when the technifermions condense, and the ordinary fermions develop masses via Yukawa couplings. Since the symmetry breaking sector involves both a fundamental scalar doublet and an isotriplet of composite scalars (the technipions), the phenomenology associated with the charged scalars is similar to that found in a type-I two-Higgs doublet model. We show that the correction to the Zb b vertex is small over the allowed parameter space of the model in the two limits that we consider, and that there can be large, potentially observable, contributions to the b → sγ branching fraction.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(94)01495-X