Flavor changing Z decay $Z\to b\bar{s}(\bar{b}s)$ in topcolor-assisted technicolor models

Details Flavor changing Z decay $Z\to b\bar{s}(\bar{b}s)$ in topcolor-assisted technicolor models Flavor changing Z decay $Z\to b\bar{s}(\bar{b}s)$ in topcolor-assisted technicolor models

2002-11-08

arxiv.org/abs/hep-ph/0211116v4

Nucl.Phys. B650 (2003) 290-300

Physics

High Energy Physics

High Energy Physics - Phenomenology

Final version to appear in Nucl. Phys. B. References added

Scientific paper

10.1016/S0550-3213(02)01015-5

In the context of topcolor-assisted technicolor (TC2) models, we examine the flavor changing (FC) Z decay $Z\to b\bar{s}(\bar{b}s)$ and calculate the contributions of the new particles predicted by TC2 models to the branching ratio Br($Z\to b\bar{s}+\bar{b}s$). We find that the contributions mainly come from the top-pions. In most of the parameter space, the Br($Z\to b\bar{s}+\bar{b}s$) can reach $10^{-5}$, which may be detected in near future experiments such as Giga-Z version of the TESLA. Thus, the FC Z decay $Z\to b\bar{s}(\bar{b}s)$ can be used to test TC2 models.

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