Bs,d--> mu+ mu- in technicolor model with scalars
Abstract
Rare decays Bs,d-->mu+ mu- are evaluated in technicolor model with scalars. Rb is revisited to constrain the model parameter space. It is found that restriction on f/f' arising from Rb which was not considered in previous studies requires f/f' no larger than 1.9 at 95% confidence level, implying no significantly enhancement for Br(Bs,d-->mu+μ-) from neutral scalars in the model. However, the branching ratio of Bs--> mu+ mu- can still be enhanced by a factor of 5 relative to the standard model prediction. With the value of f/f' about 1.9, an upgraded Tevatron with an integrated luminosity 20fb-1 will be sensitive to enhancement of Bs-->mu+ mu- in this model provided that neutral scalar mass msigma is below 580 GeV.
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