The $b\to sγ$ decay in SUSY models with non-universal A-terms

Details The $b\to sγ$ decay in SUSY models with non-universal A-terms The $b\to sγ$ decay in SUSY models with non-universal A-terms

2000-05-30

arxiv.org/abs/hep-ph/0005303v1

Nucl.Phys. B594 (2001) 3-22

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 latex pages, with 6 figures in 11 eps files

Scientific paper

10.1016/S0550-3213(00)00597-6

We analyse the predictions for the inclusive branching ratio for $b\to s\gamma$ decay in a class of string-inspired SUSY models with non-universal soft-breaking A-terms. These models are particularly interesting since the non-universality of the A-terms plays an important role in providing new significant contributions to CP violation effects in kaon physics while respecting the severe bounds on electric dipole moments. We show that $b\to s\gamma$ do not severely constrain the non-universality of these models. In particular, at low $\tan\beta$ $(\tan\beta\simeq 2)$, our predictions are close to the universal case. For large $\tan\beta$ ($\tan\beta \gsim 15$),the effect of non-universality is enhanced and stronger constraints hold. We find that the parameter regions which are important for generating sizeable contribution to $\epsilon'/\epsilon$, of order $2 \times 10^{-3}$, are not excluded.

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