CP asymmetry for radiative B-meson decay in the supersymmetric standard model

Details CP asymmetry for radiative B-meson decay in the supersymmetric standard model CP asymmetry for radiative B-meson decay in the supersymmetric standard model

1999-03-17

arxiv.org/abs/hep-ph/9903385v1

Nucl.Phys. B554 (1999) 50-66

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, Latex, 9 figures

Scientific paper

10.1016/S0550-3213(99)00305-3

We study a rate asymmetry in the inclusive decay $\Bsgamma$, assuming the supersymmetric standard model based on N=1 supergravity. A complex coefficient $A$ for scalar-trilinear couplings is the source of CP violation, which is contained in the mass-squared matrices for squarks. The model parameters are nontrivially constrained by experimental results for the branching ratio of the radiative decay and for the electric dipole moments of the neutron and the electron. The decay rate asymmetry is predicted to be much larger than that by the standard model in a wide region of the parameter space compatible with the experiments. Its magnitude can be maximally around 0.1, which will be well accessible at B factories.

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