Relaxing b\to sγConstraints on the Supersymmetric Particle Mass Spectrum

Details Relaxing b\to sγConstraints on the Supersymmetric Particle Mass Spectrum Relaxing b\to sγConstraints on the Supersymmetric Particle Mass Spectrum

2000-06-21

arxiv.org/abs/hep-ph/0006253v2

Phys.Lett. B491 (2000) 297-304

Physics

High Energy Physics

High Energy Physics - Phenomenology

references added, version to be published in PLB

Scientific paper

10.1016/S0370-2693(00)01033-9

We consider the radiative decay b \to s \gamma in a supersymmetric extension of the standard model of particle interactions, where the $b$-quark mass is entirely radiative in origin. This is accomplished by the presence of nonholomorphic soft supersymmetry breaking terms in the Lagrangian. As a result, the contributions to the b \to s \gamma amplitude from the charged Higgs boson and the charginos/neutralinos are suppressed by 1/\tan^2\beta and {\cal O}(\alpha/\alpha_s) respectively, allowing these particles to be lighter than in the usual supersymmetric model. Their radiatively generated couplings differ from the usual tree-level ones and change the collider phenomenology drastically. We also study how this scenario may be embedded into a larger framework, such as supersymmetric SU(5) grand unification.

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