Constraints on SUSY-GUT unification from $b\to sγ$ decay

Details Constraints on SUSY-GUT unification from $b\to sγ$ decay Constraints on SUSY-GUT unification from $b\to sγ$ decay

1994-07-11

arxiv.org/abs/hep-ph/9407273v1

Phys.Rev.D51:2438-2443,1995

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages + 5 PS figures included (uuencoded), MAD/PH/842, RAL-94-046

Scientific paper

10.1103/PhysRevD.51.2438

The top-quark Yukawa infrared fixed-point solution of the renormalization group equations, with minimal supersymmetry and GUT unification, defines a low-energy spectrum of supersymmetric particle masses in terms of a few GUT-scale parameters assuming universal boundary conditions. We give predictions in this model for the inclusive $b\to s\gamma$ branching fraction and investigate the impact of non-universal scalar mass boundary conditions. We find our results do not depend significantly on the value of the GUT-scale trilinear coupling $A^G$. The small $\tan \beta $ region favors predictions for the inclusive $b\to s\gamma$ branching fraction close to that of the Standard Model value. Nevertheless forthcoming experimental results can eliminate some regions of the GUT parameter space.

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