Constraints on supersymmetric grand unification from [ital b][r arrow][ital s][gamma] decay

Journal Article · Wed Mar 01 04:00:00 EST 1995 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.51.2438· OSTI ID:6580147

Barger, V; Berger, M S; Ohmann, P ^[1]; Phillips, R J.N. ^[2]

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1. Physics Department, University of Wisconsin, Madison, Wisconsin 53706 (United States)
2. Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX (United Kingdom)

The top-quark Yukawa infrared fixed-point solution of the renormalization group equations, with minimal supersymmetry and grand 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 [ital b][r arrow][ital s][gamma] branching fraction and investigate the impact of nonuniversal scalar mass boundary conditions. We find our results do not depend significantly on the value of the GUT-scale trilinear coupling [ital A][sup [ital G]]. The small tan[beta] region favors predictions for the inclusive [ital b][r arrow][ital 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.

• DOE Contract Number: AC02-76ER00881
• OSTI ID: 6580147
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 51:5; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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