Combined study of b{yields}s{gamma} and the muon anomalous magnetic moment in gauge-mediated supersymmetry breaking models

Journal Article · Sat Jul 01 04:00:00 EDT 2000 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.62.015012· OSTI ID:20216979

Mahanthappa, K T ^[1]; Oh, Sechul ^[1]

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1. Department of Physics, University of Colorado, Boulder, Colorado 80309 (United States)

We study both the branching ratio for b{yields}s{gamma} decay and the muon anomalous magnetic moment, a{sub {mu}}{identical_to}(g-2){sub {mu}}/2, in the minimal supersymmetric standard model with gauge-mediated supersymmetry breaking. Combining new experimental data on a{sub {mu}} and the branching ratio for b{yields}s{gamma}, strong limits on the parameter space of these models are derived. We find that this combined study leads to much stronger constraints on the parameter space of the model than those from either b{yields}s{gamma} or a{sub {mu}}. In particular, the region of large tan {beta} is extremely limited, which would have been otherwise allowed. We include the supersymmetric one-loop correction to the mass of b quark, m{sub b}, and find that in order to have a correct value of m{sub b}, the region of large tan {beta} and {mu}<0 (in our convention) is not allowed in these models. The region of large tan {beta} and {mu}>0 is also strongly constrained. We present bounds on supersymmetric particle masses as a function of tan {beta}. (c) 2000 The American Physical Society.

• OSTI ID: 20216979
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 62; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
BRANCHING RATIO
MAGNETIC MOMENTS
MUONS
RADIATIVE DECAY
S QUARKS
SPARTICLES
SUPERSYMMETRY
THEORETICAL DATA