Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-04-18
Phys.Lett. B512 (2001) 107-114
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 4 figures, added discussion on neutralino-nucleon cross section, minor changes
Scientific paper
10.1016/S0370-2693(01)00662-1
We analyze the supersymmetric contributions to the anomalous magnetic moment of the muon (a_\mu) in the framework of pure and gaugino-assisted anomaly mediation models, and gaugino mediation models. In the last two models the gauge multiplets propagate in the higher dimensional bulk, providing a natural mechanism for solving the problem of negative squared slepton masses present in the pure anomaly mediation models. In the light of the new BNL results for a_\mu, we found that the pure and gaugino-assisted anomaly mediation models are almost excluded by the BNL constraints at 2\sigma level when combined with CLEO constraints on b->sg at 90 % of C.L. In contrast, the gaugino mediation models provide extensive regions in the SUSY parameter space where both of these constraints are satisfied.
Enqvist Kari
Gabrielli Emidio
Huitu Katri
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