Abstract
We investigate the MSSM with very large tan β > 50, where the fermion masses are strongly affected by loop-induced couplings to the “wrong” Higgs, imposing perturbative Yukawa couplings and constraints from flavour physics. Performing a low-energy scan of the MSSM with flavour-blind soft terms, we find that the branching ratio of B + → τ + ν and the anomalous magnetic moment of the muon are the strongest constraints at very large tan β and identify the viable regions in parameter space. Furthermore we determine the scale at which the perturbativity of the Yukawa sector breaks down, depending on the low-energy MSSM parameters. Next, we analyse the very large tan β regime of General Gauge Mediation (GGM) with a low mediation scale. We investigate the requirements on the parameter space and discuss the implied flavour phenomenology. We point out that the possibility of a vanishing Bμ term at a mediation scale M = 100 TeV is challenged by the experimental data on B + → τ + ν and the anomalous magnetic moment of the muon.
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ArXiv ePrint: 1004.1993
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Altmannshofer, W., Straub, D.M. Viability of MSSM scenarios at very large tan β . J. High Energ. Phys. 2010, 78 (2010). https://doi.org/10.1007/JHEP09(2010)078
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DOI: https://doi.org/10.1007/JHEP09(2010)078