tan(beta) in B physics - but which tan(beta)?

by Dr Sebastian Jager

Thursday 26 Feb 2009, 11:00 → 12:00 Europe/Zurich

1/1-025 (CERN)

If the parameter tan(beta) is large, the SUSY contributions to some flavour-changing processes, specifically Bs-Bs(bar) mixing and B_s->mu mu, can be dominated by heavy-neutral-Higgs-boson exchange. For minimal flavour violation, a strong correlation between the two has also been observed in the literature. The leptonic decay, proportional tan(beta)^6, might be useful for determining tan(beta) at the LHC. In this context, one needs to know how to relate it to various tan(beta) renormalization schemes used in Higgs physics, some of which are known to differ by numerically large shifts. I describe the general structure of higher-order corrections and to what extent they can be enhanced by powers of tan(beta). Specifically, the only new tan(beta)-enhanced terms arise from loop corrections to the Higgs sector. These can also give rise to parametrically large shifts between tan(beta) renormalization schemes. I argue that tan(beta) extracted from B physics is approximately tan(beta)^DR-bar. The fate of the MFV correlation is also discussed.