B->tau nu in multi-Higgs models with MFV

Details B->tau nu in multi-Higgs models with MFV B->tau nu in multi-Higgs models with MFV

2011-07-06

arxiv.org/abs/1107.1216v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, latex, 4 figs

Scientific paper

We analyse the $B \rightarrow \tau \nu$ decay in a generic two-Higgs doublet model satisfying the MFV hypothesis. In particular, we analyse under which conditions $\BR(B \rightarrow \tau \nu)$ can be substantially enhanced over its SM value, taking into account the constraints of $K \rightarrow \mu\nu$, $B \rightarrow X_s \gamma$, and $B_s \rightarrow \mu^+ \mu^-$. We find that for large $\tan\beta$ values and Peccei-Quinn symmetry breaking terms of $\cO(1/\tan\beta)$ a sizable ($\sim 50%$) enhancement of $\BR(B \rightarrow \tau \nu)$ is possible, even for $m_H \sim 1$ TeV.

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