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

Abstract

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

5 pages, latex, 4 figs. Discussion of B->Xs gamma bound and corresponding numerical analysis significantly improved. Main conclusions unchanged

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Cited by in corpus (4)

• Towards the Identification of New Physics through Quark Flavour Violating Processes
• Minimal Flavour Violation and Beyond
• Can the new resonance at LHC be a CP-Odd Higgs boson?
• B -> tau nu: Opening up the Charged Higgs Parameter Space with R-parity Violation