Effect of H^\pm on B^\pm\to τ^\pmν_τand D^\pm_s\to μ^\pmν_μ,τ^\pmν_τ

Abstract

The recent observation of the purely leptonic decay B^\pm\to τ^\pmν_τat the B factories permits a sizeable contribution from a charged Higgs boson (H^\pm). Such a H^\pm would also contribute to the decays D^\pm_s\to μ^\pmν_μand D^\pm_s\to τ^\pmν_τ, which are being measured with increasing precision at CLEO-c. We show that the branching ratios of D^\pm_s\to μ^\pmν_μand D^\pm_s\to τ^\pmν_τcould be suppressed by up to 10% from the Standard Model prediction, which is larger than the anticipated precision in the measurements of these decays at forthcoming BES-III.

9 pages, 4 figures, reference added, minor alterations, version to appear in Phys.Rev.D

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• Interpretation of the "$f_{D_s}$ puzzle" in SM and beyond
• Measurement of the $D_s^{+}\to {\ell }^{+}{\nu }_{\ell }$ branching fractions and the decay constant $f_{D_s^{+}}$
• Neutral Higgs boson pair production in photon-photon annihilation in the Two Higgs Doublet Model
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• R-parity violating supersymmetry, B_s mixing, and D_s -> l nu
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• Two-Higgs-Doublet Type-II Seesaw Model
• Leptonic decays of D_s and B^+ mesons in supersymmetric standard model with R-parity violating interactions
• A possible signature of new physics at BES-III