Tauonic B decays in the Minimal Supersymmetric Standard Model

Abstract

We study new physics effects on B decay processes including a final $\tau$ particle, namely $B\to D\tau \nu$ and $B\to \tau \nu$. An important feature of these processes is that a charged Higgs boson can contribute to the decay amplitude at the tree level in models such as Two Higgs Doublet Model and the Minimal Supersymmetric Standard Model (MSSM). We derive a resummed effective Lagrangian for charged-Higgs mediated interactions in the MSSM with the Minimal Flavor Violation. Including supersymmetric (SUSY) loop corrections for down-type-quark and charged-lepton Yukawa couplings, we calculate the branching ratios of the $B\to D\tau \nu$ and $B\to \tau \nu$ processes. We find that SUSY correction due to gluino-sbottom diagrams can change the Higgs exchange contribution by $\pm 50$%, whereas stau-neutralino diagrams can make corrections up to 20%. We also discuss relationship between SUSY corrections in the tauonic decays and flavor changing neutral current processes such as $B_s\to {\mu }^{+}{\mu }^{-}$ and $b\to s\gamma$.

29 pages, 22 figures

References in corpus (3)

• Physics at Super B Factory
• Bounding the MSSM Higgs sector from above with the Tevatron's B_s --> mu^+ mu^-
• Search for B -> tau nu at Belle

Cited by in corpus (31)

• Evidence for an excess of B -> D(*) Tau Nu decays
• Measurement of an Excess of B -> D(*) Tau Nu Decays and Implications for Charged Higgs Bosons
• Measurement of the branching ratio of $\bar{B}\to D^{(\ast )}{\tau }^{-}{\bar{\nu }}_{\tau }$ relative to $\bar{B}\to D^{(\ast )}{\ell }^{-}{\bar{\nu }}_{\ell }$ decays with hadronic tagging at Belle
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$
• The Physics of the B Factories
• Measurement of the branching ratio of ${\bar{B}}^0\to D^{\ast +}{\tau }^{-}{\bar{\nu }}_{\tau }$ relative to ${\bar{B}}^0\to D^{\ast +}{\ell }^{-}{\bar{\nu }}_{\ell }$ decays with a semileptonic tagging method
• New physics in the weak interaction of $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Measurement of the $\tau$ lepton polarization and $R(D^{\ast })$ in the decay $\bar{B}\to D^{\ast }{\tau }^{-}{\bar{\nu }}_{\tau }$ with one-prong hadronic $\tau$ decays at Belle
• $R(D^{(\ast )})$ in a general two Higgs doublet model
• B -> D tau nu Branching Ratios: Opportunity for Lattice QCD and Hadron Colliders
• Observation of B^0 \to D^{*-} τ^+ ν_τ decay at Belle
• Charged-Higgs effects in a new B -> D tau nu differential decay distribution
• Tau longitudinal polarization in B -> D tau nu and its role in the search for charged Higgs boson
• An Improved Standard Model Prediction Of BR(B -> tau nu) And Its Implications For New Physics
• Observation of the Semileptonic Decays B --> D* tau nubar and Evidence for B --> D tau nubar
• B-Meson Observables in the Maximally CP-Violating MSSM with Minimal Flavour Violation
• The supersymmetric Higgs sector and B-Bbar mixing for large tan beta
• Constraints on charged Higgs bosons from D(s)+- -> mu+- nu and D(s)+- -> tau+- nu
• Effect of H^\pm on B^\pm\to τ^\pmν_τand D^\pm_s\to μ^\pmν_μ,τ^\pmν_τ
• Exploring top quark FCNC within 2HDM type III in association with flavor physics
• The decay Bs -> mu+ mu-: updated SUSY constraints and prospects
• Measurement of the Semileptonic Decays B --> D tau- nubar_tau and B --> D* tau- nubar_tau
• Measuring V_ub and probing SUSY with double ratios of purely leptonic decays of B and D mesons
• Supersymmetry beyond minimal flavour violation
• Measuring B -> tau nu and B_c -> tau nu at the Z peak
• Charged Higgs bosons in the Next-to MSSM (NMSSM)
• Non-Standard Neutrino Interactions at One Loop
• Universality test of the charged Higgs boson couplings at the LHC and at B factories
• New physics from flavour
• Higgs hunting with B decays
• SUSY beyond minimal flavour violation