B decay anomalies in an effective theory

Abstract

We investigate how far a new physics scenario affecting primarily the third generation fermions can ameliorate the tension between B-decay observables and Standard Model expectations. Adopting a model-independent approach, we find that among the three observables that show signs of such a tension, viz. the branching fractions for $B^{+}\to \tau \nu$, $B_d\to D(D^{\ast })\tau \nu$, and the like-sign dimuon anomaly in neutral B decays, the first two can be explained adequately, while there is only a marginal improvement for the third. As a spin-off, it is shown that one can also accommodate a change in the branching fraction of the Higgs boson to a $\tau$ lepton pair from the SM expectation, if such a change is established in future data.

Almost identical with version 2, version published in Phys. Rev. D

References in corpus (26)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Evidence for an excess of B -> D(*) Tau Nu decays
• On the B to D* tau nu Sensitivity to New Physics
• Implications of lepton flavor universality violations in B decays
• Explaining B->Dτν, B->D*τνand B->τνin a 2HDM of type III
• Evidence for an anomalous like-sign dimuon charge asymmetry
• Predictions of selected flavour observables within the Standard Model
• Combined search for the Standard Model Higgs boson in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Evidence for an anomalous like-sign dimuon charge asymmetry
• The Two Higgs Doublet of Type II facing flavour physics data
• Diagnosing New Physics in $b\to c\tau {\nu }_{\tau }$ decays in the light of the recent BaBar result
• Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb^-1 of p pbar collisions
• Charged-Higgs effects in a new B -> D tau nu differential decay distribution
• Observation of B+ -> Dbar*0 tau+ nu_tau and Evidence for B+ -> Dbar^0 tau+ nu_tau at Belle
• Tau longitudinal polarization in B -> D tau nu and its role in the search for charged Higgs boson
• Determination of the sign of the decay width difference in the B_s system
• An improved determination of the width of the top quark
• Enhanced $B_s$--${\bar{B}}_s$ lifetime difference and anomalous like-sign dimuon charge asymmetry from new physics in $B_s\to {\tau }^{+}{\tau }^{-}$
• Comment on new physics contributions to Gamma_{12}^s
• Leptonic universality breaking in Upsilon decays as a probe of new physics
• Possibility of large lifetime differences in neutral B meson systems
• Long-Distance Contribution to ΔΓs/Γs of the $B_s-{\bar{B}}_s$ System
• How large can the branching ratio of $B_s\to {\tau }^{+}{\tau }^{-}$ be ?
• Reconciling anomalous measurements in $B_s-{\bar{B}}_s$ mixing: the role of CPT-conserving and CPT-violating new physics
• B -> tau nu: Opening up the Charged Higgs Parameter Space with R-parity Violation

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• ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ Decay in the Standard Model and with New Physics
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• Effective theory approach to new physics in $b\to u$ and $b\to c$ leptonic and semileptonic decays
• Constraints on the charged scalar effects using the forward-backward asymmetry on $B\to D^{(\ast )}\tau \overline{{\nu }_{\tau }}$
• Semileptonic decays $B\to D^{(\ast )}l\nu$ in the perturbative QCD factorization approach
• Probing the R-parity violating supersymmetric effects in the exclusive b\to c\ell^-\barν_\ell decays
• Study of ${\bar{B}}_s^0\to (D_s^{+},D_s^{\ast +})l^{-}{\bar{\nu }}_l$ decays in the pQCD factorization approach
• The $B\to D^{(\ast )}l{\nu }_l$ decays in the pQCD approach with the Lattice QCD input
• $R_{K^{(\ast )}}$ and $R(D^{(\ast )})$ anomalies resolved with lepton mixing
• Unified resolution of the $R(D)$ and $R(D^{\ast })$ anomalies and the lepton flavor violating decay $h\to \mu \tau$
• $R_{K^{(\ast )}}$ from RPV-SUSY sneutrinos
• Z-pole observables in an effective theory
• Corrections to $R_D$ and $R_{D^{\ast }}$ in the BLMSSM
• Lepton Universality Violation by Kaluza-Klein Neutrinos in $b\to sll$ transition
• Semileptonic $B\to \bar{D}$ transition in nuclear medium