Semitauonic B Decay Anomaly

Abstract

The anomalously large experimentally measured ratios of the semitauonic decay $B\to D^{(\ast )}+\tau +\nu$ and the corresponding semileptonic $B\to D^{\ast }+ł+{\bar{\nu }}_l$ disagree with the predictions of the standard E.W + QCD model(S.M). We briefly comment on this disagreement and on possible new physics explanations which are rather constrained and difficult to implement.

Version published in PRD

References in corpus (3)

• 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
• Flavor models for $\bar{B}\to D^{(\ast )}\tau \bar{\nu }$
• Collider Signals of Top Quark Flavor Violation from a Warped Extra Dimension

Cited by in corpus (1)

• New Physics in the Visible Final States of $B\to D^{(\ast )}\tau \nu$