Implication of flavor anomalies on decay observables

Abstract

The experimental predictions of R D , , R J/ψ , and in B decays mediated via quark level transition deviate significantly from the standard model expectations. The current world average of the ratio of branching ratios R D and in (l ∈ e, τ) show 1.4σ and 2.5σ deviation from the SM expectations. Similarly, the τ polarization fraction and the longitudinal polarization fraction of the D* meson in are found to deviate from the standard model expectations at 1.6σ and 1.5σ level, respectively. In addition, the ratio of branching ratio R J/ψ in deviates from the standard model prediction at 1.7σ level. In this regard, we study the implication of R D , , R J/ψ , and anomalies on decay observables in a model independent effective field theory formalism. We give predictions of several physical observables in the standard model and in the presence of various 1D and 2D new physics scenarios.