arXiv:1908.06244·v1·High Energy Physics — Phenomenology

Probing new physics in $B_{s} \to (K, K^{*}) τ ν$ and $B \to π τ ν$ decays

Abstract

Motivated by the anomalies present in $b \to u$ and $b \to c$ semileptonic decays, we study the corresponding $B_{s} \to (K, K^{*}) τ ν$ and $B \to π τ ν$ decays within an effective field theory formalism. Our analysis is based on a strict model dependent assumption, i.e., we assume that $b \to u$ and $b \to c$ transition decays exhibit similar new physics pattern. We give prediction of various observables such as the branching fraction, ratio of branching ratio, lepton side forward-backward asymmetry, longitudinal polarization fraction of the charged lepton and convexity parameter in the standard model and in the presence of vector type new physics couplings.

Comments: Prepared for the conference: 23rd DAE-BRNS High Energy Physics Symposium 2018 10-14 Dec 2018. Chennai, India

Probing new physics in Bs​→(K,K∗)τν and B→πτν decays

Abstract

Probing new physics in $B_{s} \to (K, K^{*}) τ ν$ and $B \to π τ ν$ decays