$\tau$ polarization asymmetries in $B^+ \to \tau^+\nu_{\tau}\gamma$ and $B^+_c \to \tau^+\nu_{\tau}\gamma$

TL;DR

This paper investigates tau lepton polarization asymmetries in radiative B meson decays to explore potential CP violation effects beyond the Standard Model, focusing on transverse polarization components as indicators of T violation.

Contribution

It introduces a detailed analysis of tau polarization asymmetries in specific B meson decays, emphasizing the transverse component as a probe for new physics beyond the Standard Model.

Findings

Transverse tau polarization asymmetries can signal CP violation beyond the Standard Model.

The study provides theoretical predictions for polarization asymmetries in B decay modes.

Potential T-violating effects are identified as measurable in future experiments.

Abstract

We study the lepton polarization asymmetries in the radiative leptonic B decays of $B^+\to l^+\nu_{l}\gamma$ and $B^+_{c}\to l^+\nu_{l}\gamma$. We concentrate on the transverse component of the $\tau$ lepton asymmetries in the tau decay modes due to CP violation in theories beyond the standard model to search T violating effect.