# CP Violation in ${\bar B}^0 \to D^{*+} \ell^- {\bar\nu}_\ell$

## TL;DR

This paper explores how measuring CP violation in ${ar B}^0 o D^{*+} \, ext{lepton}^- \, {ar
u}_ ext{lepton}$ decays can help identify new physics beyond the standard model, addressing existing experimental discrepancies.

## Contribution

It proposes using CP-violating observables in ${ar B}^0$ decays to distinguish between different new physics models.

## Key findings

- CP-violating observables can differentiate NP scenarios
- Measurement strategies for CP violation are outlined
- Potential to resolve standard model discrepancies

## Abstract

At present, there are discrepancies with the predictions of the standard model in ${\bar B}^0 \to D^{*+} \ell^- {\bar\nu}_\ell$ decays, hinting at the presence of new physics (NP) in $b \to c \tau^- {\bar\nu}$. Various NP models have been proposed to explain the data. In this talk, I discuss how the measurement of CP-violating observables in ${\bar B}^0 \to D^{*+} \ell^- {\bar\nu}_\ell$ can be used to differentiate the NP scenarios.