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${\bar B} \to D^* \ell^- {\bar\nu}_\ell$ Decays: Angular Distributions and New Physics

High Energy Physics - Phenomenology 2022-01-19 v1
Authors: David London
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Abstract

At the present time, there are hints of new physics (NP) in several observables involving b→cℓ−νˉℓb \to c \ell^- {\bar\nu}_\ell decays. In this talk, I describe measurable angular distributions for Bˉ→D∗μ−νˉμ{\bar B} \to D^* \mu^- {\bar\nu}_\mu and Bˉ→D∗τ−(→π−ντ)νˉτ{\bar B} \to D^* \tau^- (\to \pi^- \nu_\tau) {\bar\nu}_\tau decays, including the most general NP contributions. These angular distributions contain enough information to pin down the Lorentz structure of the NP, which will help to identify it. They also have the ability to reveal the presence of non-SMEFT (non-decoupling) NP.

Keywords

rare decays tau lepton physics heavy meson decays

Cite

@article{arxiv.2201.05856,
  title  = {${\bar B} \to D^* \ell^- {\bar\nu}_\ell$ Decays: Angular Distributions and New Physics},
  author = {David London},
  journal= {arXiv preprint arXiv:2201.05856},
  year   = {2022}
}

Comments

7 pages, 3 figures. Talk given at the 11th International Workshop on the CKM Unitarity Triangle (CKM2021), 22-26 November 2021, The University of Melbourne, Australia

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