New physics and the tau polarization vector in b → cτ −ν¯τ decays

Authors

  • Neus Penalva IFIC (CSIC-UV)
  • Juan Nieves IFIC (CSIC-UV)
  • Eliecer Hernández U.Salamanca

DOI:

https://doi.org/10.31349/SuplRevMexFis.3.0308058

Keywords:

Beyond the Standard Model, CP violation, Lepton Flavour Universality

Abstract

For a general H_b→H_c τ ν_τ decay, we analyze the role of theτpolarization vector P^μ in the context of lepton flavor universality violation studies. We use a general phenomenological approach that includes several new physics terms and we make specific evaluations of P^μ fordifferent decays. We show that a P^μ component orthogonal to the plane determined by the final hadron and τ three-momenta is only possiblefor complex Wilson coefficients and it would be associated to a violation of the CP symmetry.

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Published

2022-06-13

How to Cite

1.
Penalva N, Nieves J, Hernández E. New physics and the tau polarization vector in b → cτ −ν¯τ decays. Supl. Rev. Mex. Fis. [Internet]. 2022 Jun. 13 [cited 2022 Dec. 9];3(3):0308058 1-5. Available from: https://rmf.smf.mx/ojs/index.php/rmf-s/article/view/6236