New physics and the tau polarization vector in b → cτ −ν¯τ decays
DOI:
https://doi.org/10.31349/SuplRevMexFis.3.0308058Keywords:
Beyond the Standard Model, CP violation, Lepton Flavour UniversalityAbstract
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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Copyright (c) 2022 Neus Penalva, Juan Nieves, Eliecer Hernández (Author)
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