New physics and the tau polarization vector in $b\to c\tau {\bar{\nu }}_{\tau }$ decays

N. Penalva, E. Hernández, J. Nieves

For a general $H_b\to H_c\tau {\bar{\nu }}_{\tau }$ decay we analyze the role of the $\tau$ polarization vector ${\mathcal{P}}^{\mu }$ in the context of lepton flavor universality violation studies. We use a ge…