Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Flavour Physics and CP Violation
Precision predictions for $B \rightarrow \rho \tau \nu_\tau$ and $B \rightarrow \omega \tau \nu_\tau$ in the SM and beyond
M. Prim,* F.U. Bernlochner, D. J. Robinson
*corresponding author
Full text: pdf
Pre-published on: June 16, 2020
Published on:
Abstract
We present new precision predictions for semitauonic decays involving $\rho$ and $\omega$ final state mesons. These decay channels offer an interesting orthogonal probe to study the existing B anomalies in semitauonic transitions and are accessible with the Belle II experiment. The predictions are based on combining existing light-cone sum-rule calculations for the form factors with measured experimental spectra from the BaBar and Belle collaborations. This allows us to reliably extrapolate the light-lepton form factor predictions to large values of the four-momentum transfer squared, $q^2$, and in turn to derive precise predictions for $R_\rho$ and $R_\omega$, the ratio of the total decay rates of $B \rightarrow \rho \tau \nu_\tau$ and $B \rightarrow \omega \tau \nu_\tau$ for $\tau$ final states with respect to light leptons in the SM. In addition, we investigate the impact of all four-fermi operators on the semitauonic $q^2$ spectra and these ratios.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access