# $B$-meson charged current anomalies: The post-Moriond 2019 status

Bardhan, Debjyoti (Department of Physics, Ben-Gurion University, Beer-Sheva 8410501, Israel) ; Ghosh, Diptimoy (Department of Physics, Indian Institute of Science Education and Research, Pune 411008, India)

10 July 2019

Abstract: In this paper, we discuss the impact of the recent Belle result on the various theoretical explanations of the ${R}_{D}$ and ${R}_{{D}^{*}}$ anomalies. The pure tensor explanation, which was strongly disfavored by the measurements of ${F}_{L}^{{D}^{*}}$ and high-${p}_{T}$ $pp\to \tau \nu$ searches before Moriond, is now completely allowed because of the reduction of the experimental world average. Moreover, the pure right-chiral vector solution (involving right-chiral neutrinos) has now moved into the $2\sigma$ allowed range of the LHC $pp\to \tau \nu$ searches. We also critically reexamine the bound on $B\left({B}_{c}^{-}\to {\tau }^{-}{\overline{\nu }}_{\tau }\right)$ from large electron-positron collider data and show that the bound is considerably weaker than the number 10% often used in the recent literature.

Published in: Physical Review D 100 (2019)