Recent Anomalies in B Physics

Abstract

$B$ physics plays important roles in searching for the new physics (NP) beyond the standard model (SM). Recently, some deviations between experimental data and SM predictions were reported, namely $R(D^{(\ast )})$, $P_5^{\prime }$ and $R_{K^{(\ast )}}$ anomalies. If these anomalies were further confirmed in future, they would be unambiguous hints of NP. Theoretically, in order to explain these anomalies, a large number of models have been proposed, such as models including leptoquark or $Z^{\prime }$. However, these new particles have not been discovered directly in LHC. Moreover, the models should pass the examination of $B_s\to {\mu }^{+}{\mu }^{-}$ and $B_s^0-{\bar{B}}_s^0$ mixing. In future, the analysis of data taken during the ongoing Run 2 of the LHC and the forthcoming Belle-II will present new insight both into the observables of interest and into new strategies to control uncertainties. Theoretically, the existed models should be further tested; and more NP models are welcomed to explain these anomalies simultaneously without affecting other measurements consistent with SM.

Comments: 6 pages 2 figures. Invited short review for Science Bulletin