PoS - Proceedings of Science
Volume 340 - The 39th International Conference on High Energy Physics (ICHEP2018) - Plenary
Flavor theory & outlook
S. Fajfer
Full text: pdf
Published on: August 02, 2019
Disagreements between experimental results and Standard Model theoretical predictions found in B meson decays, initiated many theoretical studies in flavour physics. The anomalous behaviour observed in B meson decays are known as $R_{D^{(∗)}}$ and $R_{K^{(∗)}}$ puzzles. The first one refers to the deviations in the decays in the ratio of the decay widths for $B \rightarrow D^{(∗)}τν$ and $B\rightarrow D^{(∗)}μν$, while the second one is related to the ratio of the decay widths for $B\rightarrow K^{(∗)}$$μ^+μ^−$ and $B\rightarrow K^{(∗)}$$e^+e^−$ transition. In addition, the measured muon anomalous magnetic moment differs from the SM pre- dictions. I briefly review main results coming from the SM studies and the effective Lagrangian approach containing New Physics for $R_{D^{(∗)}}$ and $R_{K^{(∗)}}$.Then I discuss basic features of leptoquark models which can resolve both B meson anomalies. If New Physics is confirmed in B decays a number of processes at low and high energies should confirm its presence.
DOI: https://doi.org/10.22323/1.340.0715
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