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Theory Status - Puzzles in B Meson Decays and LFU?
by Svjetlana Fajfer
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|Authors (as Contributors):||Svjetlana Fajfer|
|Date submitted:||2018-11-14 01:00|
|Submitted by:||Fajfer, Svjetlana|
|Submitted to:||SciPost Physics Proceedings|
|Proceedings issue:||The 15th International Workshop on Tau Lepton Physics (Amsterdam, 2018-09)|
Currently B meson puzzles motivate many studies of New Physics due to the observed deviations from the Standard Model predictions. There are two B meson puzzles, RD(∗) and RK(∗). The first one denotes the deviations in the decays driven by the charged current in the ratio of the decay widths for B → D(∗)τν and B → D(∗)μν, while the second one is related to the ratio of the decay widths for B → K (∗) μ+ μ− and B → K (∗) e+ e− transition. Also, the measured muon anomalous magnetic moment differs from the SM predictions. Usually, the effective Lagrangian approach containing New Physics effects is used to analyse RD(∗) and RK(∗). Among many models of New Physics, various leptoquark models are suggested to 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.
Published as SciPost Phys. Proc. 1, 010 (2019)
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Anonymous Report 1 on 2018-11-26 (Contributed Report)
The writeup is a useful summary of the status of theoretical studies of possible signs of violations of Lepton Flavour Universality in B-meson decays and a valuable contribution to the proceedings.