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Theory Status - Puzzles in B Meson Decays and LFU?
by Svjetlana Fajfer
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Submission summary
| Authors (as Contributors): | Svjetlana Fajfer |
| Submission information | |
|---|---|
| Preprint link: | scipost_201811_00018v1 |
| Date accepted: | 2019-01-15 |
| 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) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Theoretical |
Abstract
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)
Submission & Refereeing History
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Reports on this Submission
Anonymous Report 1 on 2018-11-26 (Contributed Report)
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.