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Quark masses, CKM angles and Lepton Flavour Universality violation
- Publication Year :
- 2019
-
Abstract
- A properly defined and suitably broken $U(2)$ flavour symmetry leads to successful quantitative relations between quark mass ratios and CKM angles. At the same time the intrinsic distinction introduced by $U(2)$ between the third and the first two families of quarks and leptons may support anomalies in charged and neutral current semi-leptonic $B$-decays of the kind tentatively observed in current flavour experiments. We show how this is possible by the exchange of the $(3,1)_{2/3}$ vector leptoquark in two $U(2)$-models with significantly different values of Lepton Flavour Universality violation, observable in foreseen experiments.<br />Comment: 19 pages, 2 figures; in v2 several points clarified, no change of results, matches published version
- Subjects :
- High Energy Physics - Phenomenology
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1904.04121
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1007/JHEP07(2019)023