Crivellin, A. (2015) B decays and lepton flavour (universality) violation. Il nuovo cimento C, 38 (4). pp. 1-9. ISSN 1826-9885
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Abstract
LHCb found hints for physics beyond the standard model in B → K ∗ μ+μ−, B → K ∗ μ+μ− /B → K ∗ e+e− and Bs → φμ+μ−. In addition, the BABAR results for B → D(∗)τν and the CMS excess in h → τ ± μ∓ also point towards lepton flavour (universality) violating new physics. While B → D(∗)τν and h → τ ± μ∓ can be naturally explained by an extended Higgs sector, the probably most promising explanation for the b → sμμ anomalies is a Z' boson. Furthermore, combining a 2HDM with a gauged Lμ − Lτ symmetry allows for explaining the b → sμ+μ− anomalies and h → τ ± μ∓ simultaneously, with interesting correlations to τ → 3μ. In the light of these deviations from the SM we also discuss the possibilities of observing lepton flavour violating B decays (e.g. B → K(∗)τ ± μ∓ and Bs → τ± μ∓) in Z' models.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Flavor symmetries; Extensions of electroweak gauge Sector; Extensions of electroweak Higgs Sector; Decays of bottom mesons |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 16 Jun 2020 07:35 |
| Last Modified: | 16 Jun 2020 07:35 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/19120 |
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