Violation of lepton flavour universality in composite Higgs models
By C. Niehoff, P. Stangl, David M. Straub. 2015
142 citations recorded by the source corpus.
Abstract We investigate whether the 2.6σ deviation from lepton flavour universality in B + → K + l + l − decays recently observed at the LHCb experiment can be explained in minimal composite Higgs models. We show that a visible departure from universality is indeed possible if left-handed muons have a sizable degree of compositeness. Constraints from Z-pole observables are avoided by a custodial protection of the muon coupling.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/acbea162ea03d9ce9b3c65650b10d5188ec11696
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In Nuclear and High Energy Physics
- S. Descotes-Genon
- J. Virto
- B. Capdevila
- Andreas Crivellin
- J. Matias
- Marco Nardecchia
- Simone Bifani
- M. Schune
Citations in the corpus
- Lepton flavor non-universality in B-meson decays from a U(2) flavor model (2015, background): “Some papers in the literature have attempted to obtain this connection in the context of partial compositeness [19, 25, 28] or leptoquark models [30].”
- Patterns of New Physics in b → sℓ+ℓ− transitions in the light of recent data (2017, background): “Composite Higgs models are also able to achieve this pattern of deviations [66].”
- Review of lepton universality tests in B decays (2018, background): “Composite Higgs models are also able to achieve this pattern of deviations [215].”