b → sℓ+ℓ− transitions in two-Higgs-doublet models
| Autor: | Christoph Wiegand, Andreas Crivellin, Dario Müller |
|---|---|
| Přispěvatelé: | University of Zurich, Crivellin, Andreas |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Nuclear and High Energy Physics Particle physics Higgs Physics Muon Anomalous magnetic dipole moment 530 Physics 010308 nuclear & particles physics Physics beyond the Standard Model High Energy Physics::Phenomenology Yukawa potential 10192 Physics Institute 01 natural sciences Beyond Standard Model 0103 physical sciences Heavy Quark Physics Higgs boson lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity 3106 Nuclear and High Energy Physics Neutrino 010306 general physics Phenomenology (particle physics) Lepton |
| Zdroj: | Journal of High Energy Physics Journal of High Energy Physics, Vol 2019, Iss 6, Pp 1-34 (2019) Crivellin, Andreas; Müller, Dario; Wiegand, Peter Christoph (2019). b → sℓ+ℓ− transitions in two-Higgs-doublet models. Journal of High Energy Physics, 2019(6), p. 119. Springer 10.1007/JHEP06(2019)119 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/jhep06(2019)119 |
| Popis: | In this article we study b → sμ + μ − transitions and possible correlations with the anomalous magnetic moment of the muon (a μ ) within two-Higgs-doublet models with generic Yukawa couplings, including the possibility of right-handed neutrinos. We perform the matching on the relevant effective Hamiltonian and calculate the leading one-loop effects for b → sℓℓ (′), b → sγ, ΔB = ΔS = 2, $$ b\to s\nu \overline{v} $$ b → s ν v ¯ and ℓ → ℓ′γ transitions in a general R ξ gauge. Concerning the phenomenology, we find that an explanation of the hints for new physics in b → sμ + μ − data is possible once right-handed neutrinos are included. If lepton flavour violating couplings are allowed, one can account for the discrepancy in a μ as well. However, only a small portion of parameter space gives a good fit to b → sμ + μ − data and the current bound on h → τμ requires the mixing between the neutral Higgses to be very small if one aims at an explanation of a μ . |
| Databáze: | OpenAIRE |
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