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b → sℓ+ℓ− transitions in two-Higgs-doublet models


Crivellin, Andreas; Müller, Dario; Wiegand, Christoph (2019). b → sℓ+ℓ− transitions in two-Higgs-doublet models. Journal of High Energy Physics, 2019(6):119.

Abstract

In this article we study b → sμ+μ− transitions and possible correlations with the anomalous magnetic moment of the muon (aμ) 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→sνv¯¯¯ and ℓ → ℓ′γ transitions in a general Rξ 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 aμ 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 aμ.

Abstract

In this article we study b → sμ+μ− transitions and possible correlations with the anomalous magnetic moment of the muon (aμ) 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→sνv¯¯¯ and ℓ → ℓ′γ transitions in a general Rξ 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 aμ 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 aμ.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > Nuclear and High Energy Physics
Uncontrolled Keywords:Nuclear and High Energy Physics
Language:English
Date:1 June 2019
Deposited On:12 Sep 2019 11:05
Last Modified:22 Apr 2020 21:07
Publisher:Springer
ISSN:1029-8479
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/jhep06(2019)119

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