Constraining the CP structure of Higgs-fermion couplings with a global LHC fit, the electron EDM and baryogenesis

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Bahl, H.; Fuchs, E.; Heinemeyer, S.; Katzy, J.; Menen, M. et al.: Constraining the CP structure of Higgs-fermion couplings with a global LHC fit, the electron EDM and baryogenesis. In: The European Physical Journal : C, Particles and fields 82 (2022), Nr. 7, 604. DOI: https://doi.org/10.1140/epjc/s10052-022-10528-1

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Abstract: 
CP violation in the Higgs couplings to fermions is an intriguing, but not yet extensively explored possibility. We use inclusive and differential LHC Higgs boson measurements to fit the CP structure of the Higgs Yukawa couplings. Starting with simple effective models featuring CP violation in a single Higgs–fermion coupling, we probe well-motivated models with up to nine free parameters. We also investigate the complementarity of LHC constraints with the electron electric dipole moment bound, taking into account the possibility of a modified electron Yukawa coupling, and assess to which extent CP violation in the Higgs–fermion couplings can contribute to the observed baryon asymmetry of the universe. Even after including the recent analysis of angular correlations in H→ τ+τ- decays, we find that a complex tau Yukawa coupling alone may be able to account for the observed baryon asymmetry, but with large uncertainties in the baryogenesis calculation. A combination of complex top and bottom quark Yukawa couplings yields a result four times larger than the sum of their separate contributions, but remains insufficient to account for the observed baryon asymmetry. © 2022, The Author(s).
License of this version: CC BY 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2022
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
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1 image of flag of Germany Germany 20 45.45%
2 image of flag of United States United States 14 31.82%
3 image of flag of China China 4 9.09%
4 image of flag of United Kingdom United Kingdom 2 4.55%
5 image of flag of Taiwan Taiwan 1 2.27%
6 image of flag of Sweden Sweden 1 2.27%
7 image of flag of Russian Federation Russian Federation 1 2.27%
8 image of flag of Canada Canada 1 2.27%

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