Higgs boson decay to lepton pair and photon and possible non-Hermiticity of the Yukawa interaction

The production of lepton pairs in the Higgs boson decay \(h \to \ell^+ \ell^- \gamma\) is studied. The emphasis is put on the structure of the Higgs boson interaction with the fermions. This interaction is chosen as a mixture of the scalar and pseudo-scalar couplings, and, in addition, it is suppose...

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Bibliographic Details
Published in:arXiv.org 2020-06
Main Authors: Kovalchuk, V A, A Yu Korchin
Format: Article
Language:English
Subjects:
Asymmetry
Couplings
Fermions
Higgs bosons
Leptons
Particle decay
Quarks
Online Access:Get full text
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Summary:The production of lepton pairs in the Higgs boson decay \(h \to \ell^+ \ell^- \gamma\) is studied. The emphasis is put on the structure of the Higgs boson interaction with the fermions. This interaction is chosen as a mixture of the scalar and pseudo-scalar couplings, and, in addition, it is supposed to be non-Hermitian. We study prediction of this model for the observables in the \(h \to \ell^+ \ell^- \gamma\) decay for the \(e^+ e^-\), \(\mu^+ \mu^-\) and \(\tau^+ \tau^-\) pairs. The differential decay width and lepton forward-backward asymmetry are calculated as functions of the dilepton invariant mass for several sets of \(h f \bar{f}\) coupling constants. The influence of non-Hermitian \(h f \bar{f}\) interaction on the forward-backward asymmetry is studied, and large influence of a possible non-Hermiticity of the Higgs interaction with the top quarks on forward-backward asymmetry for \(e^+ e^-\) and \(\mu^+ \mu^-\) pairs is stressed.
ISSN:2331-8422
DOI:10.48550/arxiv.2006.09672