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Current issue   Ukr. J. Phys. 2017, Vol. 62, N 7, p.557-564


Kovalchuk V.A.1,2, Korchin A.Yu.1,2

1 NSC “Kharkiv Institute of Physics and Technology”, NAS of Ukraine
(Akademichna, 1, 61108 Kharkiv, Ukraine)
2 V.N. Karazin Kharkiv National University
(Svobody Sq., 4, 61022 Kharkiv, Ukraine; e-mail: koval@kipt.kharkov.ua)

Higgs-Boson Decay to Lepton Pair and Photon and Possible Non-Hermiticity of the Yukawa Interaction

Section: Fields and Elementary Particles
Original Author's Text: Ukrainian

Abstract: The production of lepton pairs in the Higgs-boson decay is studied. The emphasis is put on the structure of the Higgs-boson interaction with 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 predictions of this model for the observables in the
decay for +−, +−, and +− pairs. The diferential decay width and lepton forward-
backward asymmetry are calculated as functions of the dilepton invariant mass for several
sets of coupling constants. The infuence of the non-Hermitian interaction on the
forward-backward asymmetry is studied, and the large infuence of a possible non-Hermiticity
of the Higgs interaction with the top quarks on the forward-backward asymmetry for +− and
+− pairs is stressed.

Key words:  Higgs-boson, non-Hermitian interaction, decay of Higgs boson.