One-loop expressions for $h\to l\bar{l}\gamma$ in Higgs extensions of the Standard Model

Abstract

A systematic study of one-loop contributions to the decay channels $h\to l\bar{l}\gamma$ with $l={\nu }_{e,\mu ,\tau },e,\mu$, performed in Higgs extended versions of the Standard Model, is presented in the 't Hooft-Veltman gauge. Analytic formulas for one-loop form factors are expressed in terms of the logarithm and di-logarithmic functions. As a result, these form factors can be reduced to those relating to the loop-induced decay processes $h\to \gamma \gamma ,Z\gamma$, confirming not only previous results using different approaches but also close relations between the three kinds of the loop-induced Higgs decay rates. For phenomenological study, we focus on the two observables, namely the enhancement factors defined as ratios of the decay rates calculated between the Higgs extended versions and the standard model, and the forward-backward asymmetries of fermions, which can be used to search for Higgs extensions of the SM. We show that direct effects of mixing between neutral Higgs bosons and indirect contributions of charged Higg boson exchanges can be probed at future colliders.

39 pages, 9 Figures, 11 Tables of data

References in corpus (18)

• Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV
• Status of the Inert Doublet Model and the Role of multileptons at the LHC
• Vacuum Stability, Perturbativity, EWPD and Higgs-to-diphoton rate in Type II Seesaw Models
• Fingerprinting non-minimal Higgs sectors
• Exploring collider signatures of the inert Higgs doublet model
• Higgs boson decays to $\gamma \gamma$ and $Z\gamma$ in models with Higgs extensions
• LHC Phenomenology of Type II Seesaw: Nondegenerate Case
• Dark matter, neutrino masses and high scale validity of an inert Higgs doublet model
• Systematic study of the SU(3)_c X SU(4)_L X U(1)_X gauge symmetry
• Higgs pair productions in the CP-violating two-Higgs-doublet model
• Electroweak Phase Transition and Gravitational Waves in the Type-II Seesaw Model
• Angular distribution and forward-backward asymmetry of the Higgs-boson decay to photon and lepton pair
• Search for a scalar or vector particle decaying into Zgamma in ppbar collisions at sqrt(s) = 1.96 TeV
• $S{U}_L(4)\times U(1)$ model for electroweak unification and sterile neutrinos
• Degenerate Higgs bosons decays to $\gamma \gamma$ and $Z\gamma$ in the type II Seesaw Model
• Higgs-like particle decays into $\gamma Z$ and $\gamma \gamma$ : Fingerprints of some non-supersymmetric models
• Hypergeometric presentation for one-loop contributing to $H\to Z\gamma$
• One-loop $W$ boson contributions to the decay $H\to Z\gamma$ in the general $R_{\xi }$ gauge

Cited by in corpus (2)

• Decays of Standard Model like Higgs boson $h\to \gamma \gamma ,Z\gamma$ in a minimal left-right symmetric model
• $H\to Z\gamma$ decay and $CP$ violation