Angular distribution and forward-backward asymmetry of the Higgs-boson decay to photon and lepton pair

Abstract

The Higgs-boson decay h -> gamma l+ l- for various lepton states l = (e, mu, tau) is analyzed. The differential decay width and forward-backward asymmetry are calculated as functions of the dilepton invariant mass in a model where the Higgs boson interacts with leptons and quarks via a mixture of scalar and pseudoscalar couplings. These couplings are partly constrained from data on the decays to leptons, h -> l+ l-, and quarks h -> q \bar{q} (where q = (c, b)), while the Higgs couplings to the top quark are chosen from the two-photon and two-gluon decay rates. Nonzero values of the forward-backward asymmetry will manifest effects of new physics in the Higgs sector. The decay width and asymmetry integrated over the dilepton invariant mass are also presented.

9 pages, 4 figures, SVJour3 class; v2: minor changes in text, references updated and extended, corresponds to journal version

References in corpus (10)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs
• Complex Singlet Extension of the Standard Model
• An Exclusive Window onto Higgs Yukawa Couplings
• Search for the Standard Model Higgs boson decay to ${\mu }^{+}{\mu }^{-}$ with the ATLAS detector
• New Observables for CP Violation in Higgs Decays
• Calculation of the decay ${\bm H\bm\to\bm e\bar{\bm e}\bm\ga}$
• A note on Higgs decays into $Z$ boson and $J/\Psi ({\rm Y})$
• Probing New Physics in Higgs Couplings to Fermions using an Angular Analysis

Cited by in corpus (10)

• Search for Higgs and $Z$ Boson Decays to $J/\psi \gamma$ and ${\rm Y}(nS)\gamma$ with the ATLAS Detector
• Enhanced $thj$ signal at the LHC with $h\to \gamma \gamma$ decay and $\mathcal{C}\mathcal{P}$-violating top-Higgs coupling
• Decay of the Higgs boson to ${\tau }^{-}{\tau }^{+}$ and non-Hermiticity of the Yukawa interaction
• Characterising the Higgs boson with ATLAS data from Run 2 of the LHC
• One-loop expressions for $h\to l\bar{l}\gamma$ in Higgs extensions of the Standard Model
• Energy correlation of bottom quarks from decays of top quarks in electron$-$positron annihilation
• Exclusive rare Higgs decays into lepton pair and light mesons
• Exploring CP violation in $H\to {\tau }^{+}{\tau }^{-}\gamma$
• General one-loop formulas for $H\to f\bar{f}\gamma$ and its applications
• Higgs boson decay to lepton pair and photon and possible non-Hermiticity of the Yukawa interaction