Scalar decays to $\gamma \gamma$, $Z\gamma$, and $W\gamma$ in the Georgi-Machacek model

Abstract

We compute the decay widths for the neutral and singly-charged Higgs bosons in the Georgi-Machacek model into the final states $\gamma \gamma$, $Z\gamma$, and $W\gamma$. These decays are most phenomenologically interesting for the fermiophobic custodial fiveplet states $H_5^0$ and $H_5^{\pm }$ when their masses are below threshold for decays into $WW$, $ZZ$, or $WZ$. We study the allowed branching ratios into these final states using scans over the allowed parameter space, and show how the model can be constrained by LEP searches for a fermiophobic Higgs boson decaying to two photons. The calculation involves evaluating one-loop diagrams in which the loop contains particles with two different masses, some of which do not appear in the existing literature. We give results for these diagrams in a form convenient for numerical implementation using the LoopTools package.

26 pages, 5 figures. v2: refs added, typos fixed, version accepted by PRD. v3: fixed missing factor of 2 in Eq. (37) (numerics were correct already)

References in corpus (26)

• 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
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Evidence for Electroweak Production of $W^{\pm }{W}^{\pm }jj$ in $pp$ Collisions at $\sqrt{s}=8$ TeV with the ATLAS Detector
• Study of vector boson scattering and search for new physics in events with two same-sign leptons and two jets
• The decoupling limit in the Georgi-Machacek model
• LHC HXSWG interim recommendations to explore the coupling structure of a Higgs-like particle
• Search for anomalous production of prompt same-sign lepton pairs and pair-produced doubly charged Higgs bosons with $\sqrt{s}=8$ TeV $pp$ collisions using the ATLAS detector
• Unitarity bounds in the Higgs model including triplet fields with custodial symmetry
• Indirect constraints on the Georgi-Machacek model and implications for Higgs couplings
• Novel Constraint on Parameter Space of the Georgi-Machacek Model by Current LHC Data
• Higgs couplings in a model with triplets
• Revisiting Theories with Enhanced Higgs Couplings to Weak Gauge Bosons
• Search for charged Higgs bosons produced in vector boson fusion processes and decaying into a pair of W and Z bosons using proton-proton collisions at sqrt(s) = 13 TeV
• Electroweak Phase Transition in Georgi-Machacek Model
• LHC Run-I constraint on the mass of doubly charged Higgs bosons in the same-sign diboson decay scenario
• Effects of custodial symmetry breaking in the Georgi-Machacek model at high energies
• Real singlet scalar dark matter extension of the Georgi-Machacek model
• Low-mass fermiophobic charged Higgs phenomenology in two-Higgs-doublet models
• Supersymmetric Custodial Higgs Triplets and the Breaking of Universality
• Double Higgs production at LHC, see-saw type II and Georgi-Machacek model
• Charged Higgs Bosons decays H^\pm \to W^\pm (γ, Z) revisited
• GMCALC: a calculator for the Georgi-Machacek model
• Radiative corrections to Higgs couplings with weak gauge bosons in custodial multi-Higgs models
• Searching for the heavy custodial fiveplet Higgs in the Georgi-Machacek model at the International Linear Collider
• $WWV$ $(V=\gamma ,Z)$ vertex in the Georgi-Machacek model

Cited by in corpus (23)

• Global fits in the Georgi-Machacek model
• Vacuum misalignment and pattern of scalar masses in the SU(5)/SO(5) composite Higgs model
• Custodial symmetry violation in the Georgi-Machacek model
• Charged Higgs searches in the Georgi-Machacek model at the LHC
• Neutral Higgs decays $H\to Z\gamma ,\gamma \gamma$ in 3-3-1 models
• Cornering variants of Georgi-Machacek model using Higgs precision data
• The $W\gamma$ decay of the elusive charged Higgs boson in the two-Higgs-doublet model with vectorlike fermions
• General one-loop formulas for decay $h\to Z\gamma$
• A benchmark for LHC searches for low-mass custodial fiveplet scalars in the Georgi-Machacek model
• Updated constraints on Georgi-Machacek model, and its electroweak phase transition and associated gravitational waves
• Unavoidable Higgs coupling deviations in the $Z_2$-symmetric Georgi-Machacek model
• Searching for the $W\gamma$ decay of a charged Higgs boson
• Impact of Yukawa-like dimension-5 operators on the Georgi-Machacek model
• Light (and darkness) from a light hidden Higgs
• More Constraints on the Georgi-Machacek Model
• Probing the $H^{\pm }{W}^{\mp }Z$ interaction at the high energy upgrade of the LHC
• Updated constraints on the Georgi-Machacek model from LHC Run 2
• Probing the Higgs boson through Yukawa force
• Some new observations for the Georgi-Machacek scenario with triplet Higgs
• Decays of Standard Model like Higgs boson $h\to \gamma \gamma ,Z\gamma$ in a minimal left-right symmetric model
• Charged Higgs decay to $W^{\pm }$ and heavy neutral Higgs decaying into ${\tau }^{+}{\tau }^{-}$ in Georgi Machacek Model at LHC
• $H\to Z\gamma$ decay and $CP$ violation
• Diphoton signals for the Georgi-Machacek scenario at the Large Hadron Collider