Characterizing a benchmark scenario for heavy Higgs boson searches in the Georgi-Machacek model

Abstract

The Georgi-Machacek model is used to motivate and interpret LHC searches for doubly- and singly-charged Higgs bosons decaying into vector boson pairs. In this paper we study the constraints on and phenomenology of the "H5plane" benchmark scenario in the Georgi-Machacek model, which has been proposed for use in these searches. We show that the entire H5plane benchmark is compatible with the LHC measurements of the 125 GeV Higgs boson couplings. We also point out that, over much of the H5plane benchmark, the lineshapes of the two CP-even neutral heavy Higgs bosons $H$ and $H_5^0$ will overlap and interfere when produced in vector boson fusion with decays to $W^{+}{W}^{-}$ or $ZZ$. Finally we compute the decay branching ratios of the additional heavy Higgs bosons within the H5plane benchmark to facilitate the development of search strategies for these additional particles.

arXiv comment18 pages, 18 figures. v2: title changed, refs added, discussion clarified, version accepted by PRD

References in corpus (14)

• 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
• Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
• 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
• Unitarity bounds in the Higgs model including triplet fields with custodial symmetry
• Indirect constraints on the Georgi-Machacek model and implications for Higgs couplings
• Search for a Charged Higgs Boson Produced in the Vector-boson Fusion Mode with Decay $H^{\pm }\to W^{\pm }Z$ using $pp$ Collisions at $\sqrt{s}=8$ TeV with the ATLAS Experiment
• Novel Constraint on Parameter Space of the Georgi-Machacek Model by Current LHC Data
• 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
• Searches of exotic Higgs bosons in general mass spectra of the Georgi-Machacek model at the LHC
• GMCALC: a calculator for the Georgi-Machacek model

Cited by in corpus (17)

• Global fits in the Georgi-Machacek model
• Electroweak phase transition and Higgs phenomenology 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
• Updated constraints on Georgi-Machacek model, and its electroweak phase transition and associated gravitational waves
• A benchmark for LHC searches for low-mass custodial fiveplet scalars in the Georgi-Machacek model
• Unavoidable Higgs coupling deviations in the $Z_2$-symmetric Georgi-Machacek model
• Measurement and interpretation of same-sign $W$ boson pair production in association with two jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Unitarity constraints in triplet extensions beyond the large s limit
• Search for resonant $WZ\to \ell \nu {\ell }^{\prime }{\ell }^{\prime }$ production in proton$-$proton collisions at $\sqrt{\mathbf{s}}=13$ TeV with the ATLAS detector
• Light (and darkness) from a light hidden Higgs
• Updated constraints on the Georgi-Machacek model from LHC Run 2
• Search for a lighter neutral custodial fiveplet scalar in the Georgi-Machacek model
• Charged Higgs decay to $W^{\pm }$ and heavy neutral Higgs decaying into ${\tau }^{+}{\tau }^{-}$ in Georgi Machacek Model at LHC
• LHC Signatures of the Generic Georgi-Machacek Model
• Doubly charged Higgs boson at same-sign lepton colliders
• Tagging ultra-boosted jets at FCC-hh using machine learning techniques