Novel Constraint on Parameter Space of the Georgi-Machacek Model by Current LHC Data

Abstract

The same-sign diboson process $pp\to W^{\pm }{W}^{\pm }jj$ has been measured at the LHC using leptonic decay channels of the $W$ bosons, with production cross sections of two fiducial regions reported to be consistent with the standard model expectations within 1 sigma. These results constrain new physics models with a modified $W^{+}{W}^{+}{W}^{-}{W}^{-}$ vertex. We consider in particular the Georgi-Machacek model in which the quartic $W$ boson vertex is effectively modified due to mediations of new Higgs bosons in the model. The relevant gauge-gauge-scalar couplings are all proportional to the vacuum expectation value of the isospin triplets, which can be of $\mathcal{O}(10)$ GeV because of custodial vacuum alignment. Using the current 8-TeV data at the LHC, we exclude parameter space on the plane of the triplet vacuum expectation value and the new Higgs boson mass. The expected discovery reach at the 14-TeV LHC is also studied.

10 pages, 3 figures, references added, Fig. 1 modified

References in corpus (6)

• A search for a doubly-charged Higgs boson in pp collisions at sqrt(s) = 7 TeV
• The decoupling limit in the Georgi-Machacek model
• Unitarity bounds in the Higgs model including triplet fields with custodial symmetry
• Leptonic signatures of doubly charged Higgs boson production at the LHC
• Potential for measuring the H^\pm W^\mp Z^0 vertex from WZ fusion at the Large Hadron Collider
• Testing Higgs models via the $H^{\pm }{W}^{\mp }Z$ vertex by a recoil method at the International Linear Collider

Cited by in corpus (20)

• Real singlet scalar dark matter extension of the Georgi-Machacek model
• Characterizing a benchmark scenario for heavy Higgs boson searches in the Georgi-Machacek model
• The 95 GeV Excess in the Georgi-Machacek Model: Single or Twin Peak Resonance
• Supersymmetric Custodial Higgs Triplets and the Breaking of Universality
• Searching for the doubly-charged Higgs bosons in the Georgi-Machacek model at the electron-proton colliders
• 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
• Constraining the Georgi-Machacek Model with a Light Higgs
• Impact of Yukawa-like dimension-5 operators on the Georgi-Machacek model
• Vacuum structure of the ${\mathbb{Z}}_2$ symmetric Georgi-Machacek model
• Updated constraints on the Georgi-Machacek model from LHC Run 2
• Searching for the heavy custodial fiveplet Higgs in the Georgi-Machacek model at the International Linear Collider
• New physics implications of VBF searches exemplified through the Georgi-Machacek model
• Some new observations for the Georgi-Machacek scenario with triplet Higgs
• The hidden side of scalar-triplet models with spontaneous CP violation
• $WWV$ $(V=\gamma ,Z)$ vertex 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
• Fermionic decay of charged Higgs boson in low mass region in Georgi Machacek Model
• Doubly charged Higgs boson at same-sign lepton colliders
• Sensitivity to longitudinal vector boson scattering in semileptonic final states at the HL-LHC