The breaking of the $SU(2{)}_L\times U(1{)}_Y$ symmetry: The 750 GeV resonance at the LHC and perturbative unitarity

Abstract

If the di-photon excess at 750 GeV hinted by the 2015 data at the LHC is explained in terms of a scalar resonance participating in the breaking of the electro-weak symmetry, this resonance must be accompanied by other scalar states for perturbative unitarity in vector boson scattering to be preserved. The simplest set-up consistent with perturbative unitarity and with the data of the di-photon excess is the Georgi-Machacek model.

9 pages, 5 figures. v2: Minor changes, bibliography updated. v3: Minor changes

References in corpus (16)

• What is the gamma gamma resonance at 750 GeV?
• Rays of light from the LHC
• Scattering Light by Light at 750 GeV at the LHC
• The Minimal Model of a Diphoton Resonance: Production without Gluon Couplings
• First interpretation of the 750 GeV di-photon resonance at the LHC
• Knocking on New Physics' door with a Scalar Resonance
• The decoupling limit in the Georgi-Machacek model
• Unitarity bounds in the Higgs model including triplet fields with custodial symmetry
• On the 750 GeV di-photon excess
• Indirect Constraints on the Scalar Di-Photon Resonance at the LHC
• Indirect constraints on the Georgi-Machacek model and implications for Higgs couplings
• Gluon vs. Photon Production of a 750 GeV Diphoton Resonance
• Searches of exotic Higgs bosons in general mass spectra of the Georgi-Machacek model at the LHC
• Properties and searches of the exotic neutral Higgs bosons in the Georgi-Machacek model
• Automatic predictions in the Georgi-Machacek model at next-to-leading order accuracy
• A new scalar resonance at 750 GeV: Towards a proof of concept in favor of strongly interacting theories

Cited by in corpus (17)

• Vector Leptoquarks and the 750 GeV Diphoton Resonance at the LHC
• 750 GeV Diphoton Resonance from Singlets in an Exceptional Supersymmetric Standard Model
• Digamma, what next?
• Interpreting the 750 GeV digamma excess: a review
• Diphoton excess at 750 GeV and LHC constraints in models with vector-like particles
• Diphoton Excess and Running Couplings
• Threshold enhancement of diphoton resonances
• Di-Photon excess in the 2HDM: hasting towards the instability and the non-perturbative regime
• Systematic Study of Diphoton Resonance at 750 GeV from Sgoldstino
• Diphotons from an Electroweak Triplet-Singlet
• Topological Structure of the Vacuum, Cosmological Constant and Dark Energy
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• Diphoton excess and VV-scattering
• Learning from the New Higgs-like Scalar before It Vanishes
• Diphoton decay for a 750 GeV scalar boson in a $SU(6)\otimes U(1{)}_X$ model
• Minimal Dilaton Model and the Diphoton Excess
• Radiative neutrino models in light of diphoton signals