Diphoton Decay Excess and 125 GeV Higgs Boson in Gauge-Higgs Unification

Abstract

In the context of gauge-Higgs unification scenario in a 5-dimensional flat spacetime, we investigate Higgs boson production via gluon fusion and its diphoton decay mode at the LHC. We show that the signal strength of the Higgs diphoton decay mode observed at ATLAS and CMS, which is considerably larger than the Standard Model expectation, can be explained by a simple gauge-Higgs unification model with color-singlet bulk fermions to which a half-periodic boundary condition is assigned. The bulk fermions also play a crucial role in reproducing the observed Higgs boson mass around 125 GeV.

20 pages, 6 figures, a final version to appear in PRD

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• Polyakov loops and the Hosotani mechanism on the lattice
• Implications of LHC data on 125GeV Higgs-like boson for the Standard Model and its various extensions
• Vector-like top/bottom quark partners and Higgs physics at the LHC
• LHC signals of the $SO(5)\times U(1)$ gauge-Higgs unification
• Precision Higgs Measurements: Constraints from New Oblique Corrections
• Fermion Mass Hierarchy in Grand Gauge-Higgs Unification
• Vector bileptons and the decays $h\to \gamma \gamma ,Z\gamma$
• GUT-Inspired Supersymmetric Model for h\rightarrow γγand Muon g-2
• H to Z gamma in Gauge-Higgs Unification
• Revisiting Electroweak Symmetry Breaking and Higgs Mass in Gauge-Higgs Unification
• Fermion Dark Matter in Gauge-Higgs Unification
• Simple fermionic dark matter models and Higgs boson couplings
• Bayesian analysis and naturalness of (Next-to-)Minimal Supersymmetric Models
• Vacuum stability bounds on Higgs coupling deviations
• Dark matter in the $SO(5)\times U(1)$ gauge-Higgs unification
• $SU(2{)}_L$ Doublet Vector Dark Matter from Gauge-Higgs Unification
• The Higgs Particle and Higher-Dimensional Theories
• Improving Fermion Mass Hierarchy in Grand Gauge-Higgs Unification with Localized Gauge Kinetic Terms
• Fermionic Minimal Dark Matter in 5D Gauge-Higgs Unification
• 125 GeV Higgs boson mass from 5D gauge-Higgs unification
• Constraints on gauge-Higgs unification models at the LHC
• Strong First Order Electroweak Phase Transition in Gauge-Higgs Unification at Finite Temperature
• Higgs Decays in Gauge Extensions of the Standard Model