Diphoton excess at 750 GeV: Singlet scalars confront triviality

Abstract

We suggest that the recently observed diphoton excess at 750 GeV comes from a quasi-degenerate bunch of gauge singlet scalars produced and decaying through one or more vector-like fermions. This explains the broad nature of the resonance, even though the decay is loop-mediated. At the same time, the model keeps the new Yukawa couplings in the perturbative region, which is necessary for the stability of the potential.

7 pages, 4 figures, uses pdflatex. v2: Slight change in the title, the naturalness argument in the text as well as Fig. 1(b) removed, the rest remains unchanged. More references added. Version to be published in Phys. Rev. D

References in corpus (44)

• What is the gamma gamma resonance at 750 GeV?
• Composite Models for the 750 GeV Diphoton Excess
• Scenarii for interpretations of the LHC diphoton excess: two Higgs doublets and vector-like quarks and leptons
• Phenomenology of a 750 GeV Singlet
• On the Interpretation of a Possible $\sim 750$ GeV Particle Decaying into $\gamma \gamma$
• Rays of light from the LHC
• The LHC diphoton resonance and dark matter
• Di-photon excess illuminates Dark Matter
• Scattering Light by Light at 750 GeV at the LHC
• The Minimal Model of a Diphoton Resonance: Production without Gluon Couplings
• A pseudoscalar decaying to photon pairs in the early LHC Run 2 data
• Footprints of New Strong Dynamics via Anomaly and the 750 GeV Diphoton
• Singlet Scalar Resonances and the Diphoton Excess
• First interpretation of the 750 GeV di-photon resonance at the LHC
• Diphoton Signatures from Heavy Axion Decays at the CERN Large Hadron Collider
• The diphoton resonance as a gravity mediator of dark matter
• Di-photon resonance around 750 GeV: shedding light on the theory underneath
• The Minimal Scalar-Stealth Top Interpretation of the Diphoton Excess
• A Boost Test of Anomalous Diphoton Resonance at the LHC
• The 750 GeV $S$-cion: Where else should we look for it?
• Interpretation of the diphoton excess at CMS and ATLAS
• Higgs singlet boson as a diphoton resonance in a vector-like quark model
• Implication of the 750 GeV diphoton resonance on two-Higgs-doublet model and its extensions with Higgs field
• See-Saw Composite Higgses at the LHC: Linking Naturalness to the $750$ GeV Di-Photon Resonance
• Interpreting the 750 GeV diphoton excess by the singlet extension of the Manohar-Wise Model
• A SUSY Inspired Simplified Model for the 750 GeV Diphoton Excess
• Implications of the absence of high-mass radion signals
• On sgoldstino interpretation of the diphoton excess
• Flavor Anomalies, the Diphoton Excess and a Dark Matter Candidate
• Asymmetric Dark Matter in the Sun and the Diphoton Excess at the LHC
• Singlets in Composite Higgs Models in light of the LHC di-photon searches
• Symmetries Behind the 750 GeV Diphoton Excess
• Effective interpretations of a diphoton excess
• Radion Candidate for the LHC Diphoton Resonance
• The LHC diphoton resonance from gauge symmetry
• LHC diphotons from electroweakly pair-produced composite pseudoscalars
• The production of a diphoton resonance via photon-photon fusion
• Supersoft SUSY Models and the 750 GeV Diphoton Excess, Beyond Effective Operators
• Perturbativity, vacuum stability and inflation in the light of 750 GeV diphoton excess
• Vector-like top/bottom quark partners and Higgs physics at the LHC
• Studying 750 GeV Di-photon Resonance at Photon-Photon Collider
• On dilatons and the LHC diphoton excess
• Potential of a singlet scalar enhanced Standard Model
• New signals for singlet Higgs and vector-like quarks at the LHC

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• Di-photon Excess Explained by a Resonant Sneutrino in R-parity Violating Supersymmetry
• Electroweak Vacuum Stability and Diphoton Excess at 750 GeV
• The 750 GeV diphoton excess and its explanation in 2-Higgs Doublet Models with a real inert scalar multiplet
• The Diphoton Excess, Low Energy Theorem and the 331 Model
• The 750 GeV Diphoton excess in a $U(1)$ hidden symmetry model
• Diphoton resonance at 750 GeV in the broken MRSSM
• Two Higgs doublets to explain the excesses $pp\to \gamma \gamma (750\mathrm{GeV})$ and $h\to {\tau }^{\pm }{\mu }^{\mp }$
• Perturbativity, vacuum stability and inflation in the light of 750 GeV diphoton excess
• The 750 GeV diphoton resonance as a singlet scalar in an extra dimensional model
• LHC 750 GeV Diphoton excess in a radiative seesaw model
• A Loop-philic Pseudoscalar
• Digamma, what next?
• Diphoton Excess at 750 GeV in leptophobic U(1)${}^{\prime }$ model inspired by $E_6$ GUT
• A Promising Interpretation of Diphoton Resonance at 750 GeV
• An O(750) GeV Resonance and Inflation
• Interpreting the 750 GeV digamma excess: a review
• Dark sector shining through 750 GeV dark Higgs boson at the LHC
• Explaining the diphoton excess in Alternative Left-Right Symmetric Model
• Higgs precision study of the 750 GeV diphoton resonance and the 125 GeV standard model Higgs boson with Higgs-singlet mixing
• Diphoton Excess in Consistent Supersymmetric SU(5) Models with Vector-like Particles
• NMSSM extended with vectorlike particles and the diphoton excess at the LHC
• Top-phobic heavy Higgs boson as the 750 GeV diphoton resonance
• 750 GeV Di-photon excess at CERN LHC from a dark sector assisted scalar decay
• Interpreting The 750 GeV Diphoton Excess Within Topflavor Seesaw Model
• How Resonance-Continuum Interference Changes 750 GeV Diphoton Excess: Signal Enhancement and Peak Shift
• Left-right asymmetry and 750 GeV diphoton excess
• Confronting a New Three-loop Seesaw Model with the 750 GeV Diphoton Excess
• Diphoton excess at 750 GeV and LHC constraints in models with vector-like particles
• Diphoton Excess and Running Couplings
• Models of LHC Diphoton Excesses Valid up to the Planck scale
• One Bump or Two Peaks? The 750 GeV Diphoton Excess and Dark Matter with a Complex Mediator
• Note on Spin-2 Particle Interpretation of the 750~GeV Diphoton Excess
• Di-Photon excess in the 2HDM: hasting towards the instability and the non-perturbative regime
• Interpreting 750 GeV Diphoton Excess in Plain NMSSM
• Systematic Study of Diphoton Resonance at 750 GeV from Sgoldstino
• The $750$ GeV Diphoton Excesses in a Realistic D-brane Model
• Diphoton excess at 750 GeV: gluon-gluon fusion or quark-antiquark annihilation?
• The 750GeV diphoton excess: who introduces it?
• A Flippon Related Singlet at the LHC II
• The 750 GeV diphoton excess in a two Higgs doublet model and a singlet scalar model, with vector-like fermions, unitarity constraints, and dark matter implications
• Topological Structure of the Vacuum, Cosmological Constant and Dark Energy
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• 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
• From the 750 GeV Diphoton Resonance to Multilepton Excesses
• Boosted scalar confronting 750 GeV di-photon excess
• Astrophysical Constraints on Singlet Scalars at LHC
• Hadron Correlations at Energies from GeV to TeV
• Positivity and unitarity constraints on dipole gluon distributions