Interpretation of 750 GeV Diphoton Excess at LHC in Singlet Extension of Color-octet Neutrino Mass Model

Abstract

We propose that the possible 750 GeV diphoton excess can be explained in the color-octet neutrino mass model extended with a scalar singlet $\Phi$. The model generally contains $N_s$ species of color-octet, electroweak doublet scalars $S$ and $N_f$ species of color-octet, electroweak triplet $\chi$ or singlet $\rho$ fermions. While both scalars and fermions contribute to the production of $\Phi$ through gluon fusion, only the charged members induce the diphoton decay of $\Phi$. The diphoton rate can be significantly enhanced due to interference between the scalar and fermion loops. We show that the diphoton cross section can be from 3 to 10 fb for O(TeV) color-octet particles while evading all current LHC limits.

12 pages, 4 figures; v2: 13 pages, 4 figures, version to appear in EPJC, clarified a few things, updated numerical analysis using the most recent bound on color-octet fermions but without changing conclusions, corrected a mistake when quoting the branching ratio to Z gamma, added some references missed in v1

References in corpus (28)

• Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Search for new phenomena in the dijet mass distribution using $p-p$ collision data at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for Scalar Diphoton Resonances in the Mass Range $65-600$ GeV with the ATLAS Detector in $pp$ Collision Data at $\sqrt{s}$ = 8 $TeV$
• Flavor Changing Neutral Currents, an Extended Scalar Sector, and the Higgs Production Rate at the LHC
• Colored Resonant Signals at the LHC: Largest Rate and Simplest Topology
• Di-photon resonance around 750 GeV: shedding light on the theory underneath
• Search for pair-produced resonances decaying to jet pairs in proton-proton collisions at sqrt(s) = 8 TeV
• The Minimal Scalar-Stealth Top Interpretation of the Diphoton Excess
• A Boost Test of Anomalous Diphoton Resonance at the LHC
• Search for supersymmetry at sqrt(s)=8 TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector
• Color Octet Scalar Production at the LHC
• Interpreting $750$ GeV Diphoton Excess with R-parity Violating Supersymmetry
• On the Origin of Neutrino Masses
• Radion Candidate for the LHC Diphoton Resonance
• LHC diphotons from electroweakly pair-produced composite pseudoscalars
• The LHC 750 GeV diphoton excess in supersymmetry with gauged baryon and lepton numbers
• LHC diphoton 750 GeV resonance as an indication of $SU(3{)}_c\times SU(3{)}_L\times U(1{)}_X$ gauge symmetry
• Strong CP Problem, Neutrino Masses and the 750 GeV Diphoton Resonance
• LHC diphoton excess from colorful resonances
• The Diphoton Excess from an Exceptional Supersymmetric Standard Model
• Broad Diphotons from Narrow States
• Dark Matter Theories in the Light of Diphoton Excess
• Diphoton excess at 750 GeV in an extended scalar sector
• Diphoton Excess in Consistent Supersymmetric SU(5) Models with Vector-like Particles
• Probing degenerate heavy Higgs bosons in NMSSM with vector-like particles
• Diphoton Revelation of the Utilitarian Supersymmetric Standard Model
• Pseudoscalar Gluinonia to 750 GeV LHC Diphotons
• Lepton Number Violation from Colored States at the LHC

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• Confronting a New Three-loop Seesaw Model with the 750 GeV Diphoton Excess
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• Models of LHC Diphoton Excesses Valid up to the Planck scale
• An Extended Colored Zee-Babu Model
• A four-loop Radiative Seesaw Model
• Note on Spin-2 Particle Interpretation of the 750~GeV Diphoton Excess
• Diphotons from Diaxions
• Hunting for Heavy Majorana Neutrinos with Lepton Number Violating Signatures at LHC
• Systematic Study of Diphoton Resonance at 750 GeV from Sgoldstino
• Testing Type II Radiative Seesaw Model: from Dark Matter Detection to LHC Signatures
• A Flippon Related Singlet at the LHC II
• Radiative Seesaw Model with Degenerate Majorana Dark Matter
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• Topological Structure of the Vacuum, Cosmological Constant and Dark Energy
• Exploring the Jet Multiplicity in the 750 GeV Diphoton Excess
• Diphoton decay for a 750 GeV scalar boson in a $SU(6)\otimes U(1{)}_X$ model
• Learning from the New Higgs-like Scalar before It Vanishes
• Minimal Dilaton Model and the Diphoton Excess
• From the 750 GeV Diphoton Resonance to Multilepton Excesses
• Boosted scalar confronting 750 GeV di-photon excess
• Active Dirac Neutrinos via $SU(2{)}_L$ Doublets in 5d
• The Observed Diphoton Excess in F-theory Inspired Heterotic String-Derived Model
• Fingerprinting the contribution of colored scalars to the $H^{+}{W}^{-}Z(\gamma )$ vertex
• Colour Octet Extension of 2HDM
• Heavy neutral scalar decays into electroweak gauge bosons in the Littlest Higgs Model