Diphoton resonance confronts dark matter

Abstract

As an interpretation of the 750 GeV diphoton excesses recently reported by both ATLAS and CMS collaborations, we consider a simple extension of the Standard Model with a Dirac fermion dark matter where a singlet complex scalar field mediates between dark matter and SM particles via effective couplings to SM gauge bosons and/or Higgs-portal. In this model, we can accommodate the diphoton events through the direct and/or cascade decays of pseudo-scalar and real scalar partners of the complex scalar field. We show that mono-jet searches and gamma-ray observations are complementary in constraining the region where the width of the diphoton resonance can be enhanced due to the couplings of the resonance to dark matter and the correct relic density is obtained. In the case of cascade decay of the resonance, the effective couplings of singlet scalars can be smaller, but the model is still testable by the future discrimination between single photon and photon-jet at the LHC as well as the gamma-ray searches for the cascade annihilation of dark matter.

30 pages, 10 figures, To appear in Journal of High Energy Physics

References in corpus (45)

• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• Precise determination of the mass of the Higgs boson and tests of compatibility of its couplings with the standard model predictions using proton collisions at 7 and 8 TeV
• Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
• PAMELA results on the cosmic-ray antiproton flux from 60 MeV to 180 GeV in kinetic energy
• Dark Matter Constraints from Observations of 25 Milky Way Satellite Galaxies with the Fermi Large Area Telescope
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• Search for dark matter, extra dimensions, and unparticles in monojet events in proton-proton collisions at sqrt(s) = 8 TeV
• Measurements of the Higgs boson production and decay rates and coupling strengths using $pp$ collision data at $\sqrt{s}=7$ and $8$ TeV in the ATLAS experiment
• Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 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
• Updated Search for Spectral Lines from Galactic Dark Matter Interactions with Pass 8 Data from the Fermi Large Area Telescope
• Probing MeV to 90 GeV axion-like particles with LEP and LHC
• What is the gamma gamma resonance at 750 GeV?
• Search for photon line-like signatures from Dark Matter annihilations with H.E.S.S
• Fermi LAT Search for Dark Matter in Gamma-ray Lines and the Inclusive Photon Spectrum
• Composite Models for the 750 GeV Diphoton Excess
• Phenomenology of a 750 GeV Singlet
• Scenarii for interpretations of the LHC diphoton excess: two Higgs doublets and vector-like quarks and leptons
• Fermi LAT Search for Photon Lines from 30 to 200 GeV and Dark Matter Implications
• On the Interpretation of a Possible $\sim 750$ GeV Particle Decaying into $\gamma \gamma$
• The LHC diphoton resonance and dark matter
• The QCD Axion from Aligned Axions and Diphoton Excess
• Di-photon excess illuminates Dark Matter
• Dark matter constraints from box-shaped gamma-ray features
• The diphoton resonance as a gravity mediator of dark matter
• 750 GeV Resonance in the Dark Left-Right Model
• Model-independent combination of diphoton constraints at 750 GeV
• A 750 GeV Portal: LHC Phenomenology and Dark Matter Candidates
• 750 GeV Diphotons: Implications for Supersymmetric Unification
• Gamma-ray boxes from axion-mediated dark matter
• Experimental Considerations Motivated by the Diphoton Excess at the LHC
• 750 GeV Diphoton excess from Gauged $B-L$ Symmetry
• Diphoton Excess at 750 GeV in leptophobic U(1)${}^{\prime }$ model inspired by $E_6$ GUT
• Wide or Narrow? The Phenomenology of 750 GeV Diphotons
• Dark sector shining through 750 GeV dark Higgs boson at the LHC
• The NMSSM lives: with the 750 GeV diphoton excess
• On the sensitivity of CTA to gamma-ray boxes from multi-TeV dark matter
• PAMELA and FERMI-LAT limits on the neutralino-chargino mass degeneracy
• 750 GeV Di-photon excess at CERN LHC from a dark sector assisted scalar decay
• On the maximal diphoton width
• Diphotons from Diaxions
• A new scalar resonance at 750 GeV: Towards a proof of concept in favor of strongly interacting theories
• 750 GeV Diphotons and Supersymmetric Grand Unification
• Confronting dark matter with the diphoton excess from a parent resonance decay

Cited by in corpus (10)

• On thermal production of self-interacting dark matter
• Lepto-Quark Portal Dark Matter
• Unitary inflaton as decaying dark matter
• Indirect searches of dark matter via polynomial spectral features
• KK graviton resonance and cascade decays in warped gravity
• Learning from the New Higgs-like Scalar before It Vanishes
• Astrophysical Constraints on Singlet Scalars at LHC
• Positivity Bounds on Higgs-Portal Dark Matter
• The Selfish Higgs and Reheating
• Flux-mediated Dark Matter