Connecting the LHC diphoton excess to the Galatic center gamma-ray excess

Abstract

The recent LHC Run-2 data have shown a possible excess in diphoton events, suggesting the existence of a new resonance $\varphi$ with mass $M\sim 750$~GeV. If $\varphi$ plays the role of a portal particle connecting the Standard Model and the invisible dark sector, the diphoton excess should be correlated with another photon excess, namely, the excess in the diffuse gamma rays towards the Galactic center, which can be interpreted by the annihilation of dark matter(DM). We investigate the necessary conditions for a consistent explanation for the two photon excesses, especially the requirement on the width-to-mass ratio $\Gamma /M$ and $\varphi$ decay channels, in a collection of DM models where the DM particle can be scalar, fermionionic and vector, and $\varphi$ can be generated through $s$-channel $gg$ fusion or $q\bar{q}$ annihilation. We show that the minimally required $\Gamma /M$ is determined by a single parameter proportional to $(m_{\chi }/M{)}^n$, where the integer $n$ depends on the nature of the DM particle. We find that for the scalar DM model with $\varphi$ generated from $q\bar{q}$ annihilation, the minimally required $\Gamma /M$ can be as low as $\mathcal{O}(10^{-3})$. For the scalar DM model with $\varphi$ generated from $gg$ fusion and fermionic DM model with $\varphi$ from $q\bar{q}$ annihilation, the required $\Gamma /M$ are typically of $\mathcal{O}(10^{-2})$. The vector DM models, however, require very large $\Gamma /M$ of order one. For the DM models which can consistently explain both the excesses,the predicted cross sections for gamma-ray line are typically of $\mathcal{O}(10^{-31}-10^{-29}){\text{cm}}^3{\text{s}}^{-1}$, which are close to the current limits from the Fermi-LAT experiment.

arXiv comment30 pages, 7 figures, references added

References in corpus (90)

• A Universal Density Profile from Hierarchical Clustering
• A Brief Introduction to PYTHIA 8.1
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• Dark Matter Annihilation in The Galactic Center As Seen by the Fermi Gamma Ray Space Telescope
• On The Origin Of The Gamma Rays From The Galactic Center
• The Characterization of the Gamma-Ray Signal from the Central Milky Way: A Compelling Case for Annihilating Dark Matter
• Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission
• Background model systematics for the Fermi GeV excess
• Dark Matter and Pulsar Model Constraints from Galactic Center Fermi-LAT Gamma Ray Observations
• Fermi-LAT Observations of High-Energy Gamma-Ray Emission Toward the Galactic Center
• Astrophysical and Dark Matter Interpretations of Extended Gamma-Ray Emission from the Galactic Center
• Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX data
• Search for high-mass dilepton resonances in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• Strong support for the millisecond pulsar origin of the Galactic center GeV excess
• 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
• A Tale of Tails: Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics
• Beyond the Minimal Composite Higgs Model
• What is the gamma gamma resonance at 750 GeV?
• Evidence for Unresolved Gamma-Ray Point Sources in the Inner Galaxy
• Search for an additional, heavy Higgs boson in the $H\to ZZ$ decay channel at $\sqrt{s}$ = 8 TeV in $pp$ collision data with the ATLAS detector
• Possible Evidence For Dark Matter Annihilation In The Inner Milky Way From The Fermi Gamma Ray Space Telescope
• The Consistency of Fermi-LAT Observations of the Galactic Center with a Millisecond Pulsar Population in the Central Stellar Cluster
• Phenomenology of a 750 GeV Singlet
• Scenarii for interpretations of the LHC diphoton excess: two Higgs doublets and vector-like quarks and leptons
• Search for a Higgs boson in the mass range from 145 to 1000 GeV decaying to a pair of W or Z bosons
• Dynamics of Perturbations in Double Field Theory & Non-Relativistic String Theory
• A comment on the emission from the Galactic Center as seen by the Fermi telescope
• On the Interpretation of a Possible $\sim 750$ GeV Particle Decaying into $\gamma \gamma$
• GeV excess in the Milky Way: The Role of Diffuse Galactic gamma ray Emission template
• Dark matter annihilations and decays after the AMS-02 positron measurements
• The LHC diphoton resonance and dark matter
• Di-photon excess illuminates Dark Matter
• Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• A pseudoscalar decaying to photon pairs in the early LHC Run 2 data
• Search for high-mass diphoton resonances in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• WIMPs at the Galactic Center
• First interpretation of the 750 GeV di-photon resonance at the LHC
• The diphoton resonance as a gravity mediator of dark matter
• Knocking on New Physics' door with a Scalar Resonance
• The Contribution of Cosmic Rays Interacting With Molecular Clouds to the Galactic Center Gamma-Ray Excess
• A 750 GeV Dark Pion: Cousin of a Dark G-parity-odd WIMP
• Search for a high-mass Higgs boson decaying to a $W$ boson pair in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Quark Seesaw, Vectorlike Fermions and Diphoton Excess
• Search for vector-like charge 2/3 T quarks in proton-proton collisions at sqrt(s) = 8 TeV
• A hidden confining world on the 750 GeV diphoton excess
• A Boost Test of Anomalous Diphoton Resonance at the LHC
• Implication of the 750 GeV diphoton resonance on two-Higgs-doublet model and its extensions with Higgs field
• Interpreting the 750 GeV diphoton excess by the singlet extension of the Manohar-Wise Model
• What Does The PAMELA Antiproton Spectrum Tell Us About Dark Matter?
• Flavor Anomalies, the Diphoton Excess and a Dark Matter Candidate
• Asymmetric Dark Matter in the Sun and the Diphoton Excess at the LHC
• Gauged Two Higgs Doublet Model confronts the LHC 750 GeV di-photon anomaly
• 750 GeV Resonance in the Dark Left-Right Model
• What if Dark Matter Gamma-Ray Lines come with Gluon Lines?
• Interpreting $750$ GeV Diphoton Excess with R-parity Violating Supersymmetry
• The 750 GeV diphoton excess at the LHC and dark matter constraints
• Search for neutral MSSM Higgs bosons decaying into a pair of bottom quarks
• 750 GeV Diphoton Resonance, 125 GeV Higgs and Muon g-2 Anomaly in Deflected Anomaly Mediation SUSY Breaking Scenario
• Implications of the first AMS-02 measurement for dark matter annihilation and decay
• Di-photon Excess Explained by a Resonant Sneutrino in R-parity Violating Supersymmetry
• The LHC 750 GeV diphoton excess in supersymmetry with gauged baryon and lepton numbers
• Interpreting the 750 GeV diphoton excess in minimal extensions of Two-Higgs-Doublet models
• Towards a realistic astrophysical interpretation of the gamma-ray Galactic center excess
• A 750 GeV Portal: LHC Phenomenology and Dark Matter Candidates
• The 750 GeV diphoton excess and its explanation in 2-Higgs Doublet Models with a real inert scalar multiplet
• Squarkonium, diquarkonium and octetonium at the LHC and their di-photon decays
• A 750 GeV Messenger of Dark Conformal Symmetry Breaking
• The Diphoton Excess, Low Energy Theorem and the 331 Model
• A critical reassessment of particle Dark Matter limits from dwarf satellites
• Cosmic ray propagation and dark matter in light of the latest AMS-02 data
• An extension of two-Higgs-doublet model and the excesses of 750 GeV diphoton, muon g-2 and $h\to \mu \tau$
• Explaining 750 GeV diphoton excess from top/bottom partner cascade decay in two-Higgs-doublet model extension
• Upper limits on DM annihilation cross sections from the first AMS-02 antiproton data
• A 750 GeV dark matter messenger at the Galactic Center
• Experimental Considerations Motivated by the Diphoton Excess at the LHC
• Realizing Dark Matter and Higgs Inflation in Light of LHC Diphoton Excess
• Fermi Bubbles under Dark Matter Scrutiny. Part I: Astrophysical Analysis
• Subdominant Left-Right Scalar Dark Matter as Origin of the 750 GeV Di-photon Excess at LHC
• Minimal Left-Right Symmetry Confronted with the 750 GeV Di-photon Excess at LHC
• Left-right asymmetry and 750 GeV diphoton excess
• One jet to rule them all: monojet constraints and invisible decays of a 750 GeV diphoton resonance
• Gauge-singlet dark matter in a left-right symmetric model with spontaneous CP violation
• Exploration of decaying dark matter in a left-right symmetric model
• Implications of the latest XENON100 and cosmic ray antiproton data for isospin violating dark matter
• Two Higgs Bi-doublet Left-Right Model With Spontaneous P and CP Violation
• Di-photon excess at LHC and the gamma ray excess at the Galactic Centre
• 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
• Searching for Dark Matter Signals in the Left-Right Symmetric Gauge Model with CP Symmetry
• Scalar resonance at 750 GeV as composite of heavy vector-like fermions

Cited by in corpus (1)

• Interpreting the 750 GeV digamma excess: a review