Simplified Dark Matter Models for the Galactic Center Gamma-Ray Excess

Abstract

Motivated by the gamma-ray excess observed from the region surrounding the Galactic Center, we explore particle dark matter models that could potentially account for the spectrum and normalization of this signal. Taking a model-independent approach, we consider an exhaustive list of tree-level diagrams for dark matter annihilation, and determine which could account for the observed gamma-ray emission while simultaneously predicting a thermal relic abundance equal to the measured cosmological dark matter density. We identify a wide variety of models that can meet these criteria without conflicting with existing constraints from direct detection experiments or the Large Hadron Collider (LHC). The prospects for detection in near future dark matter experiments and/or the upcoming 14 TeV LHC appear quite promising.

36 pages (20 are appendices); v4: some minor corrections in formulas in appendices, conclusions unchanged

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Cited by in corpus (49)

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• Toward (Finally!) Ruling Out Z and Higgs Mediated Dark Matter Models
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• Fitting the Galactic Center Gamma-Ray Excess with Cascade Annihilations
• Flavored Dark Matter and the Galactic Center Gamma-Ray Excess
• Higgs portal vector dark matter for $\mathrm{GeV}$ scale $\gamma$-ray excess from galactic center
• The Effective Hooperon
• A weighty interpretation of the Galactic Centre excess
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• Robust collider limits on heavy-mediator Dark Matter
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• Multi-Step Cascade Annihilations of Dark Matter and the Galactic Center Excess
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• Z-portal dark matter
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• Two new catalogs of blazar candidates in the WISE infrared sky
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• Z' Mediated Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Supersymmetric Sub-Electroweak Scale Dark Matter, the Galactic Center Gamma-ray Excess, and Exotic Decays of the 125 GeV Higgs Boson
• The Gamma-Ray Pulsar Population of Globular Clusters: Implications for the GeV Excess
• Nonthermal Two Component Dark Matter Model for Fermi-LAT $\gamma$-ray excess and 3.55 keV X-ray Line
• Towards a Supersymmetric Description of the Fermi Galactic Center Excess
• Class of Higgs-portal Dark Matter models in the light of gamma-ray excess from Galactic center
• Common Origin of Neutrino Mass and Dark Matter from Anomaly Cancellation Requirements of a $U(1{)}_{B-L}$ Model
• Annihilating Asymmetric Dark Matter
• Multi-Component Dark Matter in a Non-Abelian Dark Sector
• NMSSM explanations of the Galactic center gamma ray excess and promising LHC searches
• Vector Fermion-Portal Dark Matter: Direct Detection and Galactic Center Gamma-Ray Excess
• The interpretation for Galactic Center Excess and Electroweak Phase Transition in the NMSSM
• Galactic Center Gamma-Ray Excess through a Dark Shower
• $SU(2{)}_X$ Vector DM and Galactic Center Gamma-Ray Excess
• Simplified Dark Matter Models Confront the Gamma Ray Excess
• Confronting the Galactic Center Gamma Ray Excess With a Light Scalar Dark Matter
• Two-portal Dark Matter
• Ruling out $\sim 100-300$ GeV thermal relic annihilating dark matter by radio observation of the Andromeda galaxy
• Searches for dark matter signals in simplified models at future hadron colliders
• Point Sources from Dissipative Dark Matter
• On Anomaly-Free Dark Matter Models
• Tau Portal Dark Matter models at the LHC
• Thick Branes in Extra Dimensions and Suppressed Dark Couplings
• Interpreting the galactic center gamma-ray excess in the NMSSM
• Low Energy Gamma Ray Excess Confronting a Singlet Scalar Extended Inert Doublet Dark Matter Model
• Dark Matter phenomenology : from simplified WIMP models to refined alternative solutions
• Search for Higgs-like particles produced in association with bottom quarks in proton-antiproton collisions
• Dark matter properties implied by gamma ray interstellar emission models