Hidden Sector Dark Matter Models for the Galactic Center Gamma-Ray Excess

Abstract

The gamma-ray excess observed from the Galactic Center can be interpreted as dark matter particles annihilating into Standard Model fermions with a cross section near that expected for a thermal relic. Although many particle physics models have been shown to be able to account for this signal, the fact that this particle has not yet been observed in direct detection experiments somewhat restricts the nature of its interactions. One way to suppress the dark matter's elastic scattering cross section with nuclei is to consider models in which the dark matter is part of a hidden sector. In such models, the dark matter can annihilate into other hidden sector particles, which then decay into Standard Model fermions through a small degree of mixing with the photon, Z, or Higgs bosons. After discussing the gamma-ray signal from hidden sector dark matter in general terms, we consider two concrete realizations: a hidden photon model in which the dark matter annihilates into a pair of vector gauge bosons that decay through kinetic mixing with the photon, and a scenario within the generalized NMSSM in which the dark matter is a singlino-like neutralino that annihilates into a pair of singlet Higgs bosons, which decay through their mixing with the Higgs bosons of the MSSM.

11 pages, 8 figures; v2: added discussion of AMS positron constraints; v3: matches journal version

References in corpus (14)

• A Theory of Dark Matter
• Secluded WIMP Dark Matter
• Precise Relic WIMP Abundance and its Impact on Searches for Dark Matter Annihilation
• Exciting Dark Matter and the INTEGRAL/SPI 511 keV signal
• Non-Abelian Dark Sectors and Their Collider Signatures
• Simplified Dark Matter Models for the Galactic Center Gamma-Ray Excess
• Dark Matter Signals from Cascade Annihilations
• The generalised NMSSM at one loop: fine tuning and phenomenology
• High Energy Positrons and the WMAP Haze from Exciting Dark Matter
• Light Dark Matter from the U(1)_X Sector in the NMSSM with Gauge Mediation
• Particle Physics Implications for CoGeNT, DAMA, and Fermi
• Extended MSSM Neutralinos as the Source of the PAMELA Positron Excess
• Dark matter annihilation through a lepton-specific Higgs boson
• The Galactic Center Region Gamma Ray Excess from A Supersymmetric Leptophilic Higgs Model

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• Supersymmetric Sub-Electroweak Scale Dark Matter, the Galactic Center Gamma-ray Excess, and Exotic Decays of the 125 GeV Higgs Boson
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• SUSY explanation of the Fermi Galactic Center Excess and its test at LHC Run-II
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• Galactic Centre GeV Photons from Dark Technicolor
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• SUSY Implications from WIMP Annihilation into Scalars at the Galactic Centre
• Dark Forces in the Sky: Signals from Z' and the Dark Higgs
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• The Semi-Hooperon: Gamma-ray and anti-proton excesses in the Galactic Center
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• Dark Matter Microhalos in the Solar Neighborhood: Pulsar Timing Signatures of Early Matter Domination
• Can AMS-02 discriminate the origin of an anti-proton signal?
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• The Effects Of Relativistic Hidden Sector Particles on the Matter Power Spectrum
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• Quantum Simulations of Dark Sector Showers
• Present and Future constraints on Secluded Dark Matter in the Galactic Halo with TeV Gamma-ray Observatories
• The Cherenkov Telescope Array Will Test Whether Pulsars Generate the Galactic Center Gamma-Ray Excess
• Limits on Early Matter Domination from the Isotropic Gamma-Ray Background
• Dark matter properties implied by gamma ray interstellar emission models
• Boosting (In)direct Detection of Dark Matter
• Shedding Light on Dark Matter at the LHC with Machine Learning
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