New Constraints on Isospin-Violating Dark Matter

Abstract

We derive bounds on the dark matter annihilation cross-section for low-mass (5-20 GeV) dark matter annihilating primarily to up or down quarks, using the Fermi-LAT bound on gamma-rays from Milky Way satellites. For models in which dark matter-Standard Model interactions are mediated by particular contact operators, we show that these bounds can be directly translated into bounds on the dark matter-proton scattering cross-section. For isospin-violating dark matter, these constraints are tight enough to begin to constrain the parameter-space consistent with experimental signals of low-mass dark matter. We discuss possible models that can evade these bounds.

6 pages, 2 figures, LaTeX, some clarifications and minor errors corrected, citations added

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Cited by in corpus (16)

• Galactic Searches for Dark Matter
• Unitarity and Monojet Bounds on Models for DAMA, CoGeNT, and CRESST-II
• Matrix element analyses of dark matter scattering and annihilation
• Xenophobic Dark Matter
• Tools for Studying Low-Mass Dark Matter at Neutrino Detectors
• Light mediators in dark matter direct detections
• Isospin-violating dark matter in the light of recent data
• Implications of the latest XENON100 and cosmic ray antiproton data for isospin violating dark matter
• Complementary Constraints on Light Dark Matter from Heavy Quarkonium Decays
• Isospin violating dark matter being asymmetric
• A combined analysis of PandaX, LUX, and XENON1T experiments within the framework of dark matter effective theory
• Asymmetric Dark Matter
• The Sun and stars: Giving light to dark matter
• Direct and indirect constraints on isospin-violating dark matter
• Isospin-Violating Dark Matter Benchmarks for Snowmass 2013
• Probing Isospin-Violating Dark Matter