Wino Dark Matter and Future dSph Observations

Abstract

We discuss the indirect detection of the wino dark matter utilizing gamma-ray observations of dwarf spheroidal galaxies (dSphs). After carefully reviewing current limits with particular attention to astrophysical uncertainties, we show prospects of the wino mass limit in future gamma-ray observation by the Fermi-LAT and the GAMMA-400 telescopes. We find that the improvement of the so-called $J$-factor of both the classical and the ultra-faint dSphs will play a crucial role to cover whole mass range of the wino dark matter. For example, with $\delta ({\log }_{10}J)=0.1$ for both the classical and the ultra-faint dSphs, whole wino dark matter mass range can be covered by 15 years and 10 years data at the Fermi-LAT and GAMMA-400 telescopes, respectively.

32 pages, 13 figures

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• Wino Dark Matter in light of the AMS-02 2015 Data
• SU(5) Grand Unification in Pure Gravity Mediation
• Cosmological constraints on dark matter annihilation and decay: Cross-correlation analysis of the extragalactic $\gamma$-ray background and cosmic shear
• Shining Primordial Black Holes
• Nambu-Goldstone Boson Hypothesis for Squarks and Sleptons in Pure Gravity Mediation
• Anomaly Mediated Gaugino Mass and Path-Integral Measure
• A keV String Axion from High Scale Supersymmetry
• Coupling Unification and Dark Matter in a Standard Model Extension with Adjoint Majorana Fermions
• Probing Bino-Gluino Coannihilation at the LHC
• Affleck-Dine baryogenesis after D-term inflation and solutions to the baryon-DM coincidence problem
• Indian Contributions to LHC Theory