Indirect Detection Analysis: Wino Dark Matter Case Study

Abstract

We perform a multichannel analysis of the indirect signals for the Wino Dark Matter, including one-loop electroweak and Sommerfeld enhancement corrections. We derive limits from cosmic ray antiprotons and positrons, from continuum galactic and extragalactic diffuse gamma-ray spectra, from the absence of gamma-ray line features at the galactic center above 500 GeV in energy, from gamma-rays toward nearby dwarf spheroidal galaxies and galaxy clusters, and from CMB power-spectra. Additionally, we show the future prospects for neutrino observations toward the inner Galaxy and from antideuteron searches. For each of these indirect detection probes we include and discuss the relevance of the most important astrophysical uncertainties that can impact the strength of the derived limits. We find that the Wino as a dark matter candidate is excluded in the mass range bellow ~800 GeV from antiprotons and between 1.8 and 3.5 TeV from the absence of a gamma-ray line feature toward the galactic center. Limits from other indirect detection probes confirm the main bulk of the excluded mass ranges.

38 pages, 17 figures, 4 tables; minor corrections, fig. 17 added discussing the dependence of the limits on the Wino contribution to the whole DM, matches the published version

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