Wino dark matter under siege

Timothy Cohen, Mariangela Lisanti, Aaron Pierce, Tracy R. Slatyer

Research output: Contribution to journalArticle

134 Scopus citations

Abstract

A fermion triplet of SU(2)L - a wino - is a well-motivated dark matter candidate. This work shows that present-day wino annihilations are constrained by indirect detection experiments, with the strongest limits coming from H.E.S.S. and Fermi. The bounds on wino dark matter are presented as a function of mass for two scenarios: thermal (winos constitute a subdominant component of the dark matter for masses less than 3.1 TeV) and non-thermal (winos comprise all the dark matter). Assuming the NFW halo model, the H.E.S.S. search for gamma-ray lines excludes the 3.1 TeV thermal wino; the combined H.E.S.S. and Fermi results completely exclude the non-thermal scenario. Uncertainties in the exclusions are explored. Indirect detection may provide the only probe for models of anomaly plus gravity mediation where the wino is the lightest superpartner and scalars reside at the 100 TeV scale.

Original languageEnglish (US)
Article number061
JournalJournal of Cosmology and Astroparticle Physics
Volume2013
Issue number10
DOIs
StatePublished - Oct 1 2013

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

Keywords

  • dark matter experiments
  • dark matter theory
  • supersymmetry and cosmology

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