Wino dark matter under siege

By T. Cohen, M. Lisanti, A. Pierce, T. Slatyer. 2013

228 citations recorded by the source corpus.

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.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9b364faaeef3655807769262caf5d4e6e90e7a40

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Citations in the corpus

Lectures on Dark Matter Physics (2016, background): “The wino is a supersymmetric DM candidate that provides a classic example of a twostate system where Sommerfeld enhancement plays an integral role [29, 102].”
Higgs mass and unnatural supersymmetry (2014, background): “Current bounds from gamma rays are already rather constraining [73, 74], although very dependent on the assumptions on the halo profiles.”
Physics opportunities of a 100 TeV proton–proton collider (2015, background): “A 3 TeV wino making up all the dark matter is excluded for a standard NFW dark matter distribution, though it is allowed for more “cored” profiles [63, 64, 65, 66, 67].”
Cosmological Moduli and the Post-Inflationary Universe: A Critical Review (2015, methodology): “On the other hand, candidates like Winos and Higgsinos with large annihilation cross section are now severely bounded by a combination of continuum and line searches from FERMI data [61, 62].”
In wino veritas? Indirect searches shed light on neutralino dark matter (2013, unknown): “[35], to which our work is complementary.”
Non-Abelian dark matter and dark radiation (2015, background): “The “wino” model has been investigated recently [31–35], and is strongly disfavored by H.”