Sneutrino cold dark matter, a new analysis: Relic abundance and detection rates

By C. Arina, N. Fornengo. 2007

154 citations recorded by the source corpus.

We perform a new and updated analysis of sneutrinos as dark matter candidates, in different classes of supersymmetric models. We extend previous analyses by studying sneutrino phenomenology for full variations of the supersymmetric parameters which define the various models. We first revisit the standard Minimal Supersymmetric Standard Model, concluding that sneutrinos are marginally compatible with existing experimental bounds, including direct detection, provided they compose a subdominant component of dark matter. We then study supersymmetric models with the inclusion of right-handed fields and lepton-number violating terms. Simple versions of the lepton-number-violating models do not lead to phenomenology different from the standard case when the neutrino mass bounds are properly included. On the contrary, models with right-handed fields are perfectly viable: they predict sneutrinos which are compatible with the current direct detection sensitivities, both as subdominant and dominant dark matter components. We also study the indirect detection signals for such successful models: predictions for antiproton, antideuteron and gamma-ray fluxes are provided and compared with existing and future experimental sensitivities. The neutrino flux from the center of the Earth is also analyzed.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f292918b85ef8d41a3b08fe4cdcfb938de3223c9

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In Nuclear and High Energy Physics

Citations in the corpus

Dark Matter Candidates from Particle Physics and Methods of Detection (2010, background): “The sneutrinos are not good dark matter candidates, as both their their annihilation and scattering cross sections are large, and so they are under-abundant or excluded by null results from direct detection experiments for all masses near mweak (37; 38).”
Dark matter direct detection with non-Maxwellian velocity structure (2009, background): “ajorana components of a massive pseudo-Dirac fermion, or between the real and imaginary components of a complex scalar. Simple models can be constructed where the mediating interaction is the Z-boson [7, 8, 57, 41]. Models with new vector interactions to explain the PAMELA positron excess also natur”