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

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

2007-09-27

arxiv.org/abs/0709.4477v1

JHEP 0711:029,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

72 pages, 50 figures. The version on the archive has low-resolution figures. The paper with high resolution figures may be fou

Scientific paper

10.1088/1126-6708/2007/11/029

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.

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