Messenger sneutrinos as cold dark matter

Details Messenger sneutrinos as cold dark matter Messenger sneutrinos as cold dark matter

1997-08-06

arxiv.org/abs/hep-ph/9708264v1

Phys.Lett. B415 (1997) 161-169

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 2 figures, postscript file available via anonymous ftp://ucdhep.ucdavis.edu/han/dm/dm.ps

Scientific paper

10.1016/S0370-2693(97)01205-7

In models where supersymmetry breaking is communicated into the visible sector via gauge interactions the lightest supersymmetric particle is typically the gravitino which is too light to account for cold dark matter. We point out that the lightest messenger sneutrinos with mass in the range of one to three TeV may serve as cold dark matter over most of the parameter space due to one-loop electroweak radiative corrections. However, in the minimal model this mass range has been excluded by the direct dark matter searches. We propose a solution to this problem by introducing terms that explicitly violate the messenger number. This results in low detection rate for both direct and indirect searches and allows messenger sneutrinos to be a valid dark matter candidate in a wide region of SUSY parameter space.

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