Abstract

Very light right-handed (RH) sneutrinos in the Next-to-Minimal Supersymmetric Standard Model can be viable candidates for cold dark matter. Very light RH sneutrinos can annihilate into either a fermion-antifermion pair, very light pseudo scalars or RH neutrinos. We investigate the prospects for their direct detection and the implications for Higgs phenomenology for each cases. We also calculate the gamma ray flux from RH sneutrino annihilation in the Galactic center.

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