Right-handed sneutrino dark matter and big-bang nucleosynthesis
arXiv:0912.0781 · doi:10.1016/j.physletb.2010.04.054
Abstract
We study the light-element abundances in supersymmetric model where the right-handed sneutrino is the lightest superparticle (LSP), assuming that the neutrino masses are purely Dirac-type. In such a scenario, the lightest superparticle in the minimal supersymmetric standard model sector (which we call MSSM-LSP) becomes long-lived, and thermal relic MSSM-LSP may decay after the big-bang nucleosynthesis starts. We calculate the light-element abundances including non-standard nuclear reactions induced by the MSSM-LSP decay, and derive constraints on the scenario of right-handed sneutrino LSP.
13 pages, 4 figures
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- Signatures of sneutrino dark matter in an extension of the CMSSM
- Resonant slepton production and right sneutrino dark matter in left-right supersymmetry
- Revisiting (s)neutrino dark matter in natural SUSY
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- Gamma-ray signals from multicomponent scalar dark matter decays
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- Right-handed sneutrino and gravitino multicomponent dark matter in light of neutrino detectors