Right-handed sneutrino dark matter and big-bang nucleosynthesis

Details Right-handed sneutrino dark matter and big-bang nucleosynthesis Right-handed sneutrino dark matter and big-bang nucleosynthesis

2009-12-04

arxiv.org/abs/0912.0781v1

Phys.Lett.B689:163-168,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 4 figures

Scientific paper

10.1016/j.physletb.2010.04.054

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.

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