Right-handed sneutrino dark matter and big-bang nucleosynthesis

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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. © 2010 Elsevier B.V. All rights reserved.

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Ishiwata, K., Kawasaki, M., Kohri, K., & Moroi, T. (2010). Right-handed sneutrino dark matter and big-bang nucleosynthesis. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 689(4–5), 163–168. https://doi.org/10.1016/j.physletb.2010.04.054

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