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arXiv · 0902.2510

A Sneutrino NLSP in the $ν$CMSSM

Kenji Kadota·Keith A. Olive·Liliana Velasco-Sevilla
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Abstract

We extend the constrained minimal supersymmetric model (CMSSM) by adding a right-handed neutrino superfield ($ν$CMSSM) which decouples close to the GUT scale. We study the effects of a right-handed neutrino on the low energy spectrum and focus on the predictions for dark matter properties. We pay particular attention to the realization of the light (left-handed) sneutrino which can be the next-to-lightest supersymmetric particle (NLSP) with either the neutralino or gravitino as the lightest supersymmetric particle (LSP). Notably, for the case of a neutralino LSP with a sneutrino NLSP, there are new `sneutrino coannihilation regions' which yield the desired thermal neutralino relic density determined by WMAP.

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Kenji Kadota, Keith A. Olive, Liliana Velasco-Sevilla. 2009-03-21. A Sneutrino NLSP in the $ν$CMSSM. https://doi.org/10.1103/physrevd.79.055018

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