TY - JOUR
T1 - Sneutrino NLSP in the νcMSSM
AU - Kadota, Kenji
AU - Olive, Keith A.
AU - Velasco-Sevilla, Liliana
PY - 2009/3/2
Y1 - 2009/3/2
N2 - We extend the constrained minimal supersymmetric model (CMSSM) by adding a right-handed neutrino superfield (νCMSSM) 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.
AB - We extend the constrained minimal supersymmetric model (CMSSM) by adding a right-handed neutrino superfield (νCMSSM) 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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U2 - 10.1103/PhysRevD.79.055018
DO - 10.1103/PhysRevD.79.055018
M3 - Article
AN - SCOPUS:64849109223
SN - 1550-7998
VL - 79
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 5
M1 - 055018
ER -