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Lower bound on the neutralino mass from new data on CMB and implications for relic neutralinos
2003
Physical Review D, Particles and fields
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In the frame of an effective MSSM model without gaugino-mass unification at a grand unification (GUT) scale, we set a lower bound on the neutralino mass based on the new WMAP data on Ω_CDM. Our lower bound, m_χ 6 GeV, leaves much room for relic neutralinos significantly lighter than those commonly considered (m_χ 50 GeV). We prove that these light neutralinos may produce measurable effects in WIMP direct detection experiments of low energy threshold and large exposure.
doi:10.1103/physrevd.68.043506
fatcat:agqbmmaozralpderlui7ov6i6e