Abstract
We study candidates for dark matter in a minimal flipped SU(5)×U(1) supersymmetric GUT. Since the model has no R-parity, spin- 1 2 supersymmetric partners of conventional particles mix with other neutral fermions including neutrinos, and can decay into them. The lightest particle which is predominantly a gaugino/higgsino mixture decays with a lifetime τχ∼1-109 s. The model contains a scalar "flaton" field whose coherent oscillations decay before cosmological nucleosynthesis, and whose pseudoscalar partner contributes negligibly to Ω if it is light enough to survive to the present epoch. The fermionic "flatino" partner of the flaton has a lifetime τΦ∼1028-1034 yr and is a viable candidate for metastable dark matter with Ω≲1.
Original language | English (US) |
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Pages (from-to) | 283-288 |
Number of pages | 6 |
Journal | Physics Letters B |
Volume | 209 |
Issue number | 2-3 |
DOIs | |
State | Published - Aug 4 1988 |