Supersymmetric relics from the big bang

Details Supersymmetric relics from the big bang Supersymmetric relics from the big bang

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nuphb.238..453e&link_type=abstract

Nuclear Physics B, Volume 238, Issue 2, p. 453-476.

Physics

Nuclear Physics

880

Scientific paper

We consider the cosmological constraints on supersymmetric theories with a new, stable particle. Circumstantial evidence points to a neutral gauge/Higgs fermion as the best candidate for this particle, and we derive bounds on the parameters in the lagrangian which govern its mass and couplings. One favored possibility is that the lightest neutral supersymmetric particle is predominantly a photino ~γ with mass above 1/2 GeV, while another is that the lightest neutral supersymmetric particle is a Higgs fermion with mass above 5 GeV or less than O(100) eV. We also point out that a gravitino mass of 10 to 100 GeV implies that the temperature after completion of an inflationary phase cannot be above 1014 GeV, and probably not above 3 × 1012 GeV. This imposes constraints on mechanisms for generating the baryon number of the universe.

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