We derive the allowed mass range for the superlight gravitino present in a large class of supersymmetric models from the observed neutrino luminosity from Supernova 1987A. We find that for photino masses of order of 100 GeV, the mass range 2.6 × 10-8 eV ≤ mg̃ ≤ 2.2 × 10-6 eV for the gravitino g̃ is excluded by SN1987A observations. Unlike the bounds on mg̃ from nucleosynthesis, the bounds in the present paper do not depend critically upon the uncertainties of the observational input. © 1997 Elsevier Science B.V.
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 29 May 1997|