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hep-ph/9810257
IC/98/163
WIS-98/25/Oct-DPP
Naturally Light Sterile Neutrinos in
Gauge Mediated Sup ersymmetry Breaking
a b
Gia Dvali and Yosef Nir
a
ICTP, Trieste, 34100, Italy
b
Department of Particle Physics, Weizmann Institute of Science, Rehovot 76100, Israel
Mo duli are generic in string (M) theory. In a large class of gauge-mediated
Sup ersymmetry breaking mo dels, the fermionic comp onents of such elds
havevery light masses, around the eV scale, and non-negligible mixing with