BLUE PERTURBATION SPECTRA FROM HYBRID INFLATION WITH CANONICAL SUPERGRAVITY

We construct a hybrid inflationary model associated with the superheav y scale M-X similar to-10(16) GeV of supersymmetric grand unified theo ries in which the inflaton potential is provided entirely by canonical supergravity. We find that the spectrum of adiabatic density perturba tions is characterized by a strongly varying spectral index which is c onsiderably lar er than unity. Moreover, the total number of e-folding s is very limited. Implications of our analysis for other hybrid infla tionary scenarios are briefly discussed.