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The SUSY hybrid inflation model is found to dissipate radiation during theinflationary period. Analysis is made of parameter regimes in which thesedissipative effects are significant. The scalar spectral index, its running,and the tensor-scalar ratio are computed in the entire parameter range of themodel. A clear prediction for strong dissipative warm inflation is found forn_S-1 \simeq 0.98 and a low tensor-scalar ratio much below 10^{-6}. The strongdissipative warm inflation regime also is found to have no \eta-problem andwith the field amplitude much below the Planck scale. As will be discussed,this has important theoretical implications in permitting a much wider varietyof SUGRA extensions to the basic model.Comment: paragraph added at the end of section V; references added; accepted  for publication in Phys. Rev.

Determining the regimes of cold and warm inflation in the supersymmetric hybrid model