A SIGNATURE OF INFLATION FROM DYNAMICAL SUPERSYMMETRY BREAKING

In models of cosmological inflation motivated by dynamical supersymmet ry breaking, the potential driving inflation is characterized by inver se powers of a scalar field. These models produce observables similar to those typical of the hybrid inflation scenario: negligible producti on of tensor (gravitational wave) modes, and a blue scalar spectral in dex. In this short note, we show that, unlike standard hybrid inflatio n models, dynamical supersymmetric inflation (DSI) predicts a mensurab le deviation from a power-law spectrum of fluctuations, with a variati on in the scalar spectral index \dn/d(ln l)\ may be as large as 0.05. DSI can be observationally distinguished from other hybrid models with cosmic microwave background measurements of the planned sensitivity o f the ESA's Planck Surveyor. (C) 1998 Elsevier Science B.V. All rights reserved.