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Inflation in large N limit of supersymmetric gauge theories

Research output: Contribution to journalJournal article

Published

Journal publication date9/09/2004
JournalPhysics Letters B
Journal number2
Volume597
Number of pages7
Pages222-228
Original languageEnglish

Abstract

Within supersymmetry we provide an example where the inflaton sector is derived from a gauge invariant polynomial of SU(N) or SO(N) gauge theory. Inflation in our model is driven by multi-flat directions, which assist accelerated expansion. We show that multi-flat directions can flatten the individual non-renormalizable potentials such that inflation can occur at sub-Planckian scales. We calculate the density perturbations and the spectral index, we find that the spectral index is closer to scale invariance for large N. In order to realize a successful cosmology we require large N of order, N~600.

Bibliographic note

10 pages, LaTeX2e, misprints corrected, version accepted for publishing