Journal
PHYSICAL REVIEW D
Volume 65, Issue 10, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevD.65.103508
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The standard calculation of the spectrum of density perturbations produced during inflation assumes (i) parallel ton-1parallel to<1 and (ii) parallel todn/d ln kparallel toP, spectral index n, and running of the spectral index dn/d ln k, assuming only (i) and not (ii). I give a large class of observationally viable examples in which these general slow-roll formulas are accurate but the standard slow-roll formulas for the spectral index and running are incorrect.
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