Precision predictions for the primordial power spectra of scalar potential models of inflation

D. J. Brooker, N. C. Tsamis, and R. P. Woodard
Phys. Rev. D 93, 043503 – Published 4 February 2016

Abstract

We exploit a new numerical technique for evaluating the tree order contributions to the primordial scalar and tensor power spectra for scalar potential models of inflation. Among other things we use the formalism to develop a good analytic approximation which goes beyond generalized slow roll expansions in that (1) it is not contaminated by the physically irrelevant phase, (2) its 0th order term is exact for the constant first slow roll parameter, and (3) the correction is multiplicative rather than additive. These features allow our formalism to capture at first order effects which are higher order in other expansions. Although this accuracy is not necessary to compare current data with any specific model, our method has a number of applications owing to the simpler representation it provides for the connection between the power spectra and the expansion history of a general model.

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  • Received 28 July 2015

DOI:https://doi.org/10.1103/PhysRevD.93.043503

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

D. J. Brooker1,*, N. C. Tsamis2,†, and R. P. Woodard1,‡

  • 1Department of Physics, University of Florida, Gainesville, Florida 32611, USA
  • 2Department of Physics, Institute of Theoretical Physics & Computational Physics, University of Crete, GR-710 03 Heraklion, Greece

  • *djbrooker@ufl.edu
  • tsamis@physics.uoc.gr
  • woodard@phys.ufl.edu

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Vol. 93, Iss. 4 — 15 February 2016

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