1. The observational status of simple inationary models: an update.
- Author
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OKADA, Nobuchika, ŞENOĞUZ, Vedat Nefer, and SHAFI, Qaisar
- Subjects
ASTRONOMICAL observations ,ASTRONOMICAL models ,STANDARD model (Nuclear physics) ,SCALAR field theory ,FERMIONS - Abstract
We provide an update on five relatively well-motivated inflationary models in which the inflaton is a Standard Model singlet scalar field. These include i) the textbook quadratic and quartic potential models but with additional couplings of the inflaton to fermions and bosons, which enable reheating and also modify the naive predictions for the scalar spectral index n
s and r, ii) models with Higgs and Coleman-Weinberg potentials, and finally iii) a quartic potential model with nonminimal coupling of the inflaton to gravity. For ns values close to 0.96, as determined by the WMAP9 and Planck experiments, most of the considered models predict r ≥ 0.02r ≥ 0.02. The running of the scalar spectral index, quantified by |dns /dlnk|, is predicted in these models to be of order 10-4 10-3 . [ABSTRACT FROM AUTHOR]- Published
- 2016
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