F-Term Hybrid Inflation Followed by Modular Inflation

Journal Article · Fri May 01 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3141328· OSTI ID:21308646

Pallis, C ^[1]

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1. Departamento de Fisica Aplicada, Universidad de Huelva, 21071 Huelva (Spain) and Department of Physics, University of Patras, Panepistimioupolis, GR-26500 Patras (Greece)

We consider the well motivated model of the (standard)supersymmetric(SUSY)F-term hybrid inflation(FHI) which can be realized close to the grand unification(GUT) scale. The predicted scalar spectral index n{sub s} cannot be smaller than 0.98 and can exceed unity including corrections from minimal supergravity(SUGRA), if the number of e-foldings corresponding to the pivot scale k{sub *} = 0.002/Mpc is around 50. These results are marginally consistent with the fitting of the five-year Wilkinson microwave anisotropy probe(WMAP5) data by the standard power-law cosmological model with cold dark matter and a cosmological constant, {lambda}CDM. However, n{sub s} can be reduced by restricting the number of e-foldings that k{sub *} suffered during FHI. The additional e-foldings required for solving the horizon and flatness problems can be generated by a subsequent stage of fast-roll [slow-roll]modular inflation(MI) realized by a string modulus which does [does not] acquire effective mass (m{sub s|eff}) before the onset of MI.

• OSTI ID: 21308646
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1122; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANISOTROPY
CORRECTIONS
COSMOLOGICAL CONSTANT
COSMOLOGICAL MODELS
COSMOLOGY
EFFECTIVE MASS
GENERAL RELATIVITY THEORY
GRAND UNIFIED THEORY
NONLUMINOUS MATTER
SUPERGRAVITY
SUPERSYMMETRY