Red spectral tilt and observable gravity waves in shifted hybrid inflation

2011/04/20 by Matthew Civiletti, Mansoor Ur Rehman, Qaisar Shafi +1
Physics and Astronomy · #Black Holes and Theoretical Physics #CMB cold spot #Cosmic microwave background #Cosmology and Gravitation Theories #Geometry #Inflation (cosmology) #Mathematical physics #Observable #Particle physics #Particle physics theoretical and experimental studies #Physics #Planck #Quantum mechanics #Scalar (mathematics) #Spectral index #Spectral line #Supergravity #Supersymmetry #Theoretical physics #astro-ph.CO #gr-qc #hep-ph

paper · pdf · doi:10.1103/physrevd.84.103505

22 pages, 4 figures, and 1 table

arxiv created 2011/04/20 · openalex publication_date 2011/11/02 · arxiv updated 2015/03/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We consider supersymmetric shifted hybrid inflation models with a red-tilted scalar spectral index n_s in agreement with the WMAP 7-yr central value. If nonminimal supergravity corrections are included, these models can also support a tensor-to-scalar ratio as large as r\ensuremath≃0.02, which may be observable by the Planck Satellite. In contrast to the standard supersymmetric hybrid inflation scenario, topological defects produced via gauge symmetry breaking are inflated away in the shifted version of the theory.

Citations

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