Chaotic hybrid new inflation in supergravity with a running spectral index

2003/07/31 by Masahide Yamaguchi, Jun’ichi Yokoyama, Jun'ichi Yokoyama · 6 citations
Earth and Planetary Sciences · Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Geophysics and Gravity Measurements #astro-ph #hep-ph

paper · pdf · doi:10.1103/physrevd.68.123520

published as Phys.Rev. D68 (2003) 123520 · 15 pages, to appear in Phys. Rev. D

arxiv created 2003/11/07 · openalex publication_date 2003/12/23 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We propose an inflation model in supergravity, in which chaotic and hybrid inflation occurs successively, followed by new inflation. During hybrid inflation, adiabatic fluctuations with a running spectral index with n_s>1 on a large scale and n_s<1 on a smaller scale are generated, as favored by recent results of the first year Wilkinson Microwave Anisotropy Probe. The initial condition of new inflation is also set dynamically during hybrid inflation, and its duration and the amplitude of density fluctuations take appropriate values to help early star formation to realize early reionization.

Citations

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Quantum field theory in de Sitter space: renormalization by point-splitting

Cited by

• A note on non-commutative brane inflation
• Reconstructing large running index inflaton potentials
• Gauge field production in supergravity inflation: Local non-Gaussianity and primordial black holes
• The running spectral index as a probe of physics at high scales
• A review of axion inflation in the era of Planck
• Density fluctuations in one-field inflation