Reconstructing large running index inflaton potentials

2004/04/30 by Chiyi Chen, Chi-Yi Chen, Bo Feng +2
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph #hep-ph #hep-th

paper · pdf · doi:10.1088/0264-9381/21/13/008

published as Class.Quant.Grav. 21 (2004) 3223-3236 · Final version to appear in Class. Quant. Grav. References added

arxiv created 2004/05/24 · openalex publication_date 2004/06/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

Recent fits of cosmological parameters by first-year Wilkinson Microwave Anisotropy Probe (WMAP) measurements seem to favour a primordial scalar spectrum with a large varying index from blue to red. We use the inflationary flow equations to reconstruct large running index inflaton potentials and comment on the current status of the inflationary flow. We find that previous negligence of higher order slow-rolling contributions when using the flow equations would lead to unprecise results.

Citations

• The statistical significance of the low cosmic microwave background mulitipoles
• Inflation model with lower multipoles of the CMB suppressed
• Chaotic hybrid new inflation in supergravity with a running spectral index
• Running of the scalar spectral index from inflationary models
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters