2017/07/31 by Sukannya Bhattacharya, Koushik Dutta, Anshuman Maharana
Physics and Astronomy · #Archaeology #Astrophysics #Black Holes and Theoretical Physics #Context (archaeology) #Cosmology #Cosmology and Gravitation Theories #Dark energy #Epoch (astronomy) #Equation of state #Galaxies: Formation, Evolution, Phenomena #History #Inflation (cosmology) #Inflationary epoch #Mathematical physics #Metric expansion of space #Moduli #Particle physics #Physics #Planck #Quantum mechanics #Theoretical physics #astro-ph.CO #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.96.083522
published as Physical Review D 96, 083522 (2017) · 11 pages, 4 figures, updated with minor changes, PRD accepted version
openalex publication_date 2017/10/23 · arxiv created 2017/11/09 · arxiv updated 2017/11/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present predictions of the K"ahler moduli inflation model for the spectral tilt by parametrizing the reheating epoch by an effective equation-of-state parameter and the number of e-foldings of reheating; and taking into account the post-inflationary history of the model. This model has an epoch in which the energy density of the universe is dominated by cold moduli particles. We compare our results with data from the Planck mission and find that exotic reheating (with effective equation of state wre greater than 1/3) or dark radiation is required to match the observations. For canonical reheating case with wre=0, we deduce log10(Tre/103 GeV)\ensuremath≃1190(ns\ensuremath-0.956). We also analyze our results in the context of observations being planned for the future and their projected sensitivities.