2017/12/31 by Anshuman Maharana, Ivonne Zavala
Mathematics · Physics and Astronomy · #Astronomy #Astrophysics #COSMIC cancer database #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Galaxies: Formation, Evolution, Phenomena #Geometry #Horizon #Inflation (cosmology) #Mathematical physics #Mathematics #Parameter space #Particle physics #Physics #Quantum mechanics #Scalar (mathematics) #Tensor (intrinsic definition) #Theoretical physics #astro-ph.CO #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.97.123518
published as Phys. Rev. D 97, 123518 (2018) · 19 pages, 2 figures. References added, minor changes. Version to appear in PRD
arxiv created 2018/05/31 · openalex publication_date 2018/06/13 · arxiv updated 2018/06/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Scalar fields provide attractive modifications of pre-BBN cosmology, which have interesting implications for dark matter abundances. We analyze the effect of these modifications on the number of e-foldings between the horizon exit of cosmic microwave background modes and the end of inflation (Nk), and examine the consequences for inflationary predictions of various models. We find significant effects in the predictions in the (ns,r) plane. For a large part of the parameter space, the shift in Nk is positive; this ameliorates the tension of m2\ensuremathφ2 and natural inflation with data.