Effect of reheating on predictions following multiple-field inflation
| Autor: | Ewan R. M. Tarrant, Joel Meyers, Selim C. Hotinli, Layne C. Price, Jonathan Frazer, Andrew H. Jaffe |
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| Rok vydání: | 2018 |
| Předmět: |
High Energy Physics - Theory
Physics Spectral index Particle physics Cosmology and Nongalactic Astrophysics (astro-ph.CO) 010308 nuclear & particles physics FOS: Physical sciences Perturbation (astronomy) Observable Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences High Energy Physics - Phenomenology General Relativity and Quantum Cosmology High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Theory (hep-th) 0103 physical sciences ddc:530 010306 general physics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Physical Review D Physical review / D 97(2), 023511 (2018). doi:10.1103/PhysRevD.97.023511 |
| ISSN: | 2470-0029 2470-0010 0021-3640 0254-3052 1475-7516 |
| DOI: | 10.1103/physrevd.97.023511 |
| Popis: | Physical review / D 97(2), 023511 (2018). doi:10.1103/PhysRevD.97.023511 We study the sensitivity of cosmological observables to the reheating phase following inflation driven by many scalar fields. We describe a method which allows semi-analytic treatment of the impact of perturbative reheating on cosmological perturbations using the sudden decay approximation. Focusing on $\cal{N}$-quadratic inflation, we show how the scalar spectral index and tensor-to-scalar ratio are affected by the rates at which the scalar fields decay into radiation. We find that for certain choices of decay rates, reheating following multiple-field inflation can have a significant impact on the prediction of cosmological observables. Published by APS, Woodbury, NY |
| Databáze: | OpenAIRE |
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