Effect of reheating on predictions following multiple-field inflation

Selim C. Hotinli; Jonathan Frazer; Andrew H. JaffeJoel MeyersLayne C. PriceEwan R. M. Tarrant

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Effect of reheating on predictions following multiple-field inflation

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We study the sensitivity of cosmological observables to the reheating phase following inflation driven by many scalar fields.We describe a method which allows semianalytic treatment of the impact of perturbative reheating on cosmological perturbations using the sudden decay approximation. Focusing on 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.

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来源
《Physical review, D》 |2018年第2期|023511-1-023511-13|共13页
作者
Selim C. Hotinli; Jonathan Frazer; Andrew H. JaffeJoel MeyersLayne C. PriceEwan R. M. Tarrant;
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作者单位

Astrophysics Group & Imperial Centre for Inference and Cosmology, Department of Physics, Imperial College London, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, United Kingdom;

Deutsches Elektronen-Synchrotron DESY, Theory Group, 22603 Hamburg, Germany;

Canadian Institute for Theoretical Astrophysics, University of Toronto, Toronto, Ontario M5S 3H8, CanadaMcWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USAAstronomy Centre, University of Sussex, Falmer, Brighton BN1 9QH, United Kingdom;

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原文格式 PDF
正文语种英语
中图分类粒子物理学;场论;
关键词
Effect of reheating; predictions following; multiple-field inflation;

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Effect of reheating on predictions following multiple-field inflation

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