Preheating and entropy perturbations in axion monodromy inflation

Journal Article · Wed May 04 00:00:00 EDT 2016 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2016/05/012· OSTI ID:22572073

McDonough, Evan; Moghaddam, Hossein Bazrafshan ^[1]; Brandenberger, Robert H. ^[1]

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1. Department of Physics, McGill University,Montréal, QC H3A 2T8 (Canada)

We study the preheating of gauge fields in a simple axion monodromy model and compute the induced entropy perturbations and their effect on the curvature fluctuations. We find that the correction to the spectrum of curvature perturbations has a blue spectrum with index n{sub s}=5/2. Hence, these induced modes are harmless for the observed structure of the universe. Since the spectrum is blue, there is the danger of overproduction of primordial black holes. However, we show that the observational constraints are easily satisfied.

• Sponsoring Organization: SCOAP3, CERN, Geneva (Switzerland)
• OSTI ID: 22572073
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 05; Other Information: PUBLISHER-ID: JCAP05(2016)012; OAI: oai:repo.scoap3.org:15477; cc-by Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AXIONS
BLACK HOLES
DISTURBANCES
ENTROPY
GAUGE INVARIANCE
INFLATIONARY UNIVERSE
PERTURBATION THEORY
STRING THEORY
UNIVERSE