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  Running of the scalar spectral index in bouncing cosmologies

Lehners, J.-L., & Wilson-Ewing, E. (2015). Running of the scalar spectral index in bouncing cosmologies. Journal of Cosmology and Astroparticle Physics, 10: 038. doi:10.1088/1475-7516/2015/10/038.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-1D6B-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-9AD0-5
Genre: Journal Article

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 Creators:
Lehners, Jean-Luc1, Author              
Wilson-Ewing, Edward2, Author              
Affiliations:
1String Cosmology, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1753351              
2Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_24014              

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Free keywords: Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO,General Relativity and Quantum Cosmology, gr-qc,High Energy Physics - Theory, hep-th
 Abstract: We calculate the running of the scalar index in the ekpyrotic and matter bounce cosmological scenarios, and find that it is typically negative for ekpyrotic models, while it is typically positive for realizations of the matter bounce where multiple fields are present. This can be compared to inflation, where the observationally preferred models typically predict a negative running. The magnitude of the running is expected to be between $10^{-4}$ and up to $10^{-2},$ leading in some cases to interesting expectations for near-future observations.

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 Dates: 2015-07-292015
 Publication Status: Published in print
 Pages: 6 pages
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1507.08112
DOI: 10.1088/1475-7516/2015/10/038
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Title: Journal of Cosmology and Astroparticle Physics
Source Genre: Journal
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Publ. Info: Bristol, England : Institute of Physics Pub.
Pages: - Volume / Issue: 10 Sequence Number: 038 Start / End Page: - Identifier: ISSN: 1475-7516