Preprint/Internal Report

DESY-2013-00980

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cosmological perturbation theory at three-loop order

Blas, D. (Corresponding author) ; Garny, M.DESY* ; Konstandin, T.DESY*

2013

This record in other databases:  

Report No.: CERN-PH-TH/2013-203; DESY-13-161; arXiv:1309.3308

Abstract: We analyze the dark matter power spectrum at three-loop order in standard perturbation theory of large scale structure. We observe that at late times the loop expansion does not converge even for large scales (small momenta) well within the linear regime, but exhibits properties compatible with an asymptotic series. We propose a technique to restore the convergence in the limit of small momentum, and use it to obtain a perturbative expansion with improved convergence for momenta in the range where baryonic acoustic oscillations are present. Our results are compared with data from N-body simulations at different redshifts, and we find good agreement within this range.

Note: 29 pages, 8 figures, 1 table

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 514 - Theoretical Particle Physics (POF2-514) (POF2-514)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2013

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Database coverage:
; Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Blas, D. (Corresponding Author) ; Garny, M. (Corresponding author)DESY* ; Konstandin, T.DESY*
Cosmological perturbation theory at three-loop order
Journal of cosmology and astroparticle physics 2014(01), 010 (2014) [10.1088/1475-7516/2014/01/010]2014     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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