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Astrophysics > Cosmology and Nongalactic Astrophysics

arXiv:1605.02149 (astro-ph)
[Submitted on 7 May 2016 (v1), last revised 19 Jul 2016 (this version, v2)]

Title:Time-Sliced Perturbation Theory II: Baryon Acoustic Oscillations and Infrared Resummation

Authors:Diego Blas, Mathias Garny, Mikhail M. Ivanov, Sergey Sibiryakov
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Abstract:We use time-sliced perturbation theory (TSPT) to give an accurate description of the infrared non-linear effects affecting the baryonic acoustic oscillations (BAO) present in the distribution of matter at very large scales. In TSPT this can be done via a systematic resummation that has a simple diagrammatic representation and does not involve uncontrollable approximations. We discuss the power counting rules and derive explicit expressions for the resummed matter power spectrum up to next-to leading order and the bispectrum at the leading order. The two-point correlation function agrees well with N-body data at BAO scales. The systematic approach also allows to reliably assess the shift of the baryon acoustic peak due to non-linear effects.
Comments: 38 pages + 24 pages of appendices and references, 8 figures; comparison with the Zel'dovich approximation added (Fig.8); version published in JCAP
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Theory (hep-th)
Report number: CERN-TH-2016-059, INR-TH-2016-009
Cite as: arXiv:1605.02149 [astro-ph.CO]
  (or arXiv:1605.02149v2 [astro-ph.CO] for this version)
  https://doi.org/10.48550/arXiv.1605.02149
Journal reference: JCAP 07 (2016) 028
Related DOI: https://doi.org/10.1088/1475-7516/2016/07/028

Submission history

From: Mikhail M. Ivanov [view email]
[v1] Sat, 7 May 2016 06:35:16 UTC (1,777 KB)
[v2] Tue, 19 Jul 2016 13:33:08 UTC (2,033 KB)
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