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Time-sliced perturbation theory II: baryon acoustic oscillations and infrared resummation

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Blas, Diego, Garny, Mathias, Ivanov, Mikhail M., Sibiryakov, Sergey·2016·Journal of Cosmology and Astroparticle Physics

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.

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Metadata

Authors
Blas, D., Garny, M., Ivanov, M. M., & Sibiryakov, S.
Venue
Journal of Cosmology and Astroparticle Physics
Published
2016-07-19
Volume
2016
Issue
07
Pages
028-028
ISSN
  • 1475-7508 (ISSN-L)
  • 1475-7516
OpenAlex
W2384054421
Cited by
196
References
1
FWCI
4.23
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Time-sliced perturbation theory II: baryon acoustic oscillations and infrared resummation. https://app.cochat.ai/papers/10.1088/1475-7516/2016/07/028
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Blas, D., Garny, M., Ivanov, M. M., & Sibiryakov, S. (2016). Time-sliced perturbation theory II: baryon acoustic oscillations and infrared resummation. Journal of Cosmology and Astroparticle Physics. https://doi.org/10.1088/1475-7516/2016/07/028

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