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Title: A Lagrangian effective field theory

Abstract

We have continued the development of Lagrangian, cosmological perturbation theory for the low-order correlators of the matter density field. We provide a new route to understanding how the effective field theory (EFT) of large-scale structure can be formulated in the Lagrandian framework and a new resummation scheme, comparing our results to earlier work and to a series of high-resolution N-body simulations in both Fourier and configuration space. The `new' terms arising from EFT serve to tame the dependence of perturbation theory on small-scale physics and improve agreement with simulations (though with an additional free parameter). We find that all of our models fare well on scales larger than about two to three times the non-linear scale, but fail as the non-linear scale is approached. This is slightly less reach than has been seen previously. At low redshift the Lagrangian model fares as well as EFT in its Eulerian formulation, but at higher z the Eulerian EFT fits the data to smaller scales than resummed, Lagrangian EFT. Furthermore, all the perturbative models fare better than linear theory.

Authors:
 [1];  [2];  [2]
  1. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1270630
Report Number(s):
SLAC-PUB-16655
Journal ID: ISSN 1475-7516; arXiv:1506.05264
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 09; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; astrophysics; ASTRO; cosmological parameters from LSS; power spectrum; baryon acoustic oscillations; galaxy clustering

Citation Formats

Vlah, Zvonimir, White, Martin, and Aviles, Alejandro. A Lagrangian effective field theory. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/09/014.
Vlah, Zvonimir, White, Martin, & Aviles, Alejandro. A Lagrangian effective field theory. United States. doi:10.1088/1475-7516/2015/09/014.
Vlah, Zvonimir, White, Martin, and Aviles, Alejandro. Wed . "A Lagrangian effective field theory". United States. doi:10.1088/1475-7516/2015/09/014. https://www.osti.gov/servlets/purl/1270630.
@article{osti_1270630,
title = {A Lagrangian effective field theory},
author = {Vlah, Zvonimir and White, Martin and Aviles, Alejandro},
abstractNote = {We have continued the development of Lagrangian, cosmological perturbation theory for the low-order correlators of the matter density field. We provide a new route to understanding how the effective field theory (EFT) of large-scale structure can be formulated in the Lagrandian framework and a new resummation scheme, comparing our results to earlier work and to a series of high-resolution N-body simulations in both Fourier and configuration space. The `new' terms arising from EFT serve to tame the dependence of perturbation theory on small-scale physics and improve agreement with simulations (though with an additional free parameter). We find that all of our models fare well on scales larger than about two to three times the non-linear scale, but fail as the non-linear scale is approached. This is slightly less reach than has been seen previously. At low redshift the Lagrangian model fares as well as EFT in its Eulerian formulation, but at higher z the Eulerian EFT fits the data to smaller scales than resummed, Lagrangian EFT. Furthermore, all the perturbative models fare better than linear theory.},
doi = {10.1088/1475-7516/2015/09/014},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 09,
volume = 2015,
place = {United States},
year = {2015},
month = {9}
}

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Cited by: 16 works
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    Works referencing / citing this record:

    The effective field theory of large scale structure at three loops
    journal, November 2019

    • Konstandin, Thomas; Porto, Rafael A.; Rubira, Henrique
    • Journal of Cosmology and Astroparticle Physics, Vol. 2019, Issue 11
    • DOI: 10.1088/1475-7516/2019/11/027