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Title: A Lagrangian effective field theory

Journal Article · · Journal of Cosmology and Astroparticle Physics
 [1];  [2];  [3]
  1. Stanford Institute for Theoretical Physics and Department of Physics, Stanford University, 452 Lomita Mall, Stanford, CA 94306 (United States)
  2. Department of Physics, University of California, LeConte Hall, Berkeley, CA 94720 (United States)
  3. Department of Astronomy, University of California, Campbell Hall, Berkeley, CA 94720 (United States)

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. All the perturbative models fare better than linear theory.

OSTI ID:
22525478
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 09; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
Country of Publication:
United States
Language:
English

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Convolution Lagrangian perturbation theory for biased tracers text January 2012
The Lagrangian-space Effective Field Theory of Large Scale Structures text January 2013
Lagrangian or Eulerian; Real or Fourier? Not All Approaches to Large-Scale Structure Are Created Equal text January 2013
N-point Statistics of Large-Scale Structure in the Zel'dovich Approximation text January 2013
Time-analyticity of Lagrangian particle trajectories in ideal fluid flow text January 2013
The Zeldovich approximation text January 2014
A 2.5% measurement of the growth rate from small-scale redshift space clustering of SDSS-III CMASS galaxies text January 2014
The IR-resummed Effective Field Theory of Large Scale Structures text January 2014
Analytic model for the matter power spectrum, its covariance matrix, and baryonic effects text January 2014
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Cited By (30)

Screenings in modified gravity: a perturbative approach journal January 2019
On the soft limit of the large scale structure power spectrum: UV dependence journal November 2015
Cosmological perturbation theory in 1+1 dimensions journal January 2016
Perturbation theory, effective field theory, and oscillations in the power spectrum journal March 2016
A marked correlation function for constraining modified gravity models journal November 2016
The Gaussian streaming model and convolution Lagrangian effective field theory journal December 2016
Modeling CMB lensing cross correlations with CLEFT journal August 2017
The matter power spectrum in redshift space using effective field theory journal November 2017
Nonlinear evolution of initially biased tracers in modified gravity journal November 2018
Biased tracers of two fluids in the Lagrangian picture journal June 2019
The reconstructed power spectrum in the Zeldovich approximation journal September 2019
Beating non-linearities: improving the baryon acoustic oscillations with the linear point journal November 2015
Detecting baryon acoustic oscillations in dark matter from kinematic weak lensing surveys journal May 2019
Modeling biased tracers at the field level journal August 2019
Reducing the two-loop large-scale structure power spectrum to low-dimensional, radial integrals journal November 2016
Nonlinear reconstruction of redshift space distortions journal February 2018
Renormalization of Lagrangian bias via spectral parameters journal October 2018
The effective field theory of large scale structure at three loops text January 2019
The Effective Field Theory of Large Scale Structure at Three Loops text January 2019
On the soft limit of the large scale structure power spectrum: UV dependence text January 2015
The Effective Field Theory of Large Scale Structure at Two Loops: the apparent scale dependence of the speed of sound text January 2015
Perturbation theory, effective field theory, and oscillations in the power spectrum text January 2015
FFT-PT: Reducing the two-loop large-scale structure power spectrum to low-dimensional radial integrals text January 2016
A marked correlation function for constraining modified gravity models text January 2016
The matter power spectrum in redshift space using effective field theory text January 2017
Nonlinear evolution of initially biased tracers in modified gravity text January 2018
Screenings in Modified Gravity: a perturbative approach text January 2018
Biased Tracers of Two Fluids in the Lagrangian Picture text January 2019
The Effective Field Theory of Large Scale Structure at Three Loops text January 2019
The Reconstructed Power Spectrum in the Zeldovich Approximation text January 2019

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