The Effective Field Theory of Large Scale Structures at two loops
Abstract
Here, large scale structure surveys promise to be the next leading probe of cosmological information. It is therefore crucial to reliably predict their observables. The Effective Field Theory of Large Scale Structures (EFTofLSS) provides a manifestly convergent perturbation theory for the weakly non-linear regime of dark matter, where correlation functions are computed in an expansion of the wavenumber k of a mode over the wavenumber associated with the non-linear scale kNL. Since most of the information is contained at high wavenumbers, it is necessary to compute higher order corrections to correlation functions. After the one-loop correction to the matter power spectrum, we estimate that the next leading one is the two-loop contribution, which we compute here. At this order in k/kNL, there is only one counterterm in the EFTofLSS that must be included, though this term contributes both at tree-level and in several one-loop diagrams. We also discuss correlation functions involving the velocity and momentum fields. We find that the EFTofLSS prediction at two loops matches to percent accuracy the non-linear matter power spectrum at redshift zero up to k~ 0.6 h Mpc–1, requiring just one unknown coefficient that needs to be fit to observations. Given that Standard Perturbation Theorymore »
- Authors:
-
- Stanford Univ., Stanford, CA (United States)
- Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
- Publication Date:
- Research Org.:
- Stanford Univ., CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1491160
- Grant/Contract Number:
- SC0008078
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Cosmology and Astroparticle Physics
- Additional Journal Information:
- Journal Volume: 2014; Journal Issue: 07; Journal ID: ISSN 1475-7516
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; power spectrum; cosmological perturbation theory
Citation Formats
Carrasco, John Joseph M., Foreman, Simon, Green, Daniel, and Senatore, Leonardo. The Effective Field Theory of Large Scale Structures at two loops. United States: N. p., 2014.
Web. doi:10.1088/1475-7516/2014/07/057.
Carrasco, John Joseph M., Foreman, Simon, Green, Daniel, & Senatore, Leonardo. The Effective Field Theory of Large Scale Structures at two loops. United States. https://doi.org/10.1088/1475-7516/2014/07/057
Carrasco, John Joseph M., Foreman, Simon, Green, Daniel, and Senatore, Leonardo. Thu .
"The Effective Field Theory of Large Scale Structures at two loops". United States. https://doi.org/10.1088/1475-7516/2014/07/057. https://www.osti.gov/servlets/purl/1491160.
@article{osti_1491160,
title = {The Effective Field Theory of Large Scale Structures at two loops},
author = {Carrasco, John Joseph M. and Foreman, Simon and Green, Daniel and Senatore, Leonardo},
abstractNote = {Here, large scale structure surveys promise to be the next leading probe of cosmological information. It is therefore crucial to reliably predict their observables. The Effective Field Theory of Large Scale Structures (EFTofLSS) provides a manifestly convergent perturbation theory for the weakly non-linear regime of dark matter, where correlation functions are computed in an expansion of the wavenumber k of a mode over the wavenumber associated with the non-linear scale kNL. Since most of the information is contained at high wavenumbers, it is necessary to compute higher order corrections to correlation functions. After the one-loop correction to the matter power spectrum, we estimate that the next leading one is the two-loop contribution, which we compute here. At this order in k/kNL, there is only one counterterm in the EFTofLSS that must be included, though this term contributes both at tree-level and in several one-loop diagrams. We also discuss correlation functions involving the velocity and momentum fields. We find that the EFTofLSS prediction at two loops matches to percent accuracy the non-linear matter power spectrum at redshift zero up to k~ 0.6 h Mpc–1, requiring just one unknown coefficient that needs to be fit to observations. Given that Standard Perturbation Theory stops converging at redshift zero at k~ 0.1 h Mpc–1, our results demonstrate the possibility of accessing a factor of order 200 more dark matter quasi-linear modes than naively expected. If the remaining observational challenges to accessing these modes can be addressed with similar success, our results show that there is tremendous potential for large scale structure surveys to explore the primordial universe.},
doi = {10.1088/1475-7516/2014/07/057},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 07,
volume = 2014,
place = {United States},
year = {Thu Jul 31 00:00:00 EDT 2014},
month = {Thu Jul 31 00:00:00 EDT 2014}
}
Web of Science
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