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Title: An effective description of dark matter and dark energy in the mildly non-linear regime

Abstract

In the next few years, we are going to probe the low-redshift universe with unprecedented accuracy. Among the various fruits that this will bear, it will greatly improve our knowledge of the dynamics of dark energy, though for this there is a strong theoretical preference for a cosmological constant. We assume that dark energy is described by the so-called Effective Field Theory of Dark Energy, which assumes that dark energy is the Goldstone boson of time translations. Such a formalism makes it easy to ensure that our signatures are consistent with well-established principles of physics. Since most of the information resides at high wavenumbers, it is important to be able to make predictions at the highest wavenumber that is possible. Furthermore, the Effective Field Theory of Large-Scale Structure (EFTofLSS) is a theoretical framework that has allowed us to make accurate predictions in the mildly non-linear regime. In this paper, we derive the non-linear equations that extend the EFTofLSS to include the effect of dark energy both on the matter fields and on the biased tracers. For the specific case of clustering quintessence, we then perturbatively solve to cubic order the resulting non-linear equations and construct the one-loop power spectrum ofmore » the total density contrast.« less

Authors:
 [1];  [2];  [3]
  1. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Univ. Paris Saclay, Gif-sur-Yvette (France)
  2. Institute for Research in Fundamental Sciences (IPM), Tehran (Iran)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1369465
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2017; Journal Issue: 05; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; cosmological parameters from LSS; dark energy theory; dark matter theory; power spectrum

Citation Formats

Lewandowski, Matthew, Maleknejad, Azadeh, and Senatore, Leonardo. An effective description of dark matter and dark energy in the mildly non-linear regime. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/05/038.
Lewandowski, Matthew, Maleknejad, Azadeh, & Senatore, Leonardo. An effective description of dark matter and dark energy in the mildly non-linear regime. United States. doi:10.1088/1475-7516/2017/05/038.
Lewandowski, Matthew, Maleknejad, Azadeh, and Senatore, Leonardo. Thu . "An effective description of dark matter and dark energy in the mildly non-linear regime". United States. doi:10.1088/1475-7516/2017/05/038. https://www.osti.gov/servlets/purl/1369465.
@article{osti_1369465,
title = {An effective description of dark matter and dark energy in the mildly non-linear regime},
author = {Lewandowski, Matthew and Maleknejad, Azadeh and Senatore, Leonardo},
abstractNote = {In the next few years, we are going to probe the low-redshift universe with unprecedented accuracy. Among the various fruits that this will bear, it will greatly improve our knowledge of the dynamics of dark energy, though for this there is a strong theoretical preference for a cosmological constant. We assume that dark energy is described by the so-called Effective Field Theory of Dark Energy, which assumes that dark energy is the Goldstone boson of time translations. Such a formalism makes it easy to ensure that our signatures are consistent with well-established principles of physics. Since most of the information resides at high wavenumbers, it is important to be able to make predictions at the highest wavenumber that is possible. Furthermore, the Effective Field Theory of Large-Scale Structure (EFTofLSS) is a theoretical framework that has allowed us to make accurate predictions in the mildly non-linear regime. In this paper, we derive the non-linear equations that extend the EFTofLSS to include the effect of dark energy both on the matter fields and on the biased tracers. For the specific case of clustering quintessence, we then perturbatively solve to cubic order the resulting non-linear equations and construct the one-loop power spectrum of the total density contrast.},
doi = {10.1088/1475-7516/2017/05/038},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2017,
place = {United States},
year = {Thu May 18 00:00:00 EDT 2017},
month = {Thu May 18 00:00:00 EDT 2017}
}

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