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Title: On observables in a dark matter-clustering quintessence system

Abstract

We report on a system where dark matter dynamics is enriched by the presence of clustering quintessence in the approximation where the system is effectively reduced to one degree of freedom. Here, we observe the corresponding observables up to one-loop order and then point out similarities between the power spectrum of the reduced system and the behaviour of non-equal time pure dark matter correlators. We then focus on the one-loop total density power spectrum in the IR limit as a diagnostic tool for consistency relations breaking. Unlike the non-equal time case, the reduced system does still obey consistency relations; we illustrate this by explicitly verifying the 1-loop IR cancellation. A more general setup, obtained by relaxing the assumption of a vanishing sound speed, is also analyzed. In this and similar scenarios the presence of additional dynamics, typical of dark energy and modified gravity models, implies that one may no longer gauge away the squeezed contribution of observables such as the dark matter bispectrum. We show how these effects propagate all the way to biased tracers.

Authors:
 [1];  [2]
  1. Univ. of Portsmouth (United Kingdom); Stanford Univ., CA (United States)
  2. European Organization for Nuclear Research (CERN), Geneva (Switzerland); Stanford Univ., 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, National Science Foundation (NSF)
OSTI Identifier:
1532507
Grant/Contract Number:  
AC02-76SF00515; PHY-1068380
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2019; 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; dark energy theory; modified gravity; power spectrum

Citation Formats

Fasiello, Matteo, and Vlah, Zvonimir. On observables in a dark matter-clustering quintessence system. United States: N. p., 2019. Web. doi:10.1088/1475-7516/2019/05/033.
Fasiello, Matteo, & Vlah, Zvonimir. On observables in a dark matter-clustering quintessence system. United States. doi:10.1088/1475-7516/2019/05/033.
Fasiello, Matteo, and Vlah, Zvonimir. Tue . "On observables in a dark matter-clustering quintessence system". United States. doi:10.1088/1475-7516/2019/05/033.
@article{osti_1532507,
title = {On observables in a dark matter-clustering quintessence system},
author = {Fasiello, Matteo and Vlah, Zvonimir},
abstractNote = {We report on a system where dark matter dynamics is enriched by the presence of clustering quintessence in the approximation where the system is effectively reduced to one degree of freedom. Here, we observe the corresponding observables up to one-loop order and then point out similarities between the power spectrum of the reduced system and the behaviour of non-equal time pure dark matter correlators. We then focus on the one-loop total density power spectrum in the IR limit as a diagnostic tool for consistency relations breaking. Unlike the non-equal time case, the reduced system does still obey consistency relations; we illustrate this by explicitly verifying the 1-loop IR cancellation. A more general setup, obtained by relaxing the assumption of a vanishing sound speed, is also analyzed. In this and similar scenarios the presence of additional dynamics, typical of dark energy and modified gravity models, implies that one may no longer gauge away the squeezed contribution of observables such as the dark matter bispectrum. We show how these effects propagate all the way to biased tracers.},
doi = {10.1088/1475-7516/2019/05/033},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2019,
place = {United States},
year = {2019},
month = {5}
}

Journal Article:
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This content will become publicly available on May 21, 2020
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