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Title: Limits on clustering and smooth quintessence from the EFTofLSS

Journal Article · · Journal of Cosmology and Astroparticle Physics
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. Univ. of Parma (Italy); Istituto Nazionale di Fisica Nucleare (INFN), Parma (Italy); SLAC
  2. Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland); Stanford Univ., CA (United States). Stanford Inst. of Theoretical Physics (ITP); Stanford Univ., CA (United States). Kavli Institute for Particle Astrophysics & Cosmology
  3. Stanford Univ., CA (United States). Stanford Inst. of Theoretical Physics (ITP); Stanford Univ., CA (United States). Kavli Institute for Particle Astrophysics & Cosmology
  4. Univ. of Science and Technology of China, Hefei (China)
+ Show Author Affiliations

We apply the Effective Field Theory of Large-Scale Structure (EFTofLSS) to analyze cosmological models with clustering quintessence, which allows us to consistently describe the parameter region in which the quintessence equation of state w < -1. First, we extend the description of biased tracers in redshift space to the presence of clustering quintessence, and compute the one-loop power spectrum. We solve the EFTofLSS equations using the exact time dependence, which is relevant to obtain unbiased constraints. Then, fitting the full shape of BOSS pre-reconstructed power spectrum measurements, the BOSS post-reconstruction BAO measurements, BAO measurements from 6DF/MGS and eBOSS, the Supernovae from Pantheon, and a prior from BBN, we bound the clustering quintessence equation of state parameter w = -1.011-0.048 +0.053 at 68% C.L. Further combining with Planck, we obtain w = -1.028-0.030+0.037 at 68% C.L. We also obtain constraints on smooth quintessence, in the physical regime w ≥ -1: combining all datasets, we get -1 ≤ w < -0.979 at 68% C.L. These results strongly support a cosmological constant.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
KIPAC
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
2396971
Journal Information:
Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 03 Vol. 2024; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
cosmological parameters from LSS
dark energy theory
galaxy clustering
power spectrum