Limits on clustering and smooth quintessence from the EFTofLSS

Dec 14, 2020
41 pages
Published in:
  • JCAP 03 (2024) 032
  • Published: Mar 14, 2024
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Abstract: (IOP)
We apply the Effective Field Theory of Large-Scale Structure (EFTofLSS) to analyzecosmological models with clustering quintessence, which allows us to consistently describe theparameter region in which the quintessence equation of state w < -1. First, we extend thedescription of biased tracers in redshift space to the presence of clustering quintessence, andcompute the one-loop power spectrum. We solve the EFTofLSS equations using the exact timedependence, which is relevant to obtain unbiased constraints. Then, fitting the full shape of BOSSpre-reconstructed power spectrum measurements, the BOSS post-reconstruction BAO measurements, BAOmeasurements from 6DF/MGS and eBOSS, the Supernovae from Pantheon, and a prior from BBN, we boundthe clustering quintessence equation of state parameter w = -1.0110.048_{-0.048}+0.053^{+0.053} at 68%C.L. Further combining with Planck, we obtain w = -1.0280.030_{-0.030}+0.037^{+0.037} at 68% C.L. Wealso obtain constraints on smooth quintessence, in the physical regime w ≥ -1: combining alldatasets, we get -1 ≤ w < -0.979 at 68% C.L. These results strongly support a cosmological constant.
Note:
  • 41 pages, 10 figures. v2: minor modifications, added references, matches JCAP published version
  • cosmological parameters from LSS
  • power spectrum
  • dark energy theory
  • galaxy clustering
  • nucleosynthesis: big bang
  • quintessence
  • equation of state
  • galaxy: power spectrum
  • effective field theory
  • cosmological constant