English

BOSS Correlation Function Analysis from the Effective Field Theory of Large-Scale Structure

Cosmology and Nongalactic Astrophysics 2022-03-02 v3

Abstract

After calibrating the predictions of the Effective Field Theory of Large-Scale Structure against several sets of simulations, as well as implementing a new method to assert the scale cut of the theory without the use of any simulation, we analyze the Full Shape of the BOSS Correlation Function. Imposing a prior from Big Bang Nucleosynthesis on the baryon density, we are able to measure all the parameters in Λ\LambdaCDM + massive neutrinos in normal hierarchy, except for the total neutrino mass, which is just bounded. When combining the BOSS Full Shape with the Baryon Acoustic Oscillation measurements from BOSS, 6DF/MGS and eBOSS, we determine the present day Hubble constant, H0H_0, the present matter fraction, Ωm\Omega_m, the amplitude of the primordial power spectrum, AsA_s, and the tilt of the primordial power spectrum, nsn_s, to 1.4%,4.5%,23.5%1.4 \%, 4.5 \%, 23.5\% and 7.6%7.6\% precision, respectively, at 68%68 \%-confidence level, finding H0=68.19±0.99H_0=68.19 \pm 0.99 (km/s)/Mpc, Ωm=0.309±0.014\Omega_m=0.309\pm 0.014, ln(1010As)=3.120.26+0.21\ln (10^{10}A_{s })=3.12^{+0.21}_{-0.26} and ns=0.9630.085+0.062n_s=0.963^{+0.062}_{-0.085}, and we bound the total neutrino mass to 0.87eV0.87 \, \textrm{eV} at 95%95 \%-confidence level. These constraints are fully consistent with Planck results and the ones obtained from BOSS power spectrum analysis. In particular, we find no tension in H0H_0 or σ8\sigma_8 with Planck measurements, finding consistency at 1.2σ1.2\sigma and 0.6σ0.6\sigma, respectively.

Keywords

Cite

@article{arxiv.2110.07539,
  title  = {BOSS Correlation Function Analysis from the Effective Field Theory of Large-Scale Structure},
  author = {Pierre Zhang and Guido D'Amico and Leonardo Senatore and Cheng Zhao and Yifu Cai},
  journal= {arXiv preprint arXiv:2110.07539},
  year   = {2022}
}

Comments

19+21 pages, 11 figures. v2: fixed minor mistake in PS+BAO; main results and conclusions unchanged. v3: 20+21 pages, 11 figures, matches version in JCAP, explanation improved

R2 v1 2026-06-24T06:53:41.852Z