Abstract
Abstract
The effective field theory likelihood for the density field of biased tracers allows for
cosmology inference from the clustering of galaxies that consistently uses
all available information at a given order in perturbation theory. This paper
presents results and implementation details on the real-space
(as opposed to Fourier-space) formulation
of the likelihood, which allows for the incorporation of survey window
functions. The implementation further uses a Lagrangian forward model
for biased tracers which automatically accounts for all relevant contributions up to
any desired order. Unbiased inference of σ8 is demonstrated at
the 2% level for cutoff values Ł ≲ 0.14 h Mpc-1 for halo samples over
a range of masses and redshifts. The inferred value shows the expected convergence to the ground truth in the low-cutoff limit. Apart from the possibility of including observational effects, this represents further substantial improvement over previous
results based on the EFT likelihood.
Subject
Astronomy and Astrophysics
Cited by
11 articles.
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