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2020

Sigma-Eight at the Percent Level: The EFT Likelihood in Real Space

Schmidt, Fabian

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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 $\sigma_8$ is demonstrated at the 2% level for cutoff values $\Lambda \leq 0.14h\,{\rm Mpc}^{-1}$ for halo samples over a range of masses and redshifts.

Sigma-Eight at the Percent Level: The EFT Likelihood in Real Space · Around

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