An analytic hybrid halo + perturbation theory model for small-scale correlators: baryons, halos, and galaxies

Abstract We update Halo Zeldovich Perturbation Theory (HZPT, [1]), an analytic model for the two-point statistics of dark matter, to describe halo and galaxy clustering, galaxy-matter cross-correlation on nonlinear scales. The correcting has Fourier transform, therefore is valid in both configuration space space. accurate at 2%-level or less P_mm (k< 1 h/Mpc), P_hm P_hh 2 P gm gg ξ mm (r> Mpc/h), hm hh LRG-like mock galaxies. show that HZPT matter correlators can account effects a wide range baryonic feedback models provide two extended which are 1% (3%) accuracy k < 10 (8) h/Mpc. explicitly non-perturbative features exclusion halo-halo galaxy-galaxy correlators, as well presence satellites correlation functions. perform density estimation using N-body simulations HOD mocks obtain correlations parameters with cosmological Ω m σ 8 . fast, interpretable, combined-probe analyses redshift surveys scales into non-linear regime.