8 papers
Lyman-Alpha Forest and its Cross-Correlation with High-Redshift Galaxies in Effective Field Theory at the Field Level
Roger de Belsunce, Mikhail M. Ivanov, James M. Sullivan +2
We present a field-level perturbative forward model for the Lyman-alpha (Lya) forest flux decrement. We validate it on two simulation suites: large-volume AbacusSummit N-body simul…
Control variates from Eulerian and Lagrangian perturbation theory: Application to the bispectrum
Nickolas Kokron, Shi-Fan Chen
Control variates have seen recent interest as a powerful technique to reduce the variance of summary statistics measured from costly cosmological -body simulations. Of particula…
Cosmic Shear in Effective Field Theory at Two-Loop Order: Revisiting in Dark Energy Survey Data
Shi-Fan Chen, Joseph DeRose, Mikhail M. Ivanov +1
Cosmic shear is a powerful probe of cosmological distances, matter abundance and clustering in the low-redshift Universe. Cosmological parameter extraction from cosmic shear data i…
Reanalyzing DESI DR1: 4. Percent-Level Cosmological Constraints from Combined Probes and Robust Evidence for the Normal Neutrino Mass Hierarchy
Mikhail M. Ivanov, James M. Sullivan, Roger de Belsunce +4
We present cosmological parameter measurements from the full combination of DESI DR1 galaxy clustering data, described with large-scale structure effective field theory. By incorpo…
Effective Theories of Redshift-Space Galaxy Peculiar Velocities
Shi-Fan Chen, Cullan Howlett, Yan Lai +1
We present predictions for redshift-space peculiar velocity statistics in the Lagrangian and Eulerian formulations of the effective field theory (EFT) of large-scale structure. We…
Modeling the Cosmological Lyman- Forest at the Field Level
Roger de Belsunce, Mikhail M. Ivanov, James M. Sullivan +2
The distribution of absorption lines in the spectra of distant quasars, called the Lyman- (Ly-) forest, is a unique probe of cosmology and the intergalactic medium at high…