Supek Physics Colloquium

Cosmology

Precision tests of fundamental physics with cosmic large-scales

Azadeh Moradinezhad · LAPTH, Annecy

The cosmic large-scale structure (LSS) provides a powerful laboratory for testing fundamental physics, including the physics of the early Universe, non-standard dark matter scenarios, and forms of dark energy beyond a cosmological constant. Current and upcoming Stage-IV spectroscopic surveys, such as DESI and Euclid, are delivering high-precision three-dimensional maps of galaxy clustering, enabling precision tests of cosmology on mildly nonlinear scales. Fully exploiting this information requires moving beyond the galaxy power spectrum to access the non-Gaussian features of the LSS, which are particularly sensitive to subtle departures from ΛCDM. In this talk, I will present recent efforts to quantify the information content of higher-order and non-standard summary statistics for constraining physics beyond ΛCDM, with particular emphasis on early-Universe signatures such as primordial non-Gaussianity and parity violation.