GGI workshop: Exploring New Frontiers in Cosmology

Constraining 2-loop EFTofLSS with weak lensing

Non programmé

20m

Galileo Galilei Institute

Talk at conference (week 3)

Orateur

DESPOINA FARAKOU (CEICO, FZU)

Description

We present the Sym-EFT emulator [arXiv:2511.05093], which enables fast and accurate predictions for the nonlinear matter power spectrum up to two loops within the Effective Field Theory of Large-Scale Structure (EFTofLSS). We discuss its applications to weak gravitational lensing, including constraints on 2-loop EFTofLSS counterterms from current DES Year 3 cosmic shear and CMB lensing data. We study the sensitivity of these lensing observables to EFT contributions and assess their constraining power on effective parameters describing nonlinear clustering. Our results demonstrate the potential of combining EFT-based modelling with current weak lensing measurements for precision cosmology.