Jun 5 – 6, 2025
ETH Zurich
UTC timezone

Probing the Universe with Effective Field Theory

Jun 6, 2025, 9:45 AM
15m
Siemens Auditorium (HIT E 51) (ETH Zurich)

Siemens Auditorium (HIT E 51)

ETH Zurich

Wolfgang-Pauli-Strasse 27 HIT Building CH-8093 Zürich
Theory (no GW) Theory (no GW)

Speaker

Anton Chudaykin (University of Geneva)

Description

I will briefly review the main concepts of the EFT of Large-Scale Structure, a theoretical framework that provides a systematic analytic description of cosmological observables on large scales. I will present a general perturbative model for a tracer of matter that depends on the line-of-sight selection effects, and argue that it applies to the Lyman alpha forest. Then, I will formulate the one-loop EFT model for the cross-spectrum of the Lyman-alpha forest and a generic biased tracer of matter. Then, I will discuss implications of the EFT of Dark Energy, which provides a systematic description of linear perturbations in general scalar-tensor theories. Focusing on general Horndeski theories, I will present constraints on modified gravity from the CMB, CMB lensing, CMB ISW-lensing, DESI BAO DR1, and SN Ia datasets.

Author

Anton Chudaykin (University of Geneva)

Presentation materials