Event

In the past decade, effective theories of large-scale structure (EFT) have become the premier way to constrain fundamental physics using spectroscopic surveys starting from first principles. In this talk I will discuss a promising but relatively new arena for EFT analyses: weak lensing. This includes both cross correlations science with CMB lensing, where the models used in galaxy clustering analyses can be applied out of the box, and also the weak lensing of galaxy shapes, which requires an additional EFT description of spin-2 galaxy shapes. In particular, I will highlight recent work using spectroscopically-calibrated imaging samples, including from the Dark Energy Spectroscopic Instrument (DESI), which allow us to constrain structure formation in the late universe with minimal assumptions beyond general relativity, while also highlighting some of the challenges and how we might solve them with new techniques and data.