Combined Clustering and Weak Lensing Results from the DESI Year-1 Dataset and Stage III Lensing Surveys.

The combination of galaxy clustering and weak gravitational lensing has emerged as a powerful tool for measuring the growth of cosmic structure over time, which encodes information about the physics of gravity, the nature of dark energy and dark matter and the properties of light degrees of freedom in our universe such as the mass of the neutrinos. In this talk I will present new constraints from the Dark Energy Spectroscopic Instrument (DESI) collaboration on the growth of cosmic structure derived by jointly analyzing galaxy clustering measured with the DESI Year-1 dat set and weak lensing derived from stage III surveys. In particular, I will describe the advances in systematics treatments afforded by DESI data, and the new modeling techniques required to accurately extract cosmological information from this data set. Then I will show how these measurements compare to previous combined clustering and lensing analyses, shedding light on potential tensions between low redshift structure and the cosmic microwave background.