Neelima Sehgal
Associate Professor
Physics and Astronomy Department,
Stony Brook University, Stony Brook, NY

Mapping Dark Matter on Large and Small Scales with the Cosmic Microwave Background

In this talk I will discuss the next frontier of research on the Cosmic Microwave Background (CMB): precisely measuring the gravitational lensing of the CMB.  This CMB lensing signal encodes a wealth of statistical information about the distribution of matter in the Universe, which is sensitive to the total mass of the neutrinos and the particle properties of dark matter.   I will discuss upcoming results using data from the Atacama Cosmology Telescope, and forecasts for the near-future Simons Observatory and CMB-S4 experiments. I will also discuss a novel and powerful way to probe dark matter particle properties using very high resolution CMB lensing measurements, and a new experiment being developed, called CMB-HD, that can achieve this science.