Physics Colloquium of 30 July 2024

"Discoveries from CMB-HD"
Neelima Sehgal, Stony Brook University

Cosmic Microwave Background (CMB) experiments have contributed powerful constraints on the fundamental physics of the Universe. Upcoming CMB experiments such as the Simons Observatory and CMB-S4 are poised to extend this progress even further. However, CMB experiments still have a wealth of information to offer beyond near-term facilities regarding the properties of dark matter, inflation, and light relic particles. In particular, a much lower-noise and higher-resolution wide-area CMB survey can cross a number of critical fundamental physics thresholds and open a relatively untapped window of small-scale, late-time CMB anisotropies. Here I will discuss CMB-HD, a next-generation CMB facility with three times lower noise and six times higher resolution than the CMB-S4 wide-area survey, as well as the discoveries it can enable.

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One of ten national laboratories overseen and primarily funded by the Office of Science of the U.S. Department of Energy (DOE), Brookhaven National Laboratory conducts research in the physical, biomedical, and environmental sciences, as well as in energy technologies and national security. Brookhaven Lab also builds and operates major scientific facilities available to university, industry and government researchers. Brookhaven is operated and managed for DOE's Office of Science by Brookhaven Science Associates, a limited-liability company founded by the Research Foundation for the State University of New York on behalf of Stony Brook University, the largest academic user of Laboratory facilities, and Battelle, a nonprofit applied science and technology organization.

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