Physics Colloquium of 24 September 2024

"Theory of Cosmic Ray and Atmospheric Neutrinos"
Mary Hall Reno, University of Iowa

Cosmic ray experiments and neutrino telescopes investigate particle physics interactions at energies exceeding those achieved at the Large Hadron Collider. This talk will explore how particle physics experiments contribute to modeling interaction processes in the atmosphere. We will discuss the connections between cosmic ray interactions and atmospheric neutrino production, as well as their implications for collider experiments. Additionally, we will address neutrino interactions relevant to neutrino telescopes and examine prospects for neutrino cross-section measurements. We will also review deficiencies in modeling air shower interactions, specifically the challenges posed by the "muon puzzle."

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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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