Cornell University

Department of Physics Colloquium - Cooper Lecture - Professor Masha Baryakhtar

Monday, April 15, 2024 at 4:00pm to 5:00pm

Rockefeller Hall, 201, Schwartz Auditorium
Central Campus

General Physics Colloquium and Cooper Lecture, Professor Masha Baryakhtar, University of Washington

Title:  Ultralight Particles Across the Spectra

Host:  Maxim Perelstein

Abstract:  Theories that seek to explain the outstanding puzzles of the Standard Model of particle physics often predict ultralight, feebly-interacting particles. In this talk, I will outline a range of novel search strategies that are required for their discovery, from the laboratory to the sky. I will first focus on the early universe, where even a small trace of ultralight scalar fields can be observed through the power of the cosmic microwave background. Second, I will discuss how rotating black holes source exponentially large numbers of gravitationally-bound bosons, creating nature's laboratories for ultralight particles. These systems emit gravitational waves, allowing observatories such as LIGO to search for new particles. In the case of particles known as dark photons, the resulting system appears as a novel multimessenger source in the sky. 

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Event Type



CHESS, LASSP, Applied and Engineering Physics, Astronomy, Physics, LEPP, CLASSE

University Themes



cascal, physics, WIP


Contact E-Mail

Contact Name

Sue Sullivan


Prof. Masha Baryakhtar

Speaker Affiliation

University of Washington

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