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March 14, 2019 | 3:30 p.m. - 4:30 p.m.
Category: Seminar
Location: Physics & Astronomy Department - Liberal Arts and Sciences #312 | Map
666 W. Hancock
Detroit, MI 48201
Cost: Free
Audience: Academic Staff, Current Graduate Students, Current Undergraduate Students, Faculty

Title: New directions in self-interacting dark matter, from astrophysics to the lattice

Speaker: Sean Tulin (York University)

Abstract: Dark matter may have its own dark forces and interactions that are distinct from the Standard Model and unrelated the weak scale. To test this idea, galaxies and clusters of galaxies serve as cosmic colliders for measuring self-scattering among dark matter particles. Present constraints imply that if self-interactions are to solve the infamous core-cusp problem in dwarf galaxies, the scattering cross section must fall with energy/velocity to avoid cluster limits. To test this velocity dependence, I present new constraints on dark matter self-interactions at an intermediate scale with groups of galaxies. I also describe using mock observations from N-body simulations of self-interacting dark matter with baryons as a test of our methods. Lastly, I describe some recent work toward strongly-coupled theories of self-interacting dark matter, using tools borrowed from lattice QCD to compute its properties nonperturbatively.

For more information about this event, please contact James Osborne at (313) 577-1409 or