Marieke van Beest (SCGP), Monopoles, Scattering and Generalized Symmetries

Tuesday 5 Sept 2023, 11:00 → 12:30 Europe/Stockholm

Albano 3: 6335 - Hekto (10 seats) (Albano Building 3)

I will discuss the problem of electrically charged, massless fermions scattering off magnetic monopoles. The interpretation of the outgoing states has long been a puzzle, as they can carry fractional quantum numbers. We argue that such outgoing particles live in the twisted sector of a topological co-dimension 1 surface, which ends on the monopole. This surface is in general noninvertible, and as such the outgoing radiation not only carries unconventional flavor quantum numbers, but is trailed by a topological field theory, which is a new prediction.