Speaker: Wojciech Dybalski (Adam Mickiewicz University in Poznań)

Title: Interacting massless infraparticles in 1+1 dimensions

Time/Date: 4:45-6:15pm, December 21 (Tue.), 2021

Room: This will be an online seminar on Zoom. Please ask Kawahigashi for the Zoom link.

Abstract: The Buchholz' scattering theory of waves in two dimensional massless models suggests a natural definition of a scattering amplitude. We computed such a scattering amplitude for charged infraparticles that live in the GNS representation of the 2d massless scalar free field and obtained a non-trivial result. It turns out that these excitations exchange phases, depending on their charges, when they collide. Perspectives for obtaining a similar effect in higher dimensions will also be discussed. The talk is based on a joint work with Jens Mund.