Theoriekolloquium
May 24, 2012 at 3:30 p.m. in Newton-Raum, Staudinger Weg 9, 01-122Prof. Dr. P.G.J. van Dongen
Institut für Physik, KOMET 7
peter.vandongen@uni-mainz.de
Jun.-Prof. Dr. J. Marino
Institut für Physik, KOMET 7
jamarino@uni-mainz.de
Two classes of nonperturbative phenomena could occur in the nonlinear sigma models at high energy.
The first is the existence of a nontrivial fixed point for the renormalization group flow, leading to nonperturbative renormalizability (a.k.a. asymptotic safety).
The second is the dominance of classical configurations in high energy scattering, known as classicalization.
Both could lead to unitarization of the scattering amplitudes.
I will discuss both possibilities, emphasizing similarities and differences.