Speaker
Dr
Michael Dütsch
(Universität Göttingen)
Description
Part I. The Higgs mechanism is not needed: this is shown by giving a consistent quantization of massive vector bosons without using the Higgs mechanism.
Part II. Compatibility of the Higgs mechanism with the RG-flow: the Higgs mechanism implies that the prefactors of the various interaction terms are uniquely determined functions of the coupling constant(s) and masses. We investigate whether these functions are stable under the RG-flow. Using the framework of Epstein-Glaser renormalization, we find that the answer is 'no', if the renormalization mass scale(s) are chosen in a way corresponding to the minimal subtraction scheme. This result is derived for the U(1)-Higgs model to 1-loop order.
