Calendar of Physics Talks Vienna

Gauge Theories: a scientific success story and still a contemporary challenge
Speaker:Prof. Thomas Strobl (Univ. Lyon)
Abstract:We review the basic idea of gauging, including the transition from Maxwell to Yang-Mills theory. This transition is marked by the corresponding one from abelian to non-abelian Lie groups. The introduction of this then-new theory by Yang and Mills in 1954 was crowned on the physics side by a Nobel prize in 1979 (and related ones in 1999 and 2013). In the main part of the talk, we propose to go one step further, replacing the notion of a Lie group by the one of a Lie groupoid. While by now we are already sufficiently used to the notion of Lie groups in physics, the transition from abelian to non-abelian groups is mathematically probably more profound than the one from groups to groupoids. We present a mathematical framework that generalizes Yang-Mills theories to structural Lie groupoids. To find a physically relevant application of this is a challenge for the coming generations
Date: Tue, 09.06.2015
Time: 14:15
Duration: 60 min
Location:Fakultät für Physik, Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock
Contact:H. Steinacker

Towards improved predictions for electroweak vector boson pair production at the LHC
Speaker:Kirill Melnikov (Karlsruhe Institute of Technology)
Abstract:im Rahmen des Teilchenphysikseminars: I will discuss a recent computation of two-loop scattering amplitudes relevant for the description of quark and gluon fusion processes into pairs of electroweak gauge bosons.
Date: Tue, 09.06.2015
Time: 16:15
Duration: 60 min
Location:Fakultät für Physik, Boltzmanngasse 5, Erwin-Schrödinger-Hörsaal, 5. Stock
Contact:A. Hoang, H. Neufeld