CPT

Calendar of Physics Talks Vienna

On the 6d Origin of 4d Non-invertible Duality Defects
Speaker:Michele Del Zotto (Uppsala University)
Abstract:It is well-known that six-dimensional superconformal field theories can be exploited to unravel interesting featuresof lower-dimensional field theories obtained via compactifications. In this short note we discuss an application of 6d (2,0) theories to exhibit infinitely many classes of examples of four dimensional theories with Kramers-Wannier-like non-invertible symmetries.
Date: Tue, 31.05.2022
Time: 14:00
Duration: 60 min
Location: Zoom https://univienna.zoom.us/j/69077681292?pwd=Qkgzcy9zWXlaUnh0TWdFMUx5bGp1dz09 ID meeting: 690 7768 1292 Passcode: 866901
Contact:S. Fredenhagen, D. Grumiller, E. Battista, R. Ruzziconi

Spacetime dynamics and integrabile systems
Speaker:Lara Kristiansen (Universidad de Santiago de Chile)
Abstract:It is shown that the Ablowitz-Kaup-Newell-Segur (AKNS) integrable hierarchy can be obtained as the dynamical equations of three-dimensional general relativity with a negative cosmological constant. This geometrization of the AKNS system is possible through the construction of novel boundary conditions for the gravitational field. These are invariant under an asymptotic symmetry group characterized by an infinite set of AKNS commuting conserved charges. Gravitational configurations are studied by means of SL(2, R) conjugacy classes. Conical singularities and black hole solutions are included in the boundary conditions.
Date: Thu, 02.06.2022
Time: 16:30
Duration: 60 min
Location:https://tuwien.zoom.us/j/95002409522
Contact:Iva Lovrekovic, Daniel Grumiller

Dispersive Approach(es) to Hadronic Light-by-Light Scattering for the Muon g-2
Speaker:Jan Luedtke (Univ. Wien)
Abstract:After a general introduction about the up-to-date Standard Model (SM) prediction for the muon g-2 and its comparison against experimental measurements, I will focus on one particularly challenging part of the SM calculation, namely hadronic light-by-light (HLbL) scattering. I will review the essential aspects of an established dispersive approach to HLbL as well as point out difficulties in this framework, especially related to the inclusion of higher-spin intermediate states. I will then introduce a novel dispersive formalism designed to overcome these issues, present its general features and show our first results towards a complete calculation of HLbL in this approach.
Date: Fri, 03.06.2022
Time: 16:15
Duration: 60 min
Location:ERNST MACH Hoersaal, Fakultaet fuer Physik, Boltzmanngasse 5, 2. Stock Zoom: https://univienna.zoom.us/j/93427906843?pwd=YjhSejdUVW16QjVQYUh5TVNSNFNhQT09 Meeting ID: 934 2790 6843 Passcode:
Contact:A. Hoang, M. Procura