Triangle Seminars
Tuesday, 19 Nov 2019
TBA
Lorenzo Bianchi
Making sense of a non-Hermitian Lagrangian in Field Theory
Jean Alexandre
(King's)
Abstract:
Motivated by extending the parameter space of the Standard Model of Particle Physics, I will describe how to understand the effects of an imaginary mixing mass term in a non-Hermitian but PT-symmetric extension of scalar QED. The classical theory is already not trivial, and requires a new interpretation of the equations of motion, Noether's theorem and gauge invariance. The path integral can be defined with appropriate field variables, and a consistent picture emerges, opening the way for potential alternative descriptions of the Higgs sector.
Motivated by extending the parameter space of the Standard Model of Particle Physics, I will describe how to understand the effects of an imaginary mixing mass term in a non-Hermitian but PT-symmetric extension of scalar QED. The classical theory is already not trivial, and requires a new interpretation of the equations of motion, Noether's theorem and gauge invariance. The path integral can be defined with appropriate field variables, and a consistent picture emerges, opening the way for potential alternative descriptions of the Higgs sector.
Posted by: CityU2
Wednesday, 20 Nov 2019
TBA
Chiara Toldo
(Ecole Polytechnique)
5d Gauge Theories, SCFTs and Dualities
Sakura Schafer-Nameki
(Oxford)
Abstract:
I will discuss recent developments in constructions of 5d N=1 supersymmetric gauge theories and their UV fixed points, which are strongly-coupled SCFTs. The lectures will start with some background on 5d gauge theories, their Coulomb branch and effective action, as well as their constructions in M-theory on non-compact Calabi-Yau threefolds. In the second lecture I will discuss some new developments of various groups in the past year.
I will discuss recent developments in constructions of 5d N=1 supersymmetric gauge theories and their UV fixed points, which are strongly-coupled SCFTs. The lectures will start with some background on 5d gauge theories, their Coulomb branch and effective action, as well as their constructions in M-theory on non-compact Calabi-Yau threefolds. In the second lecture I will discuss some new developments of various groups in the past year.
Posted by: CityU2
Thursday, 21 Nov 2019
Conformal symmetry in strong interactions
Vladimir Braun
(Universitaet Regensburg)
Abstract:
Description:I will give a review of recent applications of conformal symmetry to perturbative calculations in Quantum Chromodynamics (QCD) by nexploiting the connection of physical theory to QCD at non-intege number of space-time dimensions at the critical point.
Description:I will give a review of recent applications of conformal symmetry to perturbative calculations in Quantum Chromodynamics (QCD) by nexploiting the connection of physical theory to QCD at non-intege number of space-time dimensions at the critical point.
Posted by: QMW