Speaker :
 Prof. Laurent Baulieu (LPTHE UPMCSorbonne Universites and Max Planck Institut fur Gravitationsphysik Albert Einstein Institut) 
Title :

Twisted representations for N=1 SUSY theories, including supergravity 
Time :
 20170428 (Fri) 10:30 
Place : 
Seminar Room 722, Institute of Mathematics (NTU Campus) 
Abstract: 
Building and renormalizing superYangMills theories is a subtle issue. One must understand the right way of preserving both supersymmetry and gauge invariance, since no regularisation that preserves both supersymmetry and gauge invariance has been found so far. The notion of twisting a supersymmetry algebra is very useful to understand (i) its structure and (ii) the properties of the corresponding quantum field theory. We show how the technique of twisting supersymmetry algebra allows one to explore in details the structure and the renormalisation properties of the N=4 d=4 superYangâ€“Mills theory, as well as some interesting properties of supergravity. 