Effective couplings in N=2 supersymmetric gauge theories

OKC/Nordita High-Energy Physics Theory seminar

Monday 15 February 2016
from 13:15
to 14:15 at
122:026

Speaker :

Vladimir Mitev (Univ. Mainz)

Abstract :

The best studied interacting four dimensional gauge theory is N = 4 Super Yang-Mills and it is important to find ways to apply our understanding of it to other less symmetric theories. Suprisingly, certain quantities in other supersymmetric gauge theories can be obtained by a substitution rule in which one takes the N=4 result and replaces the gauge coupling by an "effective coupling". A crucial question is then to understand to which degree these effective couplings are independent of the observable computed. With this goal in mind, we calculate supersymmetric Wilson loops on the ellipsoid for a large class of N = 2 SCFT using localization. From them we extract the radiation emitted by an accelerating heavy probe quark and the entanglement entropy. Comparing our results with the N = 4 SYM ones, we obtain effective couplings and analyze their universality.