Comments on Chern-Simons Contact Terms in Three Dimensions
High Energy Physics - Theory
2015-06-05 v2
Abstract
We study contact terms of conserved currents and the energy-momentum tensor in three-dimensional quantum field theory. They are associated with Chern-Simons terms for background fields. While the integer parts of these contact terms are ambiguous, their fractional parts are meaningful physical observables. In N=2 supersymmetric theories with a U(1)_R symmetry some of these observables lead to an anomaly. Moreover, they can be computed exactly using localization, leading to new tests of dualities.
Cite
@article{arxiv.1206.5218,
title = {Comments on Chern-Simons Contact Terms in Three Dimensions},
author = {Cyril Closset and Thomas T. Dumitrescu and Guido Festuccia and Zohar Komargodski and Nathan Seiberg},
journal= {arXiv preprint arXiv:1206.5218},
year = {2015}
}
Comments
37 pages, 3 figures; minor changes