Low-energy effective action in two-dimensional SQED: A two-loop analysis
High Energy Physics - Theory
2017-09-13 v2
Abstract
We study two-loop quantum corrections to the low-energy effective actions in N=(2,2) and N=(4,4) SQED in the Coulomb branch. In the latter model, the low-energy effective action is described by a generalized Kahler potential which depends on both chiral and twisted chiral superfields. We demonstrate that this generalized Kahler potential is one-loop exact and corresponds to the N=(4,4) sigma-model with torsion presented by Rocek, Schoutens and Sevrin. In the N=(2,2) SQED, the effective Kahler potential is not protected against higher-loop quantum corrections. The two-loop quantum corrections to this potential and the corresponding sigma-model metric are explicitly found.
Cite
@article{arxiv.1704.04148,
title = {Low-energy effective action in two-dimensional SQED: A two-loop analysis},
author = {I. B. Samsonov},
journal= {arXiv preprint arXiv:1704.04148},
year = {2017}
}
Comments
40 pages; v2: references added, typos corrected