Ward identities and the vanishing theorem for loop amplitudes of the closed N=2 string
High Energy Physics - Theory
2009-10-31 v1
Abstract
The existence of a ground ring of ghost number zero operators in the chiral BRST cohomology of the N=2 string is used to derive an infinite set of Ward identities for the closed-string scattering amplitudes at arbitrary genus. These identities are sufficient to rederive the well known vanishing theorem for loop amplitudes with more than three external legs.
Keywords
Cite
@article{arxiv.hep-th/9912016,
title = {Ward identities and the vanishing theorem for loop amplitudes of the closed N=2 string},
author = {Klaus Junemann and Olaf Lechtenfeld},
journal= {arXiv preprint arXiv:hep-th/9912016},
year = {2009}
}
Comments
12 pages, 2 figures