Lorentz-Covariant Green-Schwarz Superstring Amplitudes
High Energy Physics - Theory
2011-07-19 v1
Abstract
In a recent paper, the BRST formalism for the gauge-fixed N=2 twistor-string was used to calculate Green-Schwarz supersring scattering amplitudes with an arbitrary number of loops and external massless states. Although the gauge-fixing procedure preserved the worldsheet N=2 superconformal invariance of the twistor-string, it broke the target-space SO(9,1) super-Poincar\'e invariance down to an SU(4)xU(1) subgroup. In this paper, generators for the SO(9,1) super-Poincar\'e transformations, as well as manifestly covariant vertex operators, are explicitly constructed out of the gauge-fixed matter fields. The earlier calculated amplitudes are then expressed in manifestly Lorentz-covariant notation.
Cite
@article{arxiv.hep-th/9211025,
title = {Lorentz-Covariant Green-Schwarz Superstring Amplitudes},
author = {Nathan Berkovits},
journal= {arXiv preprint arXiv:hep-th/9211025},
year = {2011}
}
Comments
11 pages plain Tex, KCL-TH-92-6