Covariant Quantization of Superstrings Without Pure Spinor Constraints
High Energy Physics - Theory
2009-11-07 v1
Abstract
We construct a covariant quantum superstring, extending Berkovits' approach by introducing new ghosts to relax the pure spinor constraints. The central charge of the underlying Kac-Moody algebra, which would lead to an anomaly in the BRST charge, is treated as a new generator with a new b-c system. We construct a nilpotent BRST current, an anomalous ghost current and an anomaly-free energy-momentum tensor. For open superstrings, we find the correct massless spectrum. In addition, we construct a Lorentz invariant B-field to be used for the computation of the integrated vertex operators and amplitudes.
Cite
@article{arxiv.hep-th/0112162,
title = {Covariant Quantization of Superstrings Without Pure Spinor Constraints},
author = {P. A. Grassi and G. Policastro and M. Porrati and P. van Nieuwenhuizen},
journal= {arXiv preprint arXiv:hep-th/0112162},
year = {2009}
}
Comments
30 pages