On Physical States in c<1 String Theory

S. Govindarajan

On Physical States in c<1 String Theory

High Energy Physics - Theory 2007-05-23 v1

Authors: S. Govindarajan

Abstract

The BRST cohomology analysis of Lian and Zuckerman leads to physical states at all ghost number for $c<1$ matter coupled to Liouville gravity. We show how these states are related to states at ghost numbers zero(pure vertex operator states -- DK states) and ghost number one(ring elements) by means of descent equations. These descent equations follow from the double cohomology of the String BRST and Felder BRST operators. We briefly discuss how the ring elements allow one to determine all correlation functions on the sphere.

Keywords

ghost fields

Cite

@article{arxiv.hep-th/9209051,
  title  = {On Physical States in c<1 String Theory},
  author = {S. Govindarajan},
  journal= {arXiv preprint arXiv:hep-th/9209051},
  year   = {2007}
}

Comments

9 pages, harvmac, IMSc--92/36. (Talk presented at ICTP Workshop -- July 1991)

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