Department of Physics Papers
Document Type
Journal Article
Date of this Version
2-1989
Publication Source
Physical Review Letters
Volume
62
Start Page
993
Last Page
996
DOI
10.1103/PhysRevLett.62.993
Abstract
We provide a very simple prescription for inserting an arbitrary state into a string amplitude. The corresponding string measure is defined without any additional information whenever the state is Becchi-Rouet-Stora-Tyutin (BRST) invariant, generalizing the usual physical conditions. In particular no world-sheet metric is needed. We recover and interpret in a simple way the b^ prescription of Polchinski and explain geometrically how it secures the decoupling of BRST spurious states.
Recommended Citation
Nelson, P. C. (1989). Covariant Insertions of General Vertex Operators. Physical Review Letters, 62 993-996. http://dx.doi.org/10.1103/PhysRevLett.62.993
Date Posted: 01 May 2017
This document has been peer reviewed.