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UNITARITY OF NONCOMMUTATIVE FIELD THEORIES FROM STRING THEORY.
- Source :
-
Modern Physics Letters A . 11/20/2003, Vol. 18 Issue 33-35, p2525-2532. 8p. - Publication Year :
- 2003
-
Abstract
- We improve the study of the lack of perturbative unitarity of noncommutative space-time quantum field theories derived from open string theory in electric backgrounds, enforcing the universality of the mechanism by which a tachyonic branch cut appears when the Seiberg-Witten limit freezes the string in an unstable vacuum. The main example is realized in the context of the on-shell four-tachyon amplitude of the bosonic string, and the dependence of the phenomenon on the brane-worldvolume dimension is analysed. We discuss the possibility of a proof in superstring theory, and finally mention the NCOS limit in this framework. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02177323
- Volume :
- 18
- Issue :
- 33-35
- Database :
- Academic Search Index
- Journal :
- Modern Physics Letters A
- Publication Type :
- Academic Journal
- Accession number :
- 11810730
- Full Text :
- https://doi.org/10.1142/S0217732303012775