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Cutting rules and perturbative unitarity of noncommutative electric-type field theories from string theory

Torrielli, A (2003) Cutting rules and perturbative unitarity of noncommutative electric-type field theories from string theory Phys.Rev. D, 67. 086010 - ?.

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Abstract

We discuss the breakdown of perturbative unitarity of noncommutative quantum field theories in electric-type background in the light of string theory. We consider the analytic structure of string loop two-point functions using a suitable off-shell continuation and then study the zero slope limit of Seiberg and Witten. In this way we pick up how the unphysical tachyonic branch cut appears in the noncommutative field theory. We briefly discuss discontinuities and cutting rules for the full string theory amplitude and relate them to the noncommutative field theoretical results, and also discuss the insight one gains into the magnetic case too.

Item Type: Article
Additional Information: Copyright 2003 The American Physical Society
Related URLs:
Divisions: Faculty of Engineering and Physical Sciences > Mathematics
Depositing User: Symplectic Elements
Date Deposited: 27 Jan 2012 12:25
Last Modified: 23 Sep 2013 18:57
URI: http://epubs.surrey.ac.uk/id/eprint/72382

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