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Unitarity of noncommutative field theories from string theory

Torrielli, A (2003) Unitarity of noncommutative field theories from string theory In: Conference on Spacetime and Fundamental Interactions: Quantum Aspects (In honor of A.P. Balachandran's 65th Birthday), 2003-05-26 - ?, Vietri sul Mare, Italy.

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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.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions : Faculty of Engineering and Physical Sciences > Mathematics
Authors :
Date : 2003
DOI : 10.1142/S0217732303012775
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:17
Last Modified : 10 Jun 2019 14:21

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