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Off-shell structure of the string sigma model

Alan Kostelecky, Malcolm Perry, Robertus Potting

hep-tharXiv:hep-th/9912243

Abstract

The off-shell structure of the string sigma model is investigated. In the open bosonic string, nonperturbative effects are shown to depend crucially on the regularization scheme. A scheme retaining the notion of string width reproduces the structure of Witten's string field theory and the associated unconventional gauge transformations.

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