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Nonlinear Sigma Model for String Solitons

M. Natsuume

hep-tharXiv:hep-th/9206062

Abstract

It is shown that a renormalizable nonlinear sigma model gives rise to the effective string theory proposed by Polchinski and Strominger. In the presence of long string background, the model contains massive world-sheet degrees of freedom owing to the spontaneous breaking of conformal invariance.

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