Interacting strings on AdS_3

Carmen N\'u\~nez; Gast\'on Giribet

Interacting strings on AdS₃

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arxiv hep-th/9909149 v2 pith:ANOYMDPB submitted 1999-09-21 hep-th

Interacting strings on AdS₃

Gast\'on Giribet , Carmen N\'u\~nez This is my paper

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keywords statesamplitudesanalysedconditionsconsidercorrespondingexaminedexcited

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We consider string theory on AdS_3 in terms of the Wakimoto free field representation. The scattering amplitudes for N unitary tachyons are analysed in the factorization limit and the poles corresponding to the mass-shell conditions for physical states are extracted. The vertex operators for excited levels are obtained from the residues and their properties are examined. Negative norm states are found at the second mass level.

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On AdS3×S3×S3×S1, a Wilson-line deformation of the Spin(16)×Spin(16)⋊Z2 heterotic string produces a level-matched tachyon, so the classical moduli space contains unstable regions.