Publicação: Decoupling of unphysical states in the minimal pure spinor formalism II
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2009-09-01
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Int School Advanced Studies
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This is the second of a series of two papers where decoupling of unphysical states in the minimal pure spinor formalism is investigated. The multi-loop amplitude prescription for the minimal pure spinor superstring formulated in hep-th/0406055 involves the insertion of picture changing operators in the path integral. In the first paper it was shown that these operators are not BRST closed inside correlators. Therefore a new proof of decoupling of BRST exact states is needed. In this paper we present such a proof, which applies to arbitrary genus. It relies in part on a (previously unnoticed) invariance of the path integral measure.
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Journal of High Energy Physics. Trieste: Int School Advanced Studies, n. 9, p. 14, 2009.
