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arXiv · 0906.3371

Decoupling of unphysical states in the minimal pure spinor formalism II

Nathan Berkovits·Joost Hoogeveen·Kostas Skenderis
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Abstract

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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Nathan Berkovits, Joost Hoogeveen, Kostas Skenderis. 2009-06-19. Decoupling of unphysical states in the minimal pure spinor formalism II. https://doi.org/10.1088/1126-6708/2009/09/035

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