Correlation functions from two-dimensional string Ward identities

Details Correlation functions from two-dimensional string Ward identities Correlation functions from two-dimensional string Ward identities

1992-04-16

arxiv.org/abs/hep-th/9204052v1

Nucl.Phys. B393 (1993) 261-279

Physics

High Energy Physics

High Energy Physics - Theory

19 pages

Scientific paper

10.1016/0550-3213(93)90245-K

We rederive the $w_\infty$ Ward identities, starting from the existence of trivial linearized gauge invariances, and using the method of canceled propagators in the operator formalism. Recursion relations for certain classes of correlation functions are derived, and these correlation function are calculated exactly. We clarify the relation of these results with another derivation of the Ward identities, which relies directly on charge conservation. We also emphasize the importance of the kinematics of canceled propagators in ensuring that the Ward identities are non-trivial. Finally, we sketch an extension of Ward identities to open strings.

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