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arXiv · hep-th/9302114

The covariant scattering and cohomology of $W_3$ strings

Michael Freeman·Peter West
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Abstract

A general formalism for covariant $W_3$ string scattering is given. It is found necessary to use screening charges that are constructed from the $W_3$ fields including ghosts. The scattering amplitudes so constructed contain within them Ising model correlation functions and agree with those found previously by the authors. Using the screening charge and a picture changing operator, an infinite number of states in the cohomology of Q are generated from only three states. We conjecture that, apart from discrete states, these are all the states in the cohomology of Q.

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Michael Freeman, Peter West. 1993-02-24. The covariant scattering and cohomology of $W_3$ strings. https://doi.org/10.1142/s0217751x93001740

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