ep - t h / 93 02 11 4 v 1 2 4 Fe b 19 93 KCL - TH - 93 - 2 THE COVARIANT SCATTERING AND COHOMOLOGY OF W 3 STRINGS
نویسنده
چکیده
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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