KCL-TH-93-14 hep-th/9312010 PARAFERMIONS, W STRINGS AND THEIR BRST CHARGES
نویسنده
چکیده
We show how to relate the parafermions that occur in the W 3 string to the standard construction of parafermions. This result is then used to show that one of the screening charges that occurs in parafermionic theories is precisely the non-trivial part of the W 3 string BRST charge. A way of generalizing this pattern for a W N string is explained. This enables us to construct the full BRST charge for a W 2,N string and to prove the relation of such a string to the algebra W N−1 for arbitrary N , We also show how to calculate part of the BRST charge for a W N string, and we explain how our method might be extended to obtain the full BRST charge for such a string.
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