The BRST Operator for the Large N=4 Superconformal Algebra
Fiorenzo Bastianelli, Nobuyoshi Ohta
Abstract
We review the detailed structure of the large N=4 superconformal algebra, and construct its BRST operator which constitutes the main object for analyzing N=4 strings. We then derive the general condition for the nilpotency of the BRST operator and show that there exists a line of critical N=4 string theories.
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