The BRST Operator for the Large $N=4$ Superconformal Algebra
arXiv:hep-th/9402118 · doi:10.1103/PhysRevD.50.4051
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.
Latex file, 16 pages, NBI-HE-94-10