TOPOLOGICAL CONFORMAL ALGEBRA AND BRST ALGEBRA IN NONCRITICAL STRING THEORIES

被引:9
作者
FUJIKAWA, K [1 ]
SUZUKI, H [1 ]
机构
[1] HIROSHIMA UNIV,DEPT PHYS,HIROSHIMA 730,JAPAN
关键词
D O I
10.1016/0550-3213(91)90272-Y
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
The operator algebra in non-critical string theories is studied by treating the cosmological term as a perturbation. The algebra of covariantly regularized BRST and related currents contains a twisted N = 2 superconformal algebra only at d = - 2 in bosonic strings, and a twisted N = 3 superconformal algebra only at d = +/- infinity in spinning strings. The bosonic string at d = -2 is examined by replacing the string coordinate by a fermionic matter with c = -2. The resulting bc-beta-gamma-system accommodates various forms of BRST cohomology, and the ghost number assignment and BRST cohomology are different in the c = -2 string theory and two-dimensional topological gravity.
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页码:539 / 554
页数:16
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