Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1998-04-06
J.Geom.Phys. 35 (2000) 299-332
Physics
High Energy Physics
High Energy Physics - Theory
50 pages, Plain TeX, no figures, requires AMS font files amssym.def and amssym.tex; historical part of the introduction revise
Scientific paper
We present a detailed algebraic study of the N=2 cohomological set--up describing the balanced topological field theory of Dijkgraaf and Moore. We emphasize the role of N=2 topological supersymmetry and $sl(2,R)$ internal symmetry by a systematic use of superfield techniques and of an $sl(2,R)$ covariant formalism. We provide a definition of N=2 basic and equivariant cohomology, generalizing Dijkgraaf's and Moore's, and of N=2 connection. For a general manifold with a group action, we show that: $i$) the N=2 basic cohomology is isomorphic to the tensor product of the ordinary N=1 basic cohomology and a universal $sl(2,R)$ group theoretic factor: $ii$) the affine spaces of N=2 and N=1 connections are isomorphic.
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