Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-07-08
Adv.Theor.Math.Phys. 10 (2006) 713-745
Physics
High Energy Physics
High Energy Physics - Theory
36 pages
Scientific paper
It is suggested that topological membranes play a fundamental role in the recently proposed topological M-theory. We formulate a topological theory of membranes wrapping associative three-cycles in a seven-dimensional target space with G_2 holonomy. The topological BRST rules and BRST invariant action are constructed via the Mathai-Quillen formalism. In a certain gauge we show this theory to be equivalent to a membrane theory with two BRST charges found by Beasley and Witten. We argue that at the quantum level an additional topological term should be included in the action, which measures the contributions of membrane instantons. We construct a set of local and non-local observables for the topological membrane theory. As the BRST cohomology of local operators turns out to be isomorphic to the de Rham cohomology of the G_2 manifold, our observables agree with the spectrum of d=4, N=1 G_2 compactifications of M-theory.
Anguelova Lilia
Medeiros Paul de
Sinkovics Annamaria
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