ar X iv : h ep - t h / 95 11 08 1 v 1 1 3 N ov 1 99 5 Antibrackets and non - Abelian equivariant cohomology

ar X iv : h ep - t h / 94 03 12 6 v 1 2 1 M ar 1 99 4 UU - ITP 01 / 94 HU - TFT - 93 - 65 hep -

The structure of equivariant cohomology in non-abelian localization formulas and topological field theories is discussed. Equivariance is formulated in terms of a nilpotent BRST symmetry, and another nilpotent operator which restricts the BRST cohomology onto the equivariant, or basic sector. A superfield formulation is presented and connections to reducible (BFV) quantization of topological Ya...

ar X iv : h ep - t h / 98 11 08 5 v 1 9 N ov 1 99 8 Vortex Solutions in the Chern - Simons Stuekelberg Model

ar X iv : h ep - t h / 93 11 07 1 v 1 1 1 N ov 1 99 3 COVARIANT QUANTIZATION OF GREEN SCHWARZ SUPERSTRING

We describe a canonical covariant approach to the quantization of the Green-Schwarz superstring. The approach is first applied to the canonical covariant quantization of the Brink and Schwarz superparticle. The Kallosh action is obtained in this case, with the correct BRST cohomology.

ar X iv : h ep - t h / 97 11 09 5 v 1 1 3 N ov 1 99 7 Vacuum Nodes in QCD at θ = π : Exact Results

We show that the vacuum functional of 3+1 dimensional non-abelian gauge theories vanishes for some classical field configurations ψ 0 (A) = 0 when the coefficient of the CP violating θ–term becomes θ = π (mod. 2π). Some of these classical configurations are explicitly identified and include sphalerons. The results shed new light into the non-perturbative behavior of non-abelian gauge theories a...

ar X iv : h ep - t h / 95 11 05 1 v 1 7 N ov 1 99 5 Threshhold Singularities and the Magnetic Mass in Hot QCD ∗

We discuss the recently devised one-loop gap equation for the magnetic mass of hot QCD. An alternative, and one would hope equivalent, gap equation is presented, which however shows no mass generation at the one-loop level.