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21 papers · 2 filters
Chiral BRST Cohomology of N=2 Strings at Arbitrary Ghost and Picture Number
Klaus Junemann, Olaf Lechtenfeld
We compute the BRST cohomology of the holomorphic part of the N=2 string at arbitrary ghost and picture number. We confirm the expectation that the relative cohomology at non-zero…
The hypermultiplet low-energy effective action, N=2 supersymmetry breaking and confinement
Sergei V. Ketov
Some exact solutions to the hypermultiplet low-energy effective action in N=2 supersymmetric four-dimensional gauge field theories with massive `quark' hypermultiplets are discusse…
An action of N=8 self-dual supergravity in ultra-hyperbolic harmonic superspace
Sinisa Karnas, Sergei V. Ketov
The N-extended self-dual supergravity in the ultra-hyperbolic four-dimensional spacetime of kleinian signature (2+2) is given in the N-extended harmonic superspace. We reformulate…
Extended Self-Dual Yang-Mills from the N=2 String
Chandrashekar Devchand, Olaf Lechtenfeld
We show that the physical degrees of freedom of the critical open string with N=2 superconformal symmetry on the worldsheet are described by a self-dual Yang-Mills field on a hyper…
On exact solutions to quantum N=2 gauge theories
Sergei V. Ketov
Exact solutions to the low-energy effective action of the four-dimensional, N=2 supersymmetric gauge theories with matter (including N=2 super-QCD) are discussed from the three dif…
On the D = 4, N = 2 Non-Renormalization Theorem
Ioseph L. Buchbinder, Sergei M. Kuzenko, Burt A. Ovrut
Using the harmonic superspace background field formulation for general D=4, N=2 super Yang-Mills theories, with matter hypermultiplets in arbitrary representations of the gauge gro…