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9 papers · 2 filters
Closed N=2 Strings: Picture-Changing, Hidden Symmetries and SDG Hierarchy
Olaf Lechtenfeld, Alexander D. Popov
We study the action of picture-changing and spectral flow operators on a ground ring of ghost number zero operators in the chiral BRST cohomology of the closed N=2 string and descr…
Ward identities and the vanishing theorem for loop amplitudes of the closed N=2 string
Klaus Junemann, Olaf Lechtenfeld
The existence of a ground ring of ghost number zero operators in the chiral BRST cohomology of the N=2 string is used to derive an infinite set of Ward identities for the closed-st…
Exotic Gauge Theories from Tensor Calculus
Friedemann Brandt, Joan Simon, Ulrich Theis
We construct non-standard interactions between exterior form gauge fields by gauging a particular global symmetry of the Einstein-Maxwell action for such fields. Furthermore we dis…
Exact low-energy effective actions for hypermultiplets in four dimensions
Sergei V. Ketov
We consider the general hypermultiplet Low-Energy Effective Action (LEEA) that may appear in quantized, four-dimensional, N=2 supersymmetric, gauge theories, e.g. in the Coulomb an…
Holomorphic Analogs of Topological Gauge Theories
Alexander D. Popov
We introduce a new class of gauge field theories in any complex dimension, based on algebra-valued (p,q)-forms on complex n-manifolds. These theories are holomorphic analogs of the…
Exact hypermultiplet dynamics in four dimensions
Sergei V. Ketov
We use N=2 harmonic and projective superspaces to formulate the most general `Ansatz' for the SU(2)_R invariant hypermultiplet low-energy effective action (LEEA) in four dimensions…