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18 papers · 2 filters
Influence of a magnetic fluxon on the vacuum energy of quantum fields confined by a bag
S. Leseduarte, August Romeo
We study the simultaneous influence of boundary conditions and external fields on quantum fluctuations by considering vacuum zero-point energies for quantum fields in the presence…
Nambu-Goldstone Fields, Anomalies and WZ Terms
J. Gomis, K. Kamimura, R. Kuriki
We construct the Wess-Zumino terms from anomalies in case of quasigroups for the following situations. One is effective gauge field theories of Nambu-Goldstone fields associated wi…
Ward identities for rigid symmetries of higher order
Friedemann Brandt, Marc Henneaux, André Wilch
Higher order conservation laws, associated with conserved antisymmetric tensors fulfilling , are shown to define rigid s…
Semi-local Cosmic Strings and the Cosmological Constant Problem
Jose Daniel Edelstein
We study the cosmological constant problem in a three-dimensional N=2 supergravity theory with gauge group SU[2]_{global}xU[1]_{local}. The model we consider is known to admit stri…
Equivalence of Faddeev-Jackiw and Dirac approaches for gauge theories
J. Antonio García, Josep M. Pons
The equivalence between the Dirac method and Faddeev-Jackiw analysis for gauge theories is proved. In particular we trace out, in a stage by stage procedure, the standard classific…
Local BRST cohomology in minimal D=4, N=1 supergravity
Friedemann Brandt
The local BRST cohomology is computed in old and new minimal supergravity, including the coupling to Yang-Mills gauge multiplets. This covers the determination of all gauge invaria…