Lagrangean Approach to Gauge Symmetries for Mixed Constrained Systems and the Dirac Conjecture

Details Lagrangean Approach to Gauge Symmetries for Mixed Constrained Systems and the Dirac Conjecture Lagrangean Approach to Gauge Symmetries for Mixed Constrained Systems and the Dirac Conjecture

2003-02-26

arxiv.org/abs/hep-th/0302210v1

Physics

High Energy Physics

High Energy Physics - Theory

28 pages, LaTex

Scientific paper

The gauge symmetries of a general dynamical system can be systematically obtained following either a Hamiltonean or a Lagrangean approach. In the former case, these symmetries are generated, according to Dirac's conjecture, by the first class constraints. In the latter approach such local symmetries are reflected in the existence of so called gauge identities. The connection between the two becomes apparent, if one works with a first order Lagrangean formulation. We thereby confirm Dirac's conjecture. Our analysis applies to arbitrary constrained systems with first and second class constraints, and thus extends a previous analysis by one of the authors to such general systems. We illustrate our general results in terms of several examples.

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