Yw. Kim et Kd. Rothe, LAGRANGIAN APPROACH TO LOCAL SYMMETRIES AND SELF-DUAL MODEL IN GAUGE-INVARIANT FORMULATION, International journal of modern physics A, 13(24), 1998, pp. 4183-4194
Taking the Stuckelberg Lagrangian associated with the Abelian self-dua
l model of P. K. Townsend ct al. as a starting point, we embed this mi
xed first- and second-class system into a pure first-class system by f
ollowing systematically the generalized Hamiltonian approach of Batali
n, Fradkin and Tyutin. The resulting Lagrangian possesses an extended
gauge invariance and provides a nontrivial example for a general Lagra
ngian approach to unravelling the full set of local symmetries of a La
grangian.