Aldrovandi A, R. [UNESP]2014-05-272014-05-271991-12-01Journal of Mathematical Physics, v. 32, n. 9, p. 2503-2512, 1991.0022-2488http://hdl.handle.net/11449/64166A scheme inspired in Lie algebra extensions is introduced that enlarges gauge models to allow some coupling between space-time and gauge space. Everything may be written in terms of a generalized covariant derivative including usual differential plus purely algebraic terms. A noncovariant vacuum appears, introducing a natural symmetry breaking, but currents satisfy conservation laws alike those found in gauge theories. © 1991 American Institute of Physics.2503-2512engArtigo10.1063/1.529144Acesso restrito2-s2.0-00024013802-s2.0-0002401380.pdf