Relativistic quantum mechanics of a Proca (spin-1) particle in Riemannian spacetimes is
constructed. Covariant equations defining electromagnetic interactions of a Proca particle …

The Proca wave equation describes a classical massive spin 1 particle. We analyze the
gravitational interaction of this vector field. In particular, the spherically symmetric solutions …

New clues for the best understanding of the nature of the symmetry-breaking mechanism are
revealed in this paper. A revision of the standard gauge transformation properties of Yang …

A new, configuration-space picture of a formalism of group quantization, the GAQ formalism,
is presented in the context of a previous algebraic generalization. This presentation serves …

The possibility of nontrivial representations of the gauge group on wave functionals of a
gauge invariant quantum field theory leads to a generation of mass for intermediate vector …

The standard gauge theory for internal as well as space-time symmetries is revisited. Then
we propose an extension of the gauge and diffeomorphism symmetry allowing for infinitely …

A model for two-dimensional (2D) quantum gravity is constructed out of the Virasoro group.
To this end the quantization of the abstract Virasoro group is revisited. For the critical values …

The possibility of non-trivial representations of the gauge group on wavefunctionals of a
gauge invariant quantum field theory leads to a generation of mass for intermediate vector …

The implementation of modular invariance on the torus as a phase space at the quantum
level is discussed in a group-theoretical framework. Unlike the classical case, at the …

We study the influence of the gravitational field of Friedmann geometries upon an
electromagnetic potential, through the Proca electromagnetic theory in a Dirac æther. The …