ar X iv : h ep - t h / 93 07 06 8 v 1 9 J ul 1 99 3 Axial Currents in Electrodynamics

ar X iv : h ep - t h / 99 06 02 9 v 1 3 J un 1 99 9

ar X iv : h ep - t h / 92 06 05 6 v 2 8 J ul 1 99 3 hep - th / 9206056 UCSBTH – 92 – 22 Revised July 1993 IS PURITY ETERNAL ?

Phenomenological and formal restrictions on the evolution of pure into mixed states are discussed. In particular, it is argued that, if energy is conserved, loss of purity is incompatible with the weakest possible form of Lorentz covariance.

ar X iv : h ep - t h / 06 06 00 8 v 1 1 Ju n 20 06 Feynman problem in the noncommutative case

In the context of the Feynman’s derivation of electrodynamics, we show that noncommutativity allows other particle dynamics than the standard formalism of electrodynamics.

ar X iv : h ep - t h / 99 03 15 8 v 1 1 8 M ar 1 99 9 Symplectic reduction of p - form electrodynamics

We propose a simple method to reduce a general p-form electrodynamics with respect to the standard Gauss constraints. The canonical structure of the reduced theory displays a p-dependent sign which makes the essential difference between theories with different parities of p. This feature was observed recently in the corresponding quantization condition for p-brane dyons. It suggests that these ...

ar X iv : h ep - p h / 98 06 52 3 v 3 4 J ul 1 99 8 IHEP 98 - 21 Model for three generations of fermions

A model is constructed for a chiral abelian gauge-interaction of fermions and a potential of three higgses, so that the potential possesses a discrete symmetry of the vacuum state, which provides the introduction of three generations for the fermions. For the model including charged currents, a matrix of the flavor mixing is described, and a phase giving the violation of CP-invariance is determ...