Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-12-06
Physics
High Energy Physics
High Energy Physics - Theory
15 pages, Revtex, 5 ps-figures. A new version, greatly improved of hep-th/9710216 . v2: Replaced by an expanded and substantia
Scientific paper
The classical electromagnetic field of a spinless point electron is described in a formalism with extended causality by discrete finite point-vector fields with discrete and localized point interactions. These fields are taken as a classical representation of photons, "classical photons". They are all transversal photons; there are no scalar nor longitudinal photons and the Lorentz gauge condition is automatically satisfied. The angular distribution of emitted photons reproduces the directions of maximum emission of the standard formalism. The Maxwell formalism in terms of continuous and distributed fields is retrieved by the smearing of these discrete fields over the light-cone, and in this process scalar and longitudinal photons are necessarily created and added. Divergences and singularities are by-products of this averaging process. The discrete and the continuous formalisms are not equivalent. The discrete one is superior for not having divergencies, singularities, unphysical degrees of freedom, for describing processes of creation and annihilation of particles instead of advanced solutions, for having a natural explanation for the photon, and for generating the continuous formalism as an effective one. It enlightens the meaning and the origin of the non-physical photons in the standard formalism. The standard theory based on average continuous fields is more convenient and appropriate for dealing with a large number of charges and for relatively large distances, but for few charges or for the field configuration in a charge close neighborhood the discrete field description is mandatorily required for avoiding inconsistencies.
Costa Jair V.
de Souza Manoelito M.
Pedra Adriano S.
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