Particle production from axial fields
Abstract
Description
We study the production of massive fermions in arbitrary vector and axial-vector classical backgrounds using effective action techniques. A perturbative calculation shows the different features of each field and in particular it is seen that pure temporal axial fields can produce particles whereas it is not possible for a pure vector background. We also analyze from a non-perturbative point of view a particular configuration with constant electric and axial fields and show that the presence of the axial background inhibits the production from the electric field.
10 pages, 1 figure, RevTeX; minor corrections, version to appear in Phys. Rev. D
10 pages, 1 figure, RevTeX; minor corrections, version to appear in Phys. Rev. D