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López Maroto, Antonio 2023-06-20T19:09:55Z 2023-06-20T19:09:55Z 1999-02-02 0556-2821 10.1103/PhysRevD.59.063501 https://hdl.handle.net/20.500.14352/59336 http://dx.doi.org/10.1103/PhysRevD.59.063501 http://journals.aps.org/ 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. [S0556-2821(99)04504-X]. eng open access Particle production from axial fields journal article