Publication: Particle production from axial fields
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1999-02-02
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American Physical Society
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Abstract
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].
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© 1999 The American Physical Society. I thank Ed. Copeland and A. Dobado for useful suggestions. This work has been partially supported by the Ministerio de Educación y Ciencia (Spain) (CICYT AEN96-1634). The author also acknowledges support from SEUID-Royal Society.
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