RT Journal Article T1 Resonant production of fermions in an axial background A1 López Maroto, Antonio A1 Mazumdar, Anupam AB We consider the resonant production of fermions from an oscillating axial background. The classical evolution of the axial field is given by that of a massive pseudovector field, as suggested by the renormalizability of the theory. We look upon both the massive and the massless fermion production from a perturbative point of view. We obtain the corresponding spectrum and angular distributions for the different spins or helicities in the particular case of a spatial-like axial held. We also extend our study to the nonperturbative regime in the massless case and compare the results with the perturbative ones. [S0556-2821(99)04308-8]. PB American Physical Society SN 0556-2821 YR 1999 FD 1999-03-24 LK https://hdl.handle.net/20.500.14352/59335 UL https://hdl.handle.net/20.500.14352/59335 LA eng NO © 1999 The American Physical Society. A.L.M. acknowledges support from SEUID-Royal Society and (CICYT-AEN96-1634) (Spain). A.M. is supported by INLAKS and ORS. We thank Juan García Bellido, Luis Mendes, and Andrew Liddle for valuable discussions. NO SEUID-Royal Society NO CICYT (Spain) DS Docta Complutense RD 21 abr 2025