RT Journal Article T1 Particle production from axial fields A1 López Maroto, Antonio AB 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]. PB American Physical Society SN 0556-2821 YR 1999 FD 1999-02-02 LK https://hdl.handle.net/20.500.14352/59336 UL https://hdl.handle.net/20.500.14352/59336 LA eng NO [1] N.D. Birrell and P.C.W. Davies, Quantum Fields in Curved Space (Cambridge University Press, Cambridge, England 1982).[2] L. Parker, Phys. Rev. Lett. 21, 562 (1968); Phys. Rev. 183, 1057 (1969); in Asymptotic Structure of Space-Time, edited by F.P. Espósito and L. Witten (Plenum, New York, 1977).[3] F. Cooper, J.M. Eisenberg, Y. Kluger, E. Mottola, and B. Svetisky, Phys. Rev. D 48, 190 (1993).[4] J. Schwinger, Phys. Rev. 82, 664 (1951).[5] M. Gasperini and M. Giovannini, Phys. Rev. D 47, 1519 (1993).[6] J. Garriga and E. Verdaguer, Phys. Rev. D 39, 1072 (1989).[7] E. Brézin and C. Itzykson, Phys. Rev. D 2, 1191 (1970).[8] N. Narozhnyi and A. Nikishov, Sov. J. Nucl. Phys. 11, 596 (1970).[9] Y.B. Zel’dovich and A.A. Starobinski, Pis’ma Zh. Éksp. Teor. Fiz. 26, 373 (1977) [JETP Lett. 26, 252 (1977)].[10] L. Kofman, A. Linde, and A.A. Starobinski, Phys. Rev. D 56, 3258 (1997); Y. Shtanov, J. Traschen, and R. Branderberger, ibid. 51, 5438 (1995).[11] P.B. Greene and L. Kofman, hep-ph/9807339.[12] V.F. Mukhanov, H.A. Feldman, and R.H. Brandenberger, Phys. Rep. 215, 203 (1992).[13] M. Gasperini, M. Giovannini, and G. Veneziano, Phys. Rev. Lett. 75, 3796 (1995).[14] J.B. Hartle and B.L. Hu, Phys. Rev. D 20, 1772 (1979).[15] A. Dobado and A.L. Maroto, gr-qc/9803076.[16] P. van Nieuwenhuizen, Phys. Rep. 68, 189 (1981).[17] M.B. Green, J.H. Schwarz, and E. Witten, Superstring Theory (Cambridge University Press, Cambridge, England, 1987).[18] R.R. Metsaev and A.A. Tseytlin, Nucl. Phys. B293, 92 (1987).[19] E.J. Copeland, A. Lahiri, and D. Wands, Phys. Rev. D 51, 1569 (1995); 50, 4868 (1994); J.D. Barrow and K.E. Kunze, ibid. 55, 623 (1997).[20] A.L. Maroto and I.L. Shapiro, Phys. Lett. B 414, 34 (1997).[21] E. Cartan, C. R. Hebd. Seances Acad. Sci. 174, 593 (1922).[22] R. Utiyama, Phys. Rev. 101, 1597 (1956); T.W.B. Kibble, J. Math. Phys. 2, 212 (1961).[23] I.L. Buchbinder, S.D. Odintsov, and I.L. Shapiro, Effective Action in Quantum Gravity (IOP, Bristol, 1992).[24] A. Dobado and A.L. Maroto, hep-th/9712198.[25] I.L. Buchbinder, S.D. Odintsov, and I.L. Shapiro, Phys. Lett. 162B, 92 (1985).[26] C. Itzykson and J.B. Zuber, Quantum Field Theory (McGraw- Hill, New York, 1980).[27] A. Galindo and P. Pascual, Quantum Mechanics (Springer- Verlag, Berlin, 1991).[28] I.S. Gradshteyn and I.M. Ryzhik, Table of Integrals, Series and Products (Academic, New York, 1980).[29] W. Dittrich and M. Reuter, Effective Lagrangians in Quantum Electrodynamics (Springer-Verlag, Berlin, 1985).[30] A. Dobado and A.L. Maroto, Phys. Rev. D 54, 5185 (1996).[31] T. Kato, Perturbation Theory for Linear Operators (Springer- Verlag, Berlin, 1980).[32] A.L. Maroto and A. Mazumdar, hep-ph/9811288. NO © 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. NO Ministerio de Educación y Ciencia (Spain) NO SEUID-Royal Society DS Docta Complutense RD 1 may 2024