Eur. Phys. J. C (2015) 75: 278
https://doi.org/10.1140/epjc/s10052-015-3510-x

Regular Article - Theoretical Physics

Lorentz-violating inflationary magnetogenesis

Dipartimento di Fisica, Università di Bari, 70126, Bari, Italy

^* e-mail: leonardo.campanelli@ba.infn.it

Received: 20 May 2015
Accepted: 8 June 2015
Published online: 23 June 2015

Abstract

A non-conformally invariant coupling between the inflaton and the photon in the minimal Lorentz-violating standard model extension is analyzed. For specific forms of the Lorentz-violating background tensor, the strong-coupling and back-reaction problems of magnetogenesis in de Sitter inflation with scale are evaded, the electromagnetic-induced primordial spectra of (Gaussian and non-Gaussian) scalar and tensor curvature perturbations are compatible with cosmic microwave background observations, and the inflation-produced magnetic field directly accounts for cosmic magnetic fields.