Large-scale gauge spectra and pseudoscalar couplings

Abstract

It is shown that the slopes of the superhorizon hypermagnetic spectra produced by the variation of the gauge couplings are practically unaffected by the relative strength of the parity-breaking terms. A new method is proposed for the estimate of the gauge power spectra in the presence of pseudoscalar interactions during inflation. To corroborate the general results, various concrete examples are explicitly analyzed. Since the large-scale gauge spectra also determine the late-time magnetic fields it turns out that the pseudoscalar contributions have little impact on the magnetogenesis requirement. Conversely the parity-breaking terms crucially affect the gyrotropic spectra that may seed, in certain models, the baryon asymmetry of the Universe. In the most interesting regions of the parameter space the modes reentering prior to symmetry breaking lead to a sufficiently large baryon asymmetry while the magnetic power spectra associated with the modes reentering after symmetry breaking may even be of the order of a few hundredths of a nG over typical length scales comparable with the Mpc prior to the collapse of the protogalaxy. From the viewpoint of the effective field theory description of magnetogenesis scenarios these considerations hold generically for the whole class of inflationary models where the inflaton is not constrained by any underlying symmetry.

46 pages, 7 figures; to appear in Phys. Rev. D

References in corpus (21)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Effective Field Theory for Inflation
• Magnetic fields from inflation?
• The Refractive Index of Curved Spacetime: the Fate of Causality in QED
• Universal upper limit on inflation energy scale from cosmic magnetic field
• Hypermagnetic Baryogenesis
• On the health of a vector field with (R A^2)/6 coupling to gravity
• Inflationary magnetogenesis with reheating phase from higher curvature coupling
• The interrelation between the generation of large-scale electric fields and that of large-scale magnetic fields during inflation
• Universal Gates via Fusion and Measurement Operations on SU$(2{)}_4$ Anyons
• Effective Theory of Inflationary Magnetogenesis and Constraints on Reheating
• Magnetogenesis in bouncing cosmology
• Primordial Magnetogenesis in a Bouncing Universe
• Magnetogenesis and the primordial non-gaussianity
• Inflationary dynamics of kinetically-coupled gauge fields
• Anomalous magnetohydrodynamics in the extreme relativistic domain
• Gradient expansion formalism for magnetogenesis in the kinetic coupling model
• Generation of large scale magnetic fields by coupling to curvature and dilaton field
• Baryogenesis, magnetogenesis and the strength of anomalous interactions
• Polarized backgrounds of relic gravitons
• Effective field theories and inflationary magnetogenesis

Cited by in corpus (7)

• Hypermagnetogenesis from axion inflation: Model-independent estimates
• On the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
• Primordial Helical Magnetic Fields from Inflation?
• Circumventing the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
• Super-horizon resonant magnetogenesis during inflation
• The scaling of primordial gauge fields
• The hypermagnetic power spectra and the phases of Sakharov oscillations