Special Issue: Selected Papers of Workshop in Memory of Sakata. Part 2No Access
Large-scale magnetic fields, non-Gaussianity, and gravitational waves from inflation
https://doi.org/10.1142/S0217751X17470212Cited by:0 (Source: Crossref)
Abstract
We explore the generation of large-scale magnetic fields in the so-called moduli inflation. The hypercharge electromagnetic fields couple to not only a scalar field but also a pseudoscalar one, so that the conformal invariance of the hypercharge electromagnetic fields can be broken. We explicitly analyze the strength of the magnetic fields on the Hubble horizon scale at the present time, the local non-Gaussianity of the curvature perturbations originating from the massive gauge fields, and the tensor-to-scalar ratio of the density perturbations. As a consequence, we find that the local non-Gaussianity and the tensor-to-scalar ratio are compatible with the recent Planck results.
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