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- W2047744974 abstract "In order to gain new insights into the gauge field couplings in the early universe, we consider the constraints on gauge field production during inflation imposed by requiring that their effect on the CMB anisotropies are subdominant. In particular, we calculate systematically the bispectrum of the primordial curvature perturbation induced by the presence of vector gauge fields during inflation. Using a model independent parametrization in terms of magnetic non-linearity parameters, we calculate for the first time the contribution to the bispectrum from the cross correlation between the inflaton and the magnetic field defined by the gauge field. We then demonstrate that in a very general class of models, the bispectrum induced by the cross correlation between the inflaton and the magnetic field can be dominating compared with the non-Gaussianity induced by magnetic fields when the cross correlation between the magnetic field and the inflaton is ignored." @default.
- W2047744974 created "2016-06-24" @default.
- W2047744974 creator A5085355716 @default.
- W2047744974 creator A5085755546 @default.
- W2047744974 date "2014-07-07" @default.
- W2047744974 modified "2023-10-16" @default.
- W2047744974 title "Constraints on gauge field production during inflation" @default.
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- W2047744974 doi "https://doi.org/10.1088/1475-7516/2014/07/012" @default.
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