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.

中文翻译：

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大规模规范谱和伪标量耦合

结果表明，由规范耦合变化产生的超地平线超磁谱的斜率实际上不受奇偶校验项的相对强度的影响。提出了一种在膨胀期间存在伪标量相互作用的情况下估计规范功率谱的新方法。为了证实一般结果，明确分析了各种具体例子。由于大尺度规范谱也决定了后期磁场，因此伪标量贡献对磁发生要求几乎没有影响。相反，打破奇偶校验的术语对回旋光谱产生至关重要的影响，在某些模型中，这可能会导致宇宙的重子不对称。在参数空间中最有趣的区域，在对称破坏之前重新进入的模式导致足够大的重子不对称性，而与对称破坏之后重新进入的模式相关的磁功率谱在典型的长度尺度上甚至可能是几个 nG 的数量级，与之前的 Mpc 相当原星系的坍塌。从磁发生情景的有效场论描述的角度来看，这些考虑一般适用于所有类型的暴胀模型，其中暴胀子不受任何潜在对称性的约束。