标题： 轴子-SU(2)暴胀中的磁生成 显示英文标题

标题： Magnetogenesis from axion-SU(2) inflation

摘要： 我们描述了一种关于膨胀磁发生的新提议，通过将旁观者色自然膨胀（SCNI）的非阿贝尔部分与标准模型的$\rm{SU(2)}_{\rm L}$部分相匹配。 该机制依赖于在强反作用 regime 中最近发现的 SCNI 吸引子，在此情况下，规范场不会在超视界尺度上衰减，它们的反作用导致滚动轴子场的稳定新轨迹。 超视界尺度的规范场在电弱相变后部分转化为电磁场。 所产生的螺旋磁场的强度和相关长度取决于膨胀时期的哈勃尺度和 SCNI 部分的细节。 对于合适的参数选择，我们表明具有大约$1\, {\rm {Mpc}}$相关长度的磁场强度与解释遥远耀星高能$\gamma$射线光谱所需的星际磁场一致。 显示英文摘要

摘要： We describe a novel proposal for inflationary magnetogenesis by identifying the non-Abelian sector of Spectator Chromo Natural Inflation (SCNI) with the $\rm{SU(2)}_{\rm L}$ sector of the Standard Model. This mechanism relies on the recently discovered attractor of SCNI in the strong backreaction regime, where the gauge fields do not decay on super-horizon scales and their backreaction leads to a stable new trajectory for the rolling axion field. The large super-horizon gauge fields are partly transformed after the electroweak phase transition into electromagnetic fields. The strength and correlation length of the resulting helical magnetic fields depend on the inflationary Hubble scale and the details of the SCNI sector. For suitable parameter choices we show that the strength of the resulting magnetic fields having correlation lengths around $1\, {\rm {Mpc}}$ are consistent with the required intergalactic magnetic fields for explaining the spectra of high energy $\gamma$ rays from distant blazars.