论文标题
宇宙磁场的进展
Progress on Cosmological Magnetic Fields
论文作者
论文摘要
各种观察结果在纳米高斯级别上施加了上限，在磁场上是在半乳酸间尺度上相干的，而Blazar观察结果表明下限$ \ sim 10^{ - 16} $高斯。这样的磁场可以发挥重要的天体物理作用，例如在宇宙重组和结构形成期间，还为早期宇宙中的粒子物理提供了关键信息。具有明显能量密度的磁场可能是在Electroweak相跃迁上产生的。然而，早期宇宙中亚匹马尺度上产生的磁场的演变和存活取决于与违反基本粒子相互作用中对称性的磁性螺旋性。磁性螺旋性的产生需要新的CP违反相互作用，通过加速器实验可以通过希格斯粒子的衰减通道进行测试。
A variety of observations impose upper limits at the nano Gauss level on magnetic fields that are coherent on inter-galactic scales while blazar observations indicate a lower bound $\sim 10^{-16}$ Gauss. Such magnetic fields can play an important astrophysical role, for example at cosmic recombination and during structure formation, and also provide crucial information for particle physics in the early universe. Magnetic fields with significant energy density could have been produced at the electroweak phase transition. The evolution and survival of magnetic fields produced on sub-horizon scales in the early universe, however, depends on the magnetic helicity which is related to violation of symmetries in fundamental particle interactions. The generation of magnetic helicity requires new CP violating interactions that can be tested by accelerator experiments via decay channels of the Higgs particle.
