标题： 暴胀期间由高斯-博内项引起的对称性破缺/恢复 显示英文标题

标题： Gauss-Bonnet-induced symmetry breaking/restoration during inflation

摘要： 我们提出了一种对称性破缺或恢复的机制，这种机制可能在暴胀中期由于高斯-博内项与带电标量的耦合而发生。 高斯-博内耦合导致带电标量的有效平方质量依赖于暴胀子，这在其对称点附近可能会改变符号。 这可能导致对称性的自发破缺，或者如果初始已破缺，则可能导致其恢复。 我们展示了高斯-博内耦合对暴胀背景的反作用可以忽略的条件，从而使得给定暴胀模型的预测不受对称性破缺/恢复过程的影响。 显示英文摘要

摘要： We propose a mechanism of symmetry breaking or restoration that can occur in the middle of inflation due to the coupling of the Gauss-Bonnet term to a charged scalar. The Gauss-Bonnet coupling results in an inflaton-dependent effective squared mass of the charged scalar, which can change its sign (around the symmetric point) during inflation. This can lead to spontaneous breaking of the symmetry, or to its restoration, if it is initially broken. We show the conditions under which the backreaction of the Gauss-Bonnet coupling on the inflationary background is negligible, such that the predictions of a given inflationary model are unaffected by the symmetry breaking/restoration process.