电弱相变附近的修正磁流体力学
Modified Magnetohydrodynamics Around the Electroweak Transition
摘要：
我们分析的解决方案的磁流体动力学方程周围的电弱过渡考虑到手征异常的影响。结果表明，一个过渡，不是一阶有直接的后果之间的不对称性的演变左手和右手轻子。假设在高于转变温度的温度下在对称相中存在初始手性不对称性，以及存在磁场，证明了不对称性通常随时间增长，直到它在转变时经历快速降低，然后最终在较低温度下在断裂相中得到阻尼。我们认为，它是不太可能有任何显着的磁场放大的结果，在标准模型的电弱跃迁，即使手征异常被引入。左手和右手电荷载流子之间的手性不对称性的存在自然导致从非螺旋场产生螺旋磁场，并且这可以对它们随后的演变产生影响。
英文摘要：
We analyse solutions of the MHD equations around the electroweak transition taking into account the effects of the chiral anomaly. It is shown that a transition that is not of the first order has direct consequences on the evolution of the asymmetry between left- and right-handed leptons. Assuming an initial chiral asymmetry in the symmetric phase at temperatures higher than the transition temperature, as well as the existence of magnetic fields, it is demonstrated that the asymmetry typically grows with time, until it undergoes a fast decrease at the transition, and then eventually gets damped at lower temperatures in the broken phase. We argue that it is unlikely to have any significant magnetic field amplification as a consequence of the electroweak transition in the Standard model, even when the chiral anomaly is introduced. The presence of a chiral asymmetry between left- and right-handed charge carriers naturally leads to the creation of helical magnetic fields from non-helical fields and this can have consequences on their subsequent evolution.
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