标量俘获与Saxion宇宙学
Scalar Trapping and Saxion Cosmology
摘要：
详细研究了具有对称性破缺势的热浴中标量场的动力学行为。特别是，我们专注于通过热/非热粒子产生的标量场在增强的对称点捕获的过程中，考虑到所产生的粒子与标准模型粒子的相互作用。作为一个显式的例子，我们重新审视的saxion动力学与初始振幅远大于Peccei-Quinn标度，并表明saxion捕获现象发生在大多数情况下，它往往会导致热膨胀。我们还研究了热膨胀后的介子动力学，结果表明热耗散效应可以缓解介子衰变产生的介子过剩问题。
英文摘要：
We study in detail the dynamics of a scalar field in thermal bath with symmetry breaking potential. In particular, we focus on the process of trapping of a scalar field at an enhanced symmetry point through the thermal/non-thermal particle production, taking into account the interactions of produced particles with the standard model particles. As an explicit example, we revisit the saxion dynamics with an initial amplitude much larger than the Peccei-Quinn scale and show that the saxion trapping phenomenon happens for the most cases and it often leads to thermal inflation. We also study the saxion dynamics after thermal inflation, and it is shown that thermal dissipation effect on the saxion can relax the axion overproduction problem from the saxion decay.
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