Decay of Color Gauge Fields in Heavy Ion Collisions and Nielsen-Olesen Instability
Decay of Color Gauge Fields in Heavy Ion Collisions and Nielsen-Olesen Instability
复制标题
重离子碰撞中色规场的衰减和尼尔森-奥尔森不稳定性
DOI：
10.1143/ptp.121.809
复制
发表时间：
2008
影响因子：
--
通讯作者：
A. Iwazaki
中科院分区：
文献类型：
--
作者：
A. Iwazaki
本文利用一个简单的模型，在有效均匀的纵向色电场和磁场的作用下，分析了高能重离子碰撞产生的玻璃体中的不稳定模的行为。在均匀纵向规范场下，不稳定模近似描述为Nielsen-Olesen不稳定模。我们发现Nielsen-Olesen不稳定模的性质与Romatschke和Venugopalan最近提出的玻璃体中指数增长的不稳定模的性质非常相似。虽然初始规范场在玻璃体中比在我们的模型中强得多，但它们随着Nielsen-Olesen不稳定模式的产生而衰减。讨论了利用有效均匀弱磁场再现玻璃体特征的原因。我们的分析支持了一个观点，即规范场的衰变是由Nielsen-Olesen不稳定性引起的。
We analyze the behavior of unstable modes in the glasma produced in high energy heavy ion collisions, using a simple model with effective homogeneous longitudinal color electric and magnetic fields. The unstable modes are approximately described as Nielsen-Olesen unstable modes under the homogeneous longitudinal gauge fields. We find that the Nielsen-Olesen unstable modes show properties very similar to those of the exponentially increasing unstable modes in the glasma recently shown by Romatschke and Venugopalan. Although initial gauge fields in the glasma are much stronger than the ones in our model, they decay with the production of the Nielsen-Olesen unstable modes. We discuss why we can reproduce the features of the glasma by using the effective homogeneous weak magnetic fields. Our analysis supports an idea that the decay of the gauge fields in the glasma is caused by Nielsen-Olesen instability.