Domain wall bubbles in high energy heavy ion collisions
Domain wall bubbles in high energy heavy ion collisions
复制标题
DOI：
10.1103/physrevc.66.034905
复制
发表时间：
2001-11
影响因子：
3.1
通讯作者：
E. Shuryak;A.R.Zhitnitsky
中科院分区：
文献类型：
--
作者：
E. Shuryak;A.R.Zhitnitsky
最近的研究表明，在高密度QCD($MU\NEQ0$)和具有大量颜色的QCD($N_c到\INFTY$)中都存在亚稳定磁区壁，并且这两种情况下的寿命都是指数长的。在我们的世界中也可能存在这样的亚稳态磁区壁，特别是在温度接近临界的热强子物质中。在这篇文章中，我们讨论了在重离子碰撞中，在QGP和强子物质的混合相中，由这样的壁形成的气泡会发生什么。我们证明，在它消失之前，它将在介子压力下进一步膨胀到更大的体积$\sim 20 fm^3$，无论是通过穿孔还是收缩。这两种情况都留下了这类事件的独特实验特征，对传出的介子之间的干扰关联产生了负面影响。
It has been recently shown that meta-stable domain walls exist in high-density QCD ($\mu\neq 0$) as well as in QCD with large number of colors ($N_c\to\infty$), with the lifetime being exponentially long in both cases. Such metastable domain walls may exist in our world as well, especially in hot hadronic matter with temperature close to critical. In this paper we discuss what happens if a bubble made of such wall is created in heavy ion collisions, in the mixed phase between QGP and hadronic matter. We show it will further be expanded to larger volume $\sim 20 fm^3$ by the pion pressure, before it disappears, either by puncture or contraction. Both scenarios leave distinctive experimental signatures of such events, negatively affecting the interference correlations between the outgoing pions.