Kondo cloud of single heavy quark in cold and dense matter
Kondo cloud of single heavy quark in cold and dense matter
复制标题
DOI：
10.1016/j.physletb.2017.08.066
复制
发表时间：
2016-08
影响因子：
4.4
通讯作者：
S. Yasui
中科院分区：
文献类型：
--
作者：
S. Yasui
近藤效应是在含有重杂质粒子的费米子系统中观察到的一种普遍现象，其相互作用受非阿贝尔相互作用控制。在极高的密度，我研究了近藤效应的颜色交换的夸克物质含有一个重（粲或底）夸克作为杂质粒子。为了得到具有近藤效应的基态，在平均场近似下引入了轻夸克和重夸克的混合凝聚（近藤云）。估算了近藤云形成的能量增益，指出近藤云具有共振结构。计算了轻夸克和重夸克的散射截面，并讨论了它对有限尺寸夸克物质的影响。
The Kondo effect is a universal phenomena observed in a variety of fermion systems containing a heavy impurity particle whose interaction is governed by the non-Abelian interaction. At extremely high density, I study the Kondo effect by color exchange in quark matter containing a single heavy (charm or bottom) quark as an impurity particle. To obtain the ground state with the Kondo effect, I introduce the condensate mixing the light quark and the heavy quark (Kondo cloud) in the mean-field approximation. I estimate the energy gain by formation of the Kondo cloud, and present that the Kondo cloud exhibits the resonant structure. I also evaluate the scattering cross section for the light quark and the heavy quark, and discuss its effect to the finite size quark matter.