论文标题
强烈相互作用中的全局极化效应和自旋轨道耦合
Global polarization effect and spin-orbit coupling in strong interaction
论文作者
论文摘要
在非中央高能重离子碰撞中，碰撞系统在与反应平面的正常状态相反的方向上具有巨大的轨道角动量。由于自旋轨道耦合在较强的相互作用中，如此巨大的轨道动量导致夸克和反夸克的极化。 RHIC的Star Collaboration最近观察到了这种效果，称为全球极化效应，该效果证实了十多年前的理论预测。该发现引起了人们对重离子碰撞旋转效应的研究的极大关注。它为研究QGP的特性和高能量重离子物理学的新方向开辟了一个新窗口 - 重离子碰撞中的自旋物理。在本章中，我们回顾了导致预测的原始思想和计算。我们强调了旋转轨道耦合在高能旋转物理学中所扮演的角色，并讨论了这一联系中的新机会和挑战。
In non-central high energy heavy ion collisions the colliding system posses a huge orbital angular momentum in the direction opposite to the normal of the reaction plane. Due to the spin-orbit coupling in strong interaction, such huge orbital angular momentum leads to the polarization of quarks and anti-quarks in the same direction. This effect, known as the global polarization effect, has been recently observed by STAR Collaboration at RHIC that confirms the theoretical prediction made more than ten years ago. The discovery has attracted much attention on the study of spin effects in heavy ion collision. It opens a new window to study properties of QGP and a new direction in high energy heavy ion physics -- Spin Physics in Heavy Ion Collisions. In this chapter, we review the original ideas and calculations that lead to the predictions. We emphasize the role played by spin-orbit coupling in high energy spin physics and discuss the new opportunities and challenges in this connection.
