U.S.-Nordic Cooperative Research on the Dynamics of Disoriented Chiral Condensates (Theoretical Physics)

该奖项支持Paul Ellis教授和Joseph Kapusta教授，以及明尼苏达大学的一名博士后和两名研究生，在奥斯陆大学的Eivind Osnes的协调下，与来自挪威卑尔根大学和奥斯陆大学以及丹麦哥本哈根大学的一组科学家合作进行理论物理研究。 北欧科学家是一个大型北方欧洲合作“相对论重离子碰撞项目”的一部分。 该区域项目的总目标是更好地了解高能重离子碰撞，特别强调受激核物质的性质。它为其他人处理复杂原子核高能碰撞的实验工作提供了理论支持。 美国研究人员的具体参与是研究夸克胶子等离子体强子化的动力学机制。 最终，这将导致一个详细的描述强子化，允许的结论得出有关的可观察到的信号强子化。 从广义上讲，这项研究涉及在实验可用的最高能量下的核碰撞的理论研究，预计在几年内产生夸克-胶子等离子体。 目前还没有什么基础来预测相变存在时的反应动力学，这项研究试图为夸克-胶子等离子体的演化提供理论上的见解。 它还将试图定义强子化和手征对称性破缺和恢复的可能信号，并评估信号对状态方程和相关函数的基本假设的敏感性。 拟议研究的结果将增加对非常小尺度下扩展的强相互作用物质结构的了解，这与理解早期宇宙等现象有关。 研究结果对于规划和评估未来大型加速器中的重离子实验也将是非常有用的。

This award supports Professors Paul Ellis and Joseph Kapusta , plus a postdoctoral associate and two graduate students from the University of Minnesota, to collaborate in theoretical physics research with a group of scientists from the Universities of Bergen and Oslo in Norway and the University of Copenhagen in Denmark, under the coordination of Eivind Osnes of the University of Oslo. The Nordic scientists are part of a large Northern European Collaborative `Project on Relativistic Heavy Ion Collisions.` The general objective of that regional project is a better understanding of high-energy heavy-ion collisions, with particular emphasis on the properties of excited nuclear matter. It is providing theoretical support for experimental work by others dealing with energetic collisions of complex atomic nuclei. The specific involvement of the US researchers is studying the dynamical mechanisms of hadronization of the quark gluon plasma. Ultimately this will lead to a detailed description of hadronization, allowing conclusions to be drawn regarding the observable signals of hadronization. Broadly speaking, this research involves the theoretical study of nuclear collision at the highest energies available to experiment, which are expected within a few years to produce a Quark-Gluon Plasma. There is little basis yet for predicting reaction dynamics in the presence of a phase transition, and this research is attempting to provide theoretical insight into the evolution of the Quark-Gluon Plasma. It will also seek to define possible signals of hadronization and chiral symmetry breaking and restoration, and evaluate the sensitivity of the signals to underlying assumptions about the equation of state and correlation functions. Results of the proposed studies will increase knowledge of the structure of extended, stronglyinteracting matter at very small scale, which is relevant to understanding of the early universe, among other phenomena. The results will also be very useful in planning and evaluating future heavy ion experiments in large accelerators.