Psi'/Psi ratio in nucleus-nucleus collisions: A measure for the chiral symmetry restoration temperature?

被引：39

作者：

Sorge, H

Shuryak, E

Zahed, I

机构：

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.79.2775

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We argue that a decrease of the chiral scalar meson mass is responsible for recreation of Psi' from J/Psi in ultrarelativistic nucleus-nucleus collisions. This causes the charmonium yields to freeze out at temperatures close to the chiral symmetry restoration temperature T-c. As a result the ratio Psi'/Psi may serve as a thermometer for T-c itself. Results in a detailed reaction model support the conjecture. They show good agreement with recent data of NA38 and NA50 for J/Psi and Psi' production in S on U and Pb on Pb collisions.

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页码：2775 / 2778

页数：4

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