Transverse momentum dependence of anomalous J/ψ suppression in Pb-Pb collisions

被引：14
|
作者：
Hüfner, J
Zhuang, PF
机构：
[1] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany
[2] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
来源：
PHYSICS LETTERS B | 2001年 / 515卷 / 1-2期
关键词：
D O I：
10.1016/S0370-2693(01)00864-4
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The recently published data for <p(t)(2)> for J/psi production in Pb-Pb collisions at 158 A GeV are analyzed. For low values of transverse energy E-t, where normal suppression dominates, <p(t)(2)> (E-t) scales with the path length of the gluons which fuse to make the J/psi. In the E-t domain of anomalous suppression <p(t)(2)> (E-t) is found to rise linearly with the relative amount of anomalous suppression. This empirical law is reproduced within an analytically solvable transport model which allows high p(t) J/psi 's to escape anomalous suppression. Interpreted in this way, the data for <p(t)(2)> (E-t) lead to an estimate of t(A) similar to 4 fm/c for t the duration of anomalous suppression. (C) 2001 Published by Elsevier Science B.V.
引用
收藏
页码：115 / 120
页数：6
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