Charmonium suppression by gluon bremsstrahlung in p-A and A-B collisions

被引：11
|
作者：
Hüfner, J
He, YB
Kopeliovich, BZ
机构：
[1] Univ Heidelberg, Inst Theoret Phys, D-69120 Heidelberg, Germany
[2] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany
[3] Dubna Joint Nucl Res Inst, Dubna 141980, Moscow Region, Russia
来源：
EUROPEAN PHYSICAL JOURNAL A | 2000年 / 7卷 / 02期
关键词：
D O I：
10.1007/s100500050387
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Prompt gluons are an additional source for charmonium suppression in nuclear collisions, in particular for nucleus-nucleus collisions. These gluons are radiated as bremsstrahlung in N-N collisions and interact inelastically with the charmonium states while the nuclei still overlap. The spectra and mean number [n(g)] of the prompt gluons are calculated perturbatively and the inelastic cross section sigma(abs)(Psi g) is estimated. The integrated cross sections sigma(AB --> J/phi X) for p-A and A-B collisions and the dependence on transverse energy for S-U and Pb-Pb can be described quantitatively with some adjustment of one parameter [n(g)] sigma(abs)(Psi g).
引用
收藏
页码：239 / 244
页数：6
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