Charmonium suppression with c(c)over-bar dissociation by strings

被引：60
|
作者：
Geiss, J [1 ]
Greiner, C [1 ]
Bratkovskaya, EL [1 ]
Cassing, W [1 ]
Mosel, U [1 ]
机构：
[1] Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany
来源：
PHYSICS LETTERS B | 1999年 / 447卷 / 1-2期
关键词：
relativistic heavy-ion collisions; J/psi production and absorption;
D O I：
10.1016/S0370-2693(98)01577-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the production of c (c) over bar pairs in nuclear reactions at SPS energies within the covariant transport approach HSD. The production of c (c) over bar pairs is treated perturbatively employing experimental cross sections while the interactions of c (c) over bar pairs with baryons are included by conventional cascade-type two-body collisions. Adopting 6 mb for the c (c) over bar-baryon cross section the data on J/Psi suppression in p + A reactions are reproduced in line with calculations based on the Glauber model. Additionally the dissociation of the c (c) over bar pairs by strings is included in a purely geometrical way. We find good agreement with the experimental data from the NA38 and NA50 Collaborations with an estimate for the string radius of R-s approximate to 0.2-0.25 fm. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：31 / 40
页数：10
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