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

页码：31 / 40

页数：10

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