Freeze-out time in ultrarelativistic heavy ion collisions from Coulomb effects in transverse pion spectra

被引：14
作者：
Barz, HW
Bondorf, JP
Gaardhoje, JJ
Heiselberg, H
机构：
[1] NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK
[2] NORDITA, DK-2100 COPENHAGEN, DENMARK
来源：
PHYSICAL REVIEW C | 1997年 / 56卷 / 03期
关键词：
D O I：
10.1103/PhysRevC.56.1553
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：
The influence of the nuclear Coulomb field on transverse spectra of pi(+) and pi(-) measured in Pb+Pb reactions at 158A GeV has been investigated. Pion trajectories are calculated in the field of an expanding fireball. The observed enhancement of the pi(-)/pi(+) ratio at small momenta depends on the temperature and transverse expansion velocity of the source, the rapidity distribution of the net positive charge, and mainly the time of the freeze-out.
引用
收藏
页码：1553 / 1556
页数：4
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