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

页码：1553 / 1556

页数：4

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