FREEZE-OUT TIME IN ULTRARELATIVISTIC HEAVY-ION COLLISIONS FROM COULOMB EFFECTS IN TRANSVERSE PION SPECTRA

Authors
BARZ HW BONDORF JP GAARDHOJE JJ HEISELBERG H
Citation
Hw. Barz et al., FREEZE-OUT TIME IN ULTRARELATIVISTIC HEAVY-ION COLLISIONS FROM COULOMB EFFECTS IN TRANSVERSE PION SPECTRA, Physical review. C. Nuclear physics, 56(3), 1997, pp. 1553-1556
Citations number
14
Categorie Soggetti
Physics, Nuclear
Journal title
Physical review. C. Nuclear physics → ACNP
ISSN journal
05562813
Volume
56
Issue
3
Year of publication
1997
Pages
1553 - 1556
Database
ISI
SICI code
0556-2813(1997)56:3<1553:FTIUHC>2.0.ZU;2-4
Abstract
The influence of the nuclear Coulomb field on transverse spectra of pi (+) and pi(-) measured in Pb+Pb reactions at 158A GeV has been investi gated. Pion trajectories are calculated in the field of an expanding f ireball. The observed enhancement of the pi(-)/pi(+) ratio at small mo menta 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.