Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Dynamical freeze-out condition in ultrarelativistic heavy ion collisions

Dynamical freeze-out condition in ultrarelativistic heavy ion collisions We determine the decoupling surfaces for the hydrodynamic description of heavy ion collisions at RHIC and LHC by comparing the local hydrodynamic expansion rate with the microscopic pion-pion scattering rate. The pion p T spectra for nuclear collisions at BNL Relativistic Heavy Ion Collider (RHIC) and CERN Large Hadron Collider (LHC) are computed by applying the Cooper-Frye procedure on the dynamical-decoupling surfaces and compared with those obtained from the constant-temperature freeze-out surfaces. Comparison with RHIC data shows that the system indeed decouples when the expansion rate becomes comparable with the pion scattering rate. The dynamical decoupling based on the rates comparison also suggests that the effective decoupling temperature in central heavy ion collisions remains practically unchanged from RHIC to LHC. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review C American Physical Society (APS)

Dynamical freeze-out condition in ultrarelativistic heavy ion collisions

Eskola, K. J; Niemi, H. J; Ruuskanen, P. V
Physical Review C , Volume 77 (4) – Apr 1, 2008
Download PDF
7 pages

Loading next page...
 
/lp/american-physical-society-aps/dynamical-freeze-out-condition-in-ultrarelativistic-heavy-ion-Dfc3HLYggx

References (5)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2008 The American Physical Society
ISSN
1089-490X
DOI
10.1103/PhysRevC.77.044907
Publisher site
See Article on Publisher Site

Abstract

We determine the decoupling surfaces for the hydrodynamic description of heavy ion collisions at RHIC and LHC by comparing the local hydrodynamic expansion rate with the microscopic pion-pion scattering rate. The pion p T spectra for nuclear collisions at BNL Relativistic Heavy Ion Collider (RHIC) and CERN Large Hadron Collider (LHC) are computed by applying the Cooper-Frye procedure on the dynamical-decoupling surfaces and compared with those obtained from the constant-temperature freeze-out surfaces. Comparison with RHIC data shows that the system indeed decouples when the expansion rate becomes comparable with the pion scattering rate. The dynamical decoupling based on the rates comparison also suggests that the effective decoupling temperature in central heavy ion collisions remains practically unchanged from RHIC to LHC.

Journal

Physical Review C – American Physical Society (APS)

Published: Apr 1, 2008

There are no references for this article.