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Title: Dynamical evolution of the scalar condensate in heavy ioncollisions

Abstract

We derive the effective coarse-grained field equation forthe scalar condensate of the linear sigma model in a simple andstraightforward manner using linear response theory. The dissipativecoefficient is calculated at tree level on the basis of the physicalprocesses of sigma-meson decay and of thermal sigma-mesons and pionsknocking sigma-mesons out of the condensate. The field equation is solvedfor hot matter undergoing either one or three dimensional expansion andcooling in the aftermath of a high energy nuclear collision. The resultsshow that the time constant for returning the scalar condensate tothermal equilibrium is of order 2 fm/c. Comment: 19 pages, 3 figures areembedded at the end. The effect of the time dependence of the condensatev is included in this revised version. Numerical work is redoneaccordingly

Authors:
; ; ;
Publication Date:
Research Org.:
COLLABORATION - U. ofNorway
OSTI Identifier:
907894
Report Number(s):
LBNL-45191
TRN: US0703342
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 61; Related Information: Journal Publication Date: 2000
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 74 ATOMIC AND MOLECULAR PHYSICS; CONDENSATES; DECAY; FIELD EQUATIONS; HEAVY IONS; PIONS; SCALARS; SIGMA MODEL; THERMAL EQUILIBRIUM; TIME DEPENDENCE

Citation Formats

Csernai, Laszlo P., Ellis, Paul J., Jeon, Sangyong, and Kapusta,Joseph I. Dynamical evolution of the scalar condensate in heavy ioncollisions. United States: N. p., 1999. Web.
Csernai, Laszlo P., Ellis, Paul J., Jeon, Sangyong, & Kapusta,Joseph I. Dynamical evolution of the scalar condensate in heavy ioncollisions. United States.
Csernai, Laszlo P., Ellis, Paul J., Jeon, Sangyong, and Kapusta,Joseph I. Tue . "Dynamical evolution of the scalar condensate in heavy ioncollisions". United States.
@article{osti_907894,
title = {Dynamical evolution of the scalar condensate in heavy ioncollisions},
author = {Csernai, Laszlo P. and Ellis, Paul J. and Jeon, Sangyong and Kapusta,Joseph I.},
abstractNote = {We derive the effective coarse-grained field equation forthe scalar condensate of the linear sigma model in a simple andstraightforward manner using linear response theory. The dissipativecoefficient is calculated at tree level on the basis of the physicalprocesses of sigma-meson decay and of thermal sigma-mesons and pionsknocking sigma-mesons out of the condensate. The field equation is solvedfor hot matter undergoing either one or three dimensional expansion andcooling in the aftermath of a high energy nuclear collision. The resultsshow that the time constant for returning the scalar condensate tothermal equilibrium is of order 2 fm/c. Comment: 19 pages, 3 figures areembedded at the end. The effect of the time dependence of the condensatev is included in this revised version. Numerical work is redoneaccordingly},
doi = {},
journal = {Physical Review C},
number = ,
volume = 61,
place = {United States},
year = {1999},
month = {8}
}