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Title: Open charm as a probe of preequilibrium dynamics in nuclear collisions

Abstract

The preequilibrium contribution to open charm production in nuclear collisions at [radical][ital s] =200 A GeV is calculated and shown to be sensitive to the early time evolution of the initial minijet gluon plasma. The role of charm as a probe of the formation zone physics and correlations between momentum and space-time coordinates is emphasized. While ideal (Bjorken) correlation between the rapidity [ital y] and space-time rapidity [eta] of minijet gluons suppresses greatly the preequilibrium yield, the minimal correlation with finite geometrical spread enhances the initial fusion rate by a factor [similar to]2 in the moderate [ital p][sub [perpendicular]][similar to]2--6 GeV range. That is dominated by fusion of semihard'' [ital p][sub [perpendicular]][gt]2 GeV minijet gluons and secondary soft'' [ital p][sub [perpendicular]][lt]2 GeV gluons from initial and final state radiation. The intrinsic'' charm process is negligible in the midrapidity domain.

Authors:
;  [1]
  1. (Department of Physics, Columbia University, New York, New York 10027 (United States))
Publication Date:
OSTI Identifier:
6545423
Alternate Identifier(s):
OSTI ID: 6545423
Resource Type:
Journal Article
Journal Name:
Physical Review, C (Nuclear Physics); (United States)
Additional Journal Information:
Journal Volume: 51:4; Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CHARM PARTICLES; PARTICLE PRODUCTION; DYNAMICS; EQUILIBRIUM; HEAVY ION REACTIONS; CORRELATIONS; GLUONS; JETS; PLASMA; QUANTUM CHROMODYNAMICS; SPACE-TIME; BOSONS; CHARGED-PARTICLE REACTIONS; ELEMENTARY PARTICLES; FIELD THEORIES; MECHANICS; NUCLEAR REACTIONS; POSTULATED PARTICLES; QUANTUM FIELD THEORY 663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-); 663300 -- Nuclear Reactions & Scattering, General-- (1992-)

Citation Formats

Lin, Z., and Gyulassy, M.. Open charm as a probe of preequilibrium dynamics in nuclear collisions. United States: N. p., 1995. Web. doi:10.1103/PhysRevC.51.2177.
Lin, Z., & Gyulassy, M.. Open charm as a probe of preequilibrium dynamics in nuclear collisions. United States. doi:10.1103/PhysRevC.51.2177.
Lin, Z., and Gyulassy, M.. Sat . "Open charm as a probe of preequilibrium dynamics in nuclear collisions". United States. doi:10.1103/PhysRevC.51.2177.
@article{osti_6545423,
title = {Open charm as a probe of preequilibrium dynamics in nuclear collisions},
author = {Lin, Z. and Gyulassy, M.},
abstractNote = {The preequilibrium contribution to open charm production in nuclear collisions at [radical][ital s] =200 A GeV is calculated and shown to be sensitive to the early time evolution of the initial minijet gluon plasma. The role of charm as a probe of the formation zone physics and correlations between momentum and space-time coordinates is emphasized. While ideal (Bjorken) correlation between the rapidity [ital y] and space-time rapidity [eta] of minijet gluons suppresses greatly the preequilibrium yield, the minimal correlation with finite geometrical spread enhances the initial fusion rate by a factor [similar to]2 in the moderate [ital p][sub [perpendicular]][similar to]2--6 GeV range. That is dominated by fusion of semihard'' [ital p][sub [perpendicular]][gt]2 GeV minijet gluons and secondary soft'' [ital p][sub [perpendicular]][lt]2 GeV gluons from initial and final state radiation. The intrinsic'' charm process is negligible in the midrapidity domain.},
doi = {10.1103/PhysRevC.51.2177},
journal = {Physical Review, C (Nuclear Physics); (United States)},
issn = {0556-2813},
number = ,
volume = 51:4,
place = {United States},
year = {1995},
month = {4}
}