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Title: Strangeness, charm, and bottom production from dense parton matter in high energy nuclear collisions

Abstract

The production properties of strange, charm, and bottom quarks in ultrarelativistic [ital A]+[ital A] collisions at heavy ion colliders are investigated for systems from [ital p]+[ital p] to Au+Au in the energy range [radical][ital s] /[ital A]=200--6300 GeV, using the parton cascade model. Within this kinetic space-time description of the parton dynamics, based on the current understanding of semihard and hard QCD interactions, it is found that a substantial enhancement of [ital s], [ital c], and [ital b] production can be expected in [ital AA] collisions [ital with] plasma formation of the deconfined parton matter relative to the case of a purely hadronic scenario [ital without] plasma formation. Because of the large number of initially produced energetic gluons the main contribution comes from decays of virtually excited gluons and gluon fusion. The associated resonance production of [phi], [ital J]/[psi], and [Upsilon] is estimated and it is shown that the resulting abundances of these vector mesons can be used as a sensitive thermometer of the hot and dense QCD matter formed in the central region durng the very early stage of the collisions. Therefore the future heavy ion collider experiments would have an attractive opportunity to probe the evolution of partonsmore » through preequilibrium toward plasma formation by measuring the multiplicities and momentum spectra of heavy mesons.« less

Authors:
 [1]
  1. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
Publication Date:
OSTI Identifier:
6131385
DOE Contract Number:  
FG02-87ER40328
Resource Type:
Journal Article
Journal Name:
Physical Review, D (Particles Fields); (United States)
Additional Journal Information:
Journal Volume: 48:9; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; HEAVY ION REACTIONS; PARTON MODEL; CASCADE THEORY; CHARM PARTICLES; MULTIPLICITY; PLASMA; QUANTUM CHROMODYNAMICS; SPACE-TIME; STRANGENESS; VECTOR MESONS; BOSONS; CHARGED-PARTICLE REACTIONS; COMPOSITE MODELS; ELEMENTARY PARTICLES; FIELD THEORIES; HADRONS; MATHEMATICAL MODELS; MESONS; NUCLEAR REACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; QUANTUM FIELD THEORY; 663450* - Heavy-Ion-Induced Reactions & Scattering- (1992-); 662230 - Quantum Chromodynamics- (1992-); 663300 - Nuclear Reactions & Scattering, General- (1992-)

Citation Formats

Geiger, K. Strangeness, charm, and bottom production from dense parton matter in high energy nuclear collisions. United States: N. p., 1993. Web. doi:10.1103/PhysRevD.48.4129.
Geiger, K. Strangeness, charm, and bottom production from dense parton matter in high energy nuclear collisions. United States. doi:10.1103/PhysRevD.48.4129.
Geiger, K. Mon . "Strangeness, charm, and bottom production from dense parton matter in high energy nuclear collisions". United States. doi:10.1103/PhysRevD.48.4129.
@article{osti_6131385,
title = {Strangeness, charm, and bottom production from dense parton matter in high energy nuclear collisions},
author = {Geiger, K},
abstractNote = {The production properties of strange, charm, and bottom quarks in ultrarelativistic [ital A]+[ital A] collisions at heavy ion colliders are investigated for systems from [ital p]+[ital p] to Au+Au in the energy range [radical][ital s] /[ital A]=200--6300 GeV, using the parton cascade model. Within this kinetic space-time description of the parton dynamics, based on the current understanding of semihard and hard QCD interactions, it is found that a substantial enhancement of [ital s], [ital c], and [ital b] production can be expected in [ital AA] collisions [ital with] plasma formation of the deconfined parton matter relative to the case of a purely hadronic scenario [ital without] plasma formation. Because of the large number of initially produced energetic gluons the main contribution comes from decays of virtually excited gluons and gluon fusion. The associated resonance production of [phi], [ital J]/[psi], and [Upsilon] is estimated and it is shown that the resulting abundances of these vector mesons can be used as a sensitive thermometer of the hot and dense QCD matter formed in the central region durng the very early stage of the collisions. Therefore the future heavy ion collider experiments would have an attractive opportunity to probe the evolution of partons through preequilibrium toward plasma formation by measuring the multiplicities and momentum spectra of heavy mesons.},
doi = {10.1103/PhysRevD.48.4129},
journal = {Physical Review, D (Particles Fields); (United States)},
issn = {0556-2821},
number = ,
volume = 48:9,
place = {United States},
year = {1993},
month = {11}
}