Thermalization in ultrarelativistic nuclear collisions. II. Entropy production and energy densities at the BNL Relativistic Heavy Ion Collider and the CERN Large Hadron Collider

Journal Article · Tue Dec 01 00:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.4986· OSTI ID:6967094

Geiger, K ^[1]

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1. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

The dynamics of partons in ultrarelativistic [sup 197]Au+[sup 197]Au collisions in the future collider experiments at the BNL Relativistic Heavy Ion Collider and the CERN Large Hadron Collider during the first 3 fm/[ital c] is simulated in full six-dimensional phase space within a parton cascade model to compute the entropy production and the space-time-dependent energy densities, temperatures, etc., in the central collision region. The partons' evolution from preequilibrium towards the formation of a thermalized quark-gluon plasma is investigated and compared to the Bjorken scenario. Moreover, an equation of state is extracted together with initial conditions for the further hydrodynamical space-time evolution of the matter. For central [sup 197]Au+[sup 197]Au collisions with [radical][ital s] =200--6300[ital A] GeV the predictions for the energy densities and associated temperatures at [ital t]=3 fm/[ital c] after the first instant of the collisions are [var epsilon]=15--31 GeV/fm[sup 3] and [ital T]=297--343 MeV, respectively. The multiplicity of final pions from the plasma is estimated from the amount of entropy produced, yielding a huge [ital dN][sup ([pi])]/[ital dy][congruent]1900--3400.

• DOE Contract Number: FG02-87ER40328
• OSTI ID: 6967094
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 46:11; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
GOLD 197
HEAVY ION REACTIONS
ENTROPY
NUCLEON-NUCLEON INTERACTIONS
CASCADE THEORY
ENERGY DENSITY
EQUATIONS OF STATE
HYDRODYNAMIC MODEL
MANY-DIMENSIONAL CALCULATIONS
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HEAVY NUCLEI
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INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
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MATHEMATICAL MODELS
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NUCLEAR REACTIONS
NUCLEI
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662340* - Hadron Interactions- (1992-)
662230 - Quantum Chromodynamics- (1992-)