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Initial energy density of quark-gluon plasma in relativistic heavy-ion collisions

Journal Article · · Phys. Rev. D; (United States)

We estimate the initial rapidity distribution and the initial energy density in the central rapidity region of relativistic heavy-ion collisions by using a multiple-collision model and the nuclear-thickness function of Glauber. The parameter of the rapidity distribution is determined from the experimental multiplicity data of p..cap alpha.., dd, ..cap alpha cap alpha.., pA, ..pi../sup +/A, K/sup +/A, Si+Ag, and Ca+C reactions. We find that the initial energy density in the central rapidity region is high. For example, for the head-on collision of /sup 238/U on /sup 238/U at 30 GeV per nucleon in the center-of-mass system, the maximum energy density is about 10 GeV/fm/sup 3/, which may exceed the critical energy density for a phase transition from a confined hadron matter to an unconfined quark-gluon plasma. The initial energy density goes as A/sup 1/3/B/sup 1/3/ for the collision of two nuclei with mass numbers A and B, and is rather insensitive to impact parameters.

Research Organization:
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
OSTI ID:
6216294
Journal Information:
Phys. Rev. D; (United States), Journal Name: Phys. Rev. D; (United States) Vol. 30:5; ISSN PRVDA
Country of Publication:
United States
Language:
English

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Related Subjects

645207* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Strong Interactions
Baryon No. Greater than 1-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BAG MODEL
BARYON-BARYON INTERACTIONS
CHARGED-PARTICLE REACTIONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
ENERGY DENSITY
ENERGY RANGE
EXTENDED PARTICLE MODEL
GLAUBER THEORY
GLUONS
HADRON-HADRON INTERACTIONS
HEAVY ION REACTIONS
INELASTIC SCATTERING
INTERACTIONS
MATHEMATICAL MODELS
MATTER
MULTIPLE SCATTERING
NUCLEAR REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PLASMA
POSTULATED PARTICLES
QUARK MATTER
QUARK MODEL
RELATIVISTIC RANGE
SCATTERING
TARGETS
TEV RANGE
TEV RANGE 01-10
URANIUM 238 REACTIONS
URANIUM 238 TARGET