Evidence for a phase with high specific entropy in nuclear collisions
Journal Article
·
· Physical Review Letters; (United States)
- Laboratoire de Physique Theorique et Hautes Energies, Universite Paris 7, tour 24, 5e et., 2 place Jussieu, F-75251 Paris CEDEX 05 (France) Institut fuer Theoretische Physik, Universitaet Regensburg, D-8400 Regensburg (Germany) Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States)
We determine the entropy-per-baryon content of the central reaction region in terms of the charged particle multiplicity. We study the consistency of our findings with recent data on strange antibaryon production at 200[ital A] GeV in S-[ital A] collisons ([ital A][similar to]200) assuming formation of a central fireball. Hadron gas models which do not invoke strong medium modifications of hadron masses do not provide enough entropy and are inconsistent with the combined experimental results. In contrast the quark-gluon plasma hypothesis explains them naturally.
- DOE Contract Number:
- FG02-92ER40733
- OSTI ID:
- 6521368
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 70:23; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
662230 -- Quantum Chromodynamics-- (1992-)
663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIBARYONS
ANTIMATTER
ANTIPARTICLES
BARYONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DATA
ELEMENTARY PARTICLES
ENERGY RANGE
ENTROPY
EXPERIMENTAL DATA
FERMIONS
FIREBALLS
GEV RANGE
GEV RANGE 100-1000
HADRONS
HEAVY ION REACTIONS
INFORMATION
IONS
MATTER
MULTIPLICITY
NUCLEAR REACTIONS
NUMERICAL DATA
PHASE STUDIES
PHYSICAL PROPERTIES
STRANGE PARTICLES
SULFUR IONS
THERMODYNAMIC PROPERTIES
663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIBARYONS
ANTIMATTER
ANTIPARTICLES
BARYONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DATA
ELEMENTARY PARTICLES
ENERGY RANGE
ENTROPY
EXPERIMENTAL DATA
FERMIONS
FIREBALLS
GEV RANGE
GEV RANGE 100-1000
HADRONS
HEAVY ION REACTIONS
INFORMATION
IONS
MATTER
MULTIPLICITY
NUCLEAR REACTIONS
NUMERICAL DATA
PHASE STUDIES
PHYSICAL PROPERTIES
STRANGE PARTICLES
SULFUR IONS
THERMODYNAMIC PROPERTIES