Baryon distribution in relativistic heavy-ion collisions
In order to determine whether a pure quark-gluon plasma with no net baryon density can be formed in the central rapidity region in relativistic heavy-ion collisions, we estimate the baryon distribution by using a Glauber-type multiple-collision model in which the nucleons of one nucleus degrade in energy as they make collisions with nucleons in the other nucleus. As a test of this model, we study first nucleon-nucleus collisions at 100 GeV/c and compare the theoretical results with the experimental data of Barton et al. The results are then generalized to study the baryon distribution in nucleus-nucleus collisions. It is found that in the head-on collision of two heavy nuclei (A> or approx. =100), the baryon rapidity distributions have broad peaks and extend well into the central rapidity region. The energy density of the baryon in the central rapidity region is about 5--6 % of the total energy density at a center-of-mass energy of 30 GeV per nucleon and decreases to about 2--3 % at a center-of-mass energy of 100 GeV per nucleon. The stopping power for a baryon in nuclear matter is extracted.
- Research Organization:
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
- OSTI ID:
- 6349719
- 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
Baryon No. Greater than 1-- (-1987)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BARYONS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
ENERGY DENSITY
ENERGY RANGE
FERMIONS
GLAUBER THEORY
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY ION REACTIONS
INTERACTIONS
MATTER
MULTIPLE SCATTERING
NUCLEAR MATTER
NUCLEAR REACTIONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PARTICLE RAPIDITY
QUARK MATTER
RELATIVISTIC RANGE
SCATTERING