Transport model study of nuclear stopping in heavy-ion collisions over the energy range from 0.09A to 160A GeV

Nuclear stopping in heavy-ion collisions over a beam energy range from SIS and AGS up to SPS is studied in the framework of the modified Ultrarelativistic Quantum Molecular Dynamics transport model, in which mean field potentials of both formed and 'preformed' hadrons (from string fragment...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 2010-03, Vol.81 (3)
Main Authors: Yuan Ying, China Institute of Atomic Energy, Post Office Box 275, Li Qingfeng, Li Zhuxia, Liu Fuhu
Format: Article
Language:English
Subjects:
BARYONS
BEAMS
CALCULATION METHODS
CROSS SECTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY LOSSES
ENERGY RANGE
EQUATIONS
EQUATIONS OF STATE
FERMIONS
FLEXIBILITY
FRAGMENTATION
GEV RANGE
HADRONS
HEAVY ION REACTIONS
LOSSES
MEAN-FIELD THEORY
MECHANICAL PROPERTIES
MODIFICATIONS
MOLECULAR DYNAMICS METHOD
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PROTONS
RELATIVISTIC RANGE
TENSILE PROPERTIES
TRANSPORT THEORY
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Summary:Nuclear stopping in heavy-ion collisions over a beam energy range from SIS and AGS up to SPS is studied in the framework of the modified Ultrarelativistic Quantum Molecular Dynamics transport model, in which mean field potentials of both formed and 'preformed' hadrons (from string fragmentation) and medium-modified nucleon-nucleon elastic cross sections are considered. It is found that nuclear stopping is influenced by both the stiffness of the equation of state and medium modifications of nucleon-nucleon cross sections at SIS energies. At high SPS energies, a two-bump structure is shown in the experimental rapidity distribution of free protons, which can be understood by considering the preformed hadron potentials.
ISSN:0556-2813
1089-490X
DOI:10.1103/PHYSREVC.81.034913