Systematic study of the {pi}{sup -}/{pi}{sup +} ratio in heavy-ion collisions with the same neutron/proton ratio but different masses
Journal Article
·
· Physical Review. C, Nuclear Physics
- Department of Physics, Tsinghua University, Beijing 100084 (China)
- Department of Physics and Astronomy, Texas A and M University-Commerce, Commerce, Texas 75429-3011 (United States)
- Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China)
A systematic study of the {pi}{sup -}/{pi}{sup +} ratio in heavy-ion collisions with the same neutron/proton ratio but different masses can help single out effects of the nuclear mean field on pion production. Based on simulations using the IBUU04 transport model, it is found that the {pi}{sup -}/{pi}{sup +} ratio in head-on collisions of {sup 48}Ca+{sup 48}Ca, {sup 124}Sn+{sup 124}Sn, and {sup 197}Au+{sup 197}Au at beam energies from 0.25 to 0.6 GeV/nucleon increases with increasing the system size or decreasing the beam energies. A comprehensive analysis of the dynamical isospin fractionation and the {pi}{sup -}/{pi}{sup +} ratio as well as their time evolution and spatial distributions demonstrates clearly that the {pi}{sup -}/{pi}{sup +} ratio is an effective probe of the high-density behavior of the nuclear symmetry energy.
- OSTI ID:
- 21293853
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAMS
CALCIUM 48
CALCIUM 48 TARGET
COLLISIONS
DENSITY
FRACTIONATION
GOLD 197
GOLD 197 TARGET
HEAVY ION REACTIONS
ISOSPIN
MASS
MEAN-FIELD THEORY
NEUTRONS
PARTICLE PRODUCTION
PIONS MINUS
PIONS PLUS
PROTONS
SIMULATION
SPATIAL DISTRIBUTION
SYMMETRY
TIN 124
TIN 124 TARGET
TRANSPORT THEORY
BEAMS
CALCIUM 48
CALCIUM 48 TARGET
COLLISIONS
DENSITY
FRACTIONATION
GOLD 197
GOLD 197 TARGET
HEAVY ION REACTIONS
ISOSPIN
MASS
MEAN-FIELD THEORY
NEUTRONS
PARTICLE PRODUCTION
PIONS MINUS
PIONS PLUS
PROTONS
SIMULATION
SPATIAL DISTRIBUTION
SYMMETRY
TIN 124
TIN 124 TARGET
TRANSPORT THEORY