Single and double {pi}{sup -}/{pi}{sup +} ratios in heavy-ion reactions as probes of the high-density behavior of the nuclear symmetry energy

Journal Article · Wed Mar 15 04:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.034603· OSTI ID:20771350

Gaochan, Yong ^[1]; Baoan, Li ^[2]; Liewen, Chen ^[3]; Wei, Zuo ^[1]

---

1. Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000 (China)
2. Department of Chemistry and Physics, P.O. Box 419, Arkansas State University, State University, Arkansas 72467-0419 (United States)
3. Institute of Theoretical Physics, Shanghai Jiao Tong University, Shanghai 200240 (China)

Based on the isospin- and momentum-dependent hadronic transport model IBUU04, effects of the nuclear symmetry energy on the single and double {pi}{sup -}/{pi}{sup +} ratios in central reactions of {sup 132}Sn+{sup 124}Sn and {sup 112}Sn+{sup 112}Sn at a beam energy of 400 MeV/nucleon are studied. It is found that around the Coulomb peak of the single {pi}{sup -}/{pi}{sup +} ratio the double {pi}{sup -}/{pi}{sup +} ratio taken from the two isotopic reactions retains about the same sensitivity to the density dependence of nuclear symmetry energy. Because the double {pi}{sup -}/{pi}{sup +} ratio can significantly reduce the systematic errors, it is thus a more effective probe for the high-density behavior of the nuclear symmetry energy.

• OSTI ID: 20771350
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 73; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DENSITY
HEAVY ION REACTIONS
ISOSPIN
MEV RANGE
PARTICLE PRODUCTION
PIONS MINUS
PIONS PLUS
SYMMETRY
TIN 112
TIN 124
TIN 132
TRANSPORT THEORY