Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2005-12-17
Phys.Rev.C73:034603,2006
Physics
Nuclear Physics
Nuclear Theory
11 pages, 3 figures, to appear in Physics Review C
Scientific paper
10.1103/PhysRevC.73.034603
Based on an isospin- and momentum-dependent hadronic transport model IBUU04, effects of the nuclear symmetry energy on the single and double pi^{-}/pi^{+}ratios in central reactions of ^{132}Sn+^{124}Sn and ^{112}Sn+^{112}Sn at a beam energy of 400 MeV/nucleon are studied. It is found that around the Coulomb peak of the single pi^{-}/pi^{+} ratio the double pi^{-}/pi^{+} ratio taken from the two isotopic reactions retains about the same sensitivity to the density dependence of nuclear symmetry energy. Because the double pi^{-}/pi^{+}ratio can reduce significantly the systematic errors, it is thus a more effective probe for the high-density behavior of the nuclear symmetry energy.
Chen Lie-Wen
Li Bao-An
Yong Gao-Chan
Zuo Wei
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