Probing nuclear symmetry energy with the sub-threshold pion production

Details Probing nuclear symmetry energy with the sub-threshold pion production Probing nuclear symmetry energy with the sub-threshold pion production

2012-04-04

arxiv.org/abs/1204.0853v2

CHIN. PHYS. LETT. Vol. 29, No. 5 (2012) 052502

Physics

Nuclear Physics

Nuclear Theory

5 pages, 5 figures, typo corrections, submitted to Chinese Physics Letters

Scientific paper

Within the framework of semiclassical Boltzmann-Uehling-Uhlenbeck (BUU) transport model, we investigated the effects of symmetry energy on the sub-threshold pion using the isospin MDI interaction with the stiff and soft symmetry energies in the central collision of $^{48}$Ca + $^{48}$Ca at the incident beam energies of 100, 150, 200, 250 and 300 MeV/nucleon, respectively. We find that the ratio of $\pi^{-}/\pi^{+}$ of sub-threshold charged pion production is greatly sensitive to the symmetry energy, particularly around 100 MeV/nucleon energies. Large sensitivity of sub-threshold charged pion production to nuclear symmetry energy may reduce uncertainties of probing nuclear symmetry energy via heavy-ion collision.

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