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arXiv · 1204.0853

Probing nuclear symmetry energy with the sub-threshold pion production

Fang Zhang·Yang Liu·Gao-Chan Yong·Wei Zuo
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Abstract

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 $π^{-}/π^{+}$ 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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Fang Zhang, Yang Liu, Gao-Chan Yong, Wei Zuo. 2012-04-05. Probing nuclear symmetry energy with the sub-threshold pion production. https://doi.org/10.1088/0256-307x%2F29%2F5%2F052502

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