Probing nuclear symmetry energy with the sub-threshold pion production

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 ${\pi }^{-}/{\pi }^{+}$ 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.

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

References in corpus (4)

• Probing the Nuclear Symmetry Energy with Heavy Ion Collisions
• A systematic study of the ${\pi }^{-}/{\pi }^{+}$ ratio in heavy-ion collisions with the same neutron/proton ratio but different masses
• Dynamics of pion production in heavy-ion collisions around 1A GeV energies
• Nuclear symmetry energy and proton-rich reactions at intermediate energies

Cited by in corpus (4)

• Energy dependence of pion in-medium effects on π^-/π^+ ratio in heavy-ion collisions
• Effects of nuclear symmetry energy on eta meson production and its rare decay to the dark U-boson in heavy-ion reactions
• Decomposition of sensitivity of the symmetry energy observables
• Effects of nuclear symmetry energy and in-medium NN cross section in heavy-ion collisions at beam energies below the pion production threshold