Dynamics of pion production in heavy-ion collisions around 1A GeV energies

Details Dynamics of pion production in heavy-ion collisions around 1A GeV energies Dynamics of pion production in heavy-ion collisions around 1A GeV energies

2010-06-12

arxiv.org/abs/1006.2459v2

Phys.Rev.C82:044615,2010

Physics

Nuclear Physics

Nuclear Theory

12 pages, 14 figures

Scientific paper

10.1103/PhysRevC.82.044615

Within the framework of the improved isospin dependent quantum molecular dynamics (ImIQMD) model, the dynamics of pion emission in heavy-ion collisions in the region 1 A GeV as a probe of nuclear symmetry energy at supra-saturation densities is investigated systematically. The total pion multiplicities and the $\pi^{-}/\pi^{+}$ yields are calculated for selected Skyrme parameters SkP, SLy6, Ska and SIII, and also for the cases of different stiffness of symmetry energy with the parameter SLy6. The influence of Coulomb potential, symmetry energy and in-medium pion potential on the pion production is investigated and compared each other by analyzing the distributions of transverse momentum and longitudinal rapidity and also the excitation functions of the total pion and the $\pi^{-}/\pi^{+}$ ratio. The directed flow, elliptic flow and polar angle distributions are calculated at the cases of different collision centralities and symmetry energies.

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