Production and rescattering of strange baryons at SPS energies in a transport model with hadron potentials
Production and rescattering of strange baryons at SPS energies in a transport model with hadron potentials
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DOI：
10.1142/s0217732312500046
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发表时间：
2010-10
期刊：
影响因子：
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通讯作者：
Qingfeng Li;Zhu-xia Li
中科院分区：
文献类型：
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作者：
Qingfeng Li;Zhu-xia Li
利用平均场势的超相对论量子分子动力学（UrQMD）模型研究了SPS能重离子碰撞中奇异重子的产生，特别是$\Lambda$s和$\overline{\Lambda}$s.结果表明，在UrQMD中同时考虑强子的形成势和预形成势后，$\Lambda$s和$\overline{\Lambda}$s实验数据的横向质量和纵向快度分布都能得到较好的定量解释.我们的研究还表明，强子的产生机制和再散射过程对奇异重子的最终产额起着重要的作用。
A mean-field potential version of the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) model is used to investigate the production of strange baryons, especially the $\Lambda$s and $\overline{\Lambda}$s, from heavy ion collisions at SPS energies. It is found that, with the consideration of both formed and pre-formed hadron potentials in UrQMD, the transverse mass and longitudinal rapidity distributions of experimental data of both $\Lambda$s and $\overline{\Lambda}$s can be quantitatively explained fairly well. Our investigation also shows that both the production mechanism and the rescattering process of hadrons play important roles in the final yield of strange baryons.