用现代nPDFs修正的多相输运模型中重味产生的改进
Improvement of heavy flavor productions in a multi-phase transport model updated with modern nPDFs
摘要：
最近，我们更新了一个多相输运（AMPT）模型与现代部分子分布函数的核（nPDF）。在这里，我们研究开放的魅力生产更新的AMPT模型和比较的实验数据从$pp$和$AA$碰撞在很宽的碰撞能量范围。除了更新的nPDF，我们已经删除了初始重夸克生产的横向动量截止，也包括了由此产生的重味截面的总微喷截面在初始条件下所描述的HIJING模型。我们表明，AMPT模型与这些更新提供了一个更好的描述各种开的魅力强子的产额和横动量谱的实验数据相比。这为在传输模型方法中进一步研究重口味奠定了基础。
英文摘要：
Recently we have updated a multi-phase transport (AMPT) model with modern parton distribution functions of nuclei (nPDFs). Here we study open charm production in the updated AMPT model and compare to the experimental data from $pp$ and $AA$ collisions over a wide range of collision energies. Besides the update of nPDFs, we have removed the transverse momentum cutoff on initial heavy quark productions and also included the resultant heavy flavor cross section into the total minijet cross section in the initial condition as described by the HIJING model. We show that the AMPT model with these updates provides a much better description of the yields and transverse momentum spectra of various open charm hadrons in comparison with the experimental data. This lays the foundation for further heavy flavor studies within the transport model approach.
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