标题： 重夸克势和重离子碰撞中的热charm产生 显示英文标题

标题： Heavy quark potential and thermal charm production in heavy-ion collisions

摘要： 在QGP（夸克胶子等离子体）中的重夸克质量与重夸克在大距离处的势有关。 在这项研究中，我们通过LHC（大型强子对撞机）中的重离子碰撞中charm夸克的热产生，测试了三种不同的重夸克势，即自由能、QGP中重夸克对的内能以及近期由HotQCD合作组提出的未屏蔽势。 我们发现，自由能势高估了LHC中重离子碰撞中的charm产生，而在三种势中，未屏蔽势产生的结果最接近ALICE合作组的实验数据。 显示英文摘要

摘要： Heavy quark mass in QGP is related to the heavy quark potential at a large distance. In this study we test three different heavy quark potentials, namely, the free energy, the internal energy of the heavy quark pair in QGP, and the unscreened potential, which was recently proposed by the HotQCD Collaboration, through the thermal production of charm quarks in heavy-ion collisions at the LHC. We find that the free energy potential overestimates charm production in heavy-ion collisions at the LHC, while the unscreened potential produces results closest to the experimental data from the ALICE Collaboration among the three potentials.