论文标题
$ \ sqrt {s_ {nn}} = 5.02 $ tev
Event-by-event anti-deuteron multiplicity fluctuation in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
论文作者
论文摘要
使用基于音乐流体动力学和灌注式HADRONIC转运的动力学冻结核子的Nucleon合并模型，我们研究了抗Deuteron的生产及其在$ \ sqrt {s_ s_ {nn}} = 5.02 $ tev中的PB+PB碰撞中的事件波动。我们发现对外围碰撞中的抗抑制剂与抗蛋白质的产量比有明显的抑制，这与爱丽丝协作的测量结果一致。还发现，在所有碰撞中心中的抗脱核多重性分布的泊松事件波动，这与简单合并模型计算的预测不同，该预测假定所有抗蛋白质和抗胰蛋白酶具有相同的可能性形成抗deuterons的可能性。我们进一步发现，由于巴属保护，抗deuteron和抗蛋白质多重性分布之间存在小的负相关性。
Using the nucleon coalescence model based on kinetic freeze-out nucleons from the hybrid model of MUSIC hydrodynamics and UrQMD hadronic transport, we study the production of anti-deuteron and its event-by-event fluctuation in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV. We find a clear suppression of the anti-deuteron to antiproton yield ratio in peripheral collisions, which is in accordance with the measurements from the ALICE Collaboration. Also found is a Poissonian event-by-event fluctuation of the anti-deuteron multiplicity distribution in all collision centralities, which is different from the prediction of a simple coalescence model calculation that assumes all antiproton and antineutron pairs to have the same probability to form anti-deuterons. We further find a small negative correlation between the anti-deuteron and antiproton multiplicity distributions as a result of the baryon conservation.
