Pseudorapidity dependence of short-range correlations from a multi-phase transport model
Pseudorapidity dependence of short-range correlations from a multi-phase transport model
复制标题
多相传输模型中短程相关性的伪快速依赖性
DOI：
10.1088/1674-1137/40/3/034105
复制
发表时间：
2016
影响因子：
3.6
通讯作者：
Wu Yuan-Fang
中科院分区：
文献类型：
--
作者：
Wang Mei-Juan;Chen Gang;Ma Guo-Liang;Wu Yuan-Fang
利用一个包含初始部分子和强子相互作用的多相输运模型，我们研究了在室温下Au+Au碰撞中，相邻仓多重数关联随赝快度的变化。结果表明，对于Au+Au碰撞，末态粒子的短程关联在中心赝快度处有一个低谷，而对于Au Au碰撞，末态粒子的短程关联在中心赝快度处有一个峰值.我们的研究结果表明，短程关联的赝快度依赖性应该包含一些新的物理信息，而不是末态粒子赝快度分布的简单结果。比较了考虑和不考虑强子散射的AMPT结果。结果表明，强子散射只能在一定程度上增加短程关联，而不是导致不同能量下关联形状不同的原因。进一步的研究表明，短程关联的不同赝快度依赖性主要是由于部分子演化和随后的强子化方案。
Using a multi-phase transport model (AMPT) that includes both initial partonic and hadronic interactions, we study neighboring bin multiplicity correlations as a function of pseudorapidity in Au+Au collisions at . It is observed that for Au+Au collisions, the short-range correlations of final particles have a trough at central pseudorapidity, while for AuAu collisions, the short-range correlations of final particles have a peak at central pseudorapidity. Our findings indicate that the pseudorapidity dependence of short-range correlations should contain some new physical information, and are not a simple result of the pseudorapidity distribution of final particles. The AMPT results with and without hadronic scattering are compared. It is found that hadron scattering can only increase the short-range correlations to some level, but is not responsible for the different correlation shapes for different energies. Further study shows that the different pseudorapidity dependence of short-range correlations are mainly due to partonic evolution and the following hadronization scheme.