Multiplicity fluctuation and correlation of identified baryons in a quark combination model
Multiplicity fluctuation and correlation of identified baryons in a quark combination model
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夸克组合模型中已识别重子的多重性波动和相关性
DOI：
10.1103/physrevc.95.014901
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发表时间：
2016-09
影响因子：
3.1
通讯作者：
Feng-lan Shao
中科院分区：
文献类型：
--
作者：
Jun Song;Hai-hong Li;Rui-qin Wang;Feng-lan Shao
在夸克组合模型下，系统地研究了体夸克系统强子化产生的重子和反重子多重数分布的动力学涨落和关联。从研究多重性所必需的最基本的夸克组合动力学出发，分析了给定夸克数和反夸克数的夸克系统强子化后，重子的包容多重性分布、两重子多重性关联和重子-反重子多重性关联的矩（方差、偏度和峰度）.我们获得了一系列有趣的发现，例如，多重数矩的二项式行为、符合味相关的重子-反重子关联和普适重子-反重子关联等可视为夸克组合的一般特征。我们进一步考虑强子化前夸克数的关联和涨落，研究它们对重子和反重子多重产生的影响。我们发现夸克数涨落和味守恒导致了一系列重要结果，如负p\bar{\Omega}^{+}$多重关联和普适的两重子关联.我们还研究了共振衰减的影响，以比较我们的结果与未来的实验数据在LHC的超相对论重离子碰撞。
The dynamical fluctuation and correlation of multiplicity distributions of identified baryons and antibaryons produced by the hadronization of the bulk quark system are systematically studied in quark combination model. Starting from the most basic dynamics of quark combination which are necessary for multiplicity study, we analyze moments (variance, skewness and kurtosis) of inclusive multiplicity distribution of identified baryons, two-baryon multiplicity correlations, and baryon-antibaryon multiplicity correlations after the hadronization of quark system with given quark number and antiquark number. We obtain a series of interesting findings, e.g., binomial behavior of multiplicity moments, coincide flavor dependent two-baryon correlation and universal baryon-antibaryon correlation, which can be regarded as general features of quark combination. We further take into account correlations and fluctuations of quark numbers before hadronization to study their influence on multiple production of baryons and antibaryons. We find that quark number fluctuation and flavor conservation lead to a series of important results such as the negative $p\bar{\Omega}^{+}$ multiplicity correlation and universal two-baryon correlations. We also study the influence of resonance decay in order to compare our results with future experimental data in ultra-relativistic heavy ion collisions at LHC.