Multiplicity fluctuation and correlation of mesons and baryons in ultra-relativistic heavy-ion collisions at the LHC

Multiplicity fluctuation and correlation of mesons and baryons in ultra-relativistic heavy-ion collisions at the LHC
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大型强子对撞机超相对论重离子碰撞中介子和重子的多重波动和相关性

DOI:
10.1088/1674-1137/42/1/014102
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发表时间:
2017-09
期刊:
影响因子:
3.6
通讯作者:
Jun Song
Jun Song
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Hai-hong Li;Feng-lan Shao;Jun Song

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在超相对论重离子碰撞的背景下,我们研究了夸克组合机制强子化过程中产生的已识别介子和重子的多重数涨落和关联。基于自由夸克组合的统计方法,我们导出了两强子多重数关联,包括介子-介子和介子-重子关联,并利用泰勒展开法考虑了强子化过程中夸克数涨落的影响.在计入衰变贡献后,我们计算了K π,p π和Kp对的动力学涨落观测值ν dyn,并通过与s NN = 2.76 TeV的Pb-Pb碰撞数据以及HIJING和AMPT事件发生器的模拟结果进行比较,讨论了可以得到的基本物理。
We study the multiplicity fluctuation and correlation of identified mesons and baryons formed at hadronization by the quark combination mechanism in the context of ultra-relativistic heavy-ion collisions. Based on the statistical method of free quark combination, we derive the two-hadron multiplicity correlations, including meson-meson and meson-baryon correlations, and take the effects of quark number fluctuation at hadronization into account by a Taylor expansion method. After including the decay contributions, we calculate the dynamical fluctuation observable ν dyn for K π , p π and Kp pairs and discuss what underlying physics can be obtained by comparing with data from Pb-Pb collisions at s NN = 2.76 TeV and simulations from the HIJING and AMPT event generators.
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影响因子: --
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