Quark number scaling of pT spectra for Ω and ϕ in relativistic heavy-ion collisions
Quark number scaling of pT spectra for Ω and ϕ in relativistic heavy-ion collisions
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DOI：
10.1103/physrevc.102.014911
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发表时间：
2019-11
影响因子：
3.1
通讯作者：
Jun Song;Feng-lan Shao;Z. Liang
中科院分区：
文献类型：
--
作者：
Jun Song;Feng-lan Shao;Z. Liang
我们发现，在从RHIC到LHC的较宽能量范围内，重离子碰撞中$\Omega$重子和$\phi$介子的中快度横动量谱的实验数据都表现出组分夸克数标度.这种标度行为是夸克等速组合机制的直接结果，并提供了一种非常方便的方法来提取强子化时奇异夸克的p {T}$谱。我们提出的结果，从现有的数据和研究的性质，特别是平均横向动量$\langle p_{T}\rangle$和横向径向流速$\langle\beta\rangle$的能量依赖与流体动力学激发的爆炸波模型的奇异夸克。
We show that the experimental data of transverse momentum ($p_{T}$) spectra of $\Omega$ baryon and $\phi$ meson at mid-rapidity in heavy-ion collisions exhibit the constituent quark number scaling in a wide energy range from RHIC to LHC. Such a scaling behavior is a direct consequence of quark combination mechanism via equal velocity combination and provides a very convenient way to extract the $p_{T}$ spectrum of strange quarks at hadronization. We present the results of strange quarks obtained from the available data and study the properties in particular the energy dependence of the averaged transverse momentum $\langle p_{T}\rangle$ and the transverse radial flow velocity $\langle\beta\rangle$ with a hydrodynamics-motivated blast-wave model.