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arXiv 2204.08641nucl-th
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相对论性重离子碰撞中强子的平均横动量关联

Averaged transverse momentum correlations of hadrons in relativistic heavy-ion collisions

Yan-ting Feng, Feng-lan Shao, Jun Song

备注：
10 pages, 7 figures
发表信息：
Phys. Rev. C 106, 034910, 2022
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摘要：

我们收集了在$\sqrt{s_{NN}}=$ 200、39、27、19.6、11.5、7.7 GeV的Au+Au碰撞和在$\sqrt{s_{NN}}=$ 2.76 TeV的Pb+Pb碰撞中，质子、$Λ$、$Ξ^{-}$、$Ω^{-}$和$ϕ$的中快度平均横动量（$\left\langle p_{T}\right\rangle $）的实验数据，发现这些强子的实验数据具有系统的相关性.在夸克$p_{T}$谱呈指数形式的情况下，利用夸克组合模型，在等速度组合近似下，导出了强子化时的强子$\left\langle p_{T}\right\rangle $的解析公式.我们使用它们成功地解释了$pΛ$、$ΛΞ^{-}$、$Ξ^{-}Ω^{-}$和$Ξ^{-}ϕ$对的$\left\langle p_{T}\right\rangle $数据中所表现出的系统相关性。我们也用它们来成功地解释在中央重离子碰撞在RHIC和LHC能量的$\left\langle p_{T}\right\rangle $作为$(dN_{ch}/dy)/(N_{part}/2)$的函数在中等快度的这些强子的规律性。我们的结果表明，强子化时组分夸克的自由度和组分夸克的等速组合对理解RHIC和LHC能区重子和$ϕ$介子的产生有重要作用.

英文摘要：

We compile experimental data for the averaged transverse momentum ($\left\langle p_{T}\right\rangle $) of proton, $Λ$, $Ξ^{-}$, $Ω^{-}$ and $ϕ$ at mid-rapidity in Au+Au collisions at $\sqrt{s_{NN}}=$ 200, 39, 27, 19.6, 11.5, 7.7 GeV and in Pb+Pb collisions at $\sqrt{s_{NN}}=$ 2.76 TeV, and find that experimental data of these hadrons exhibit systematic correlations. We apply a quark combination model with equal-velocity combination approximation to derive analytic formulas of hadronic $\left\langle p_{T}\right\rangle $ in the case of exponential form of quark $p_{T}$ spectra at hadronization. We use them to successfully explain the systematic correlations exhibited in $\left\langle p_{T}\right\rangle $ data of $pΛ$, $ΛΞ^{-}$, $Ξ^{-}Ω^{-}$ and $Ξ^{-}ϕ$ pairs. We also use them to successfully explain the regularity observed in $\left\langle p_{T}\right\rangle $ of these hadrons as the function of $(dN_{ch}/dy)/(N_{part}/2)$ at mid-rapidity in central heavy-ion collisions at both RHIC and LHC energies. Our results suggest that the constituent quark degrees of freedom and the equal-velocity combination of these constituent quarks at hadronization play important role in understanding the production of baryons and $ϕ$ meson at these RHIC and LHC energies.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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