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arXiv 2001.10689nucl-thhep-phnucl-ex
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$\sqrt{s_{NN}}=$ 5.02 TeV高多重数p-Pb碰撞中椭圆流的组分夸克数标度

Number of constituent quark scaling of elliptic flows in high multiplicity p-Pb collisions at $\sqrt{s_{NN}}=$ 5.02 TeV

Wenbin Zhao, Che Ming Ko, Yu-Xin Liu, Guang-You Qin, Huichao Song

摘要:

简要总结了我们最近在$\sqrt{s_{NN}}=$ 5.02 TeV高能重数p-Pb碰撞中强子椭圆流的组分夸克数标度的研究.通过在中等$p_T$下通过夸克合并模型产生强子、在低$p_T$下通过粘性流体动力学以及在高$p_T$下通过喷流碎裂,我们的$Hydro-Coal-Frag$模型提供了对$p_T$的很好的描述--在$p_T$范围从0到6 GeV的范围内,π子、K子和质子的光谱和微分椭圆流$v_2(p_T)$。我们的结果表明,包括夸克合并是必要的,以再现所观察到的近似NCQ标度的强子$v_2$在中间$p_T$在实验中,强烈表明部分子自由度的存在和夸克-胶子等离子体的形成在高多重数的p-Pb碰撞在LHC。

英文摘要:

We briefly summarize our recent study on the number of constituent quark (NCQ) scaling of hadron elliptic flows in high multiplicity p-Pb collisions at $\sqrt{s_{NN}}=$ 5.02 TeV. With the inclusion of hadron production via the quark coalescence model at intermediate $p_T$, the viscous hydrodynamics at low $p_T$, and jet fragmentation at high $p_T$, our $Hydro-Coal-Frag$ model provides a nice description of the $p_T$-spectra and differential elliptic flow $v_2(p_T)$ of pions, kaons and protons over the $p_T$ range from 0 to 6 GeV. Our results demonstrate that including the quark coalescence is essential for reproducing the observed approximate NCQ scaling of hadron $v_2$ at intermediate $p_T$ in experiments, indicating strongly the existence of partonic degrees of freedom and the formation of quark-gluon plasma in high multiplicity p--Pb collisions at the LHC.

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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