arXiv 1608.021732016-08nucl-th

椭圆流作为相对论重离子碰撞中$ψ(2S)$产生机制的探针

Elliptic flow as a probe for $ψ(2S)$ production mechanism in relativistic heavy ion collisions

Baoyi Chen

备注：: 6 pages, 4 figures. (implements of Wigner function for regeneration, and other discussions.)
发表信息：: Phys. Rev. C 95, 034908 (2017)
DOI：: 10.1103/PhysRevC.95.034908

摘要：

讨论了在$\sqrt{s_{NN}}=2.76$ TeV Pb-Pb碰撞中不同产生机制的$ψ(2S)$的椭圆流。如果最终的$ψ(2S)$主要来自于不相关的粲夸克和反粲夸克在$T\approx T_c$的复合，那么粲夸克和反粲夸克将携带体介质的大的集体流，这些集体流将被再生的$ψ(2S)$继承。这表明$ψ(2S)$的椭圆流大于$J/ψ$的椭圆流，其可以在$T\ge T_c$、$v_2^{ψ(2S)}>v_2^{J/ψ}$处再生。但如果最终的$ψ(2S)$主要来自于QGP的色屏蔽引起的$J/ψ\rightarrow ψ(2S)$的跃迁，则其椭圆流应接近于$J/ψ$的椭圆流，即$v_2^{ψ(2S)}\sim v_2^{J/ψ}$。因此，$ψ(2S)$椭圆流是研究相对论性重离子碰撞中椭圆流产生机制的灵敏探针。

英文摘要：

I discuss the elliptic flows of $ψ(2S)$ with different production mechanisms in $\sqrt{s_{NN}}=2.76$ TeV Pb-Pb collisions. If the final $ψ(2S)$s are mainly from the recombination of uncorrelated charm and anticharm quarks at $T\approx T_c$, charm and anticharm quarks will carry large collective flows of the bulk medium, which will be inherited by the regenerated $ψ(2S)$s. This indicates a larger elliptic flow of $ψ(2S)$ than that of $J/ψ$ which can be regenerated at $T\ge T_c$, $v_2^{ψ(2S)}>v_2^{J/ψ}$. However, if the final $ψ(2S)$s are mainly from the transitions of $J/ψ\rightarrow ψ(2S)$ caused by the color screening of QGP, its elliptic flow should be close to the elliptic flow of $J/ψ$, $v_2^{ψ(2S)}\sim v_2^{J/ψ}$. Therefore, $ψ(2S)$ elliptic flow is a sensitive probe for its production mechanisms in relativistic heavy ion collisions.

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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英文摘要：

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