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arXiv 0705.4443nucl-thhep-ph
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sqrt(S)=200 GeV Au+Au碰撞中的粲偶素动力学

Charmonium dynamics in Au+Au collisions at sqrt(S)=200 GeV

O. Linnyk, E. L. Bratkovskaya, W. Cassing, H. Stoecker

摘要:

本文用HSD输运方法研究了RHIC顶能sqrt(S)=200 GeV的Au+Au反应中J/Psi、Chi_c和Psi-素介子的形成和抑制动力学。两个突出的模型,这已经讨论了十多年,被纳入,即“强子comover吸收和重组”模型以及“QGP阈值”的情况下,并与现有的实验数据进行了比较。我们的研究表明,这两种方案-兼容的SPS能量的实验观察-严重失败的RHIC能量。这种结合的分析--再加上对魅力椭圆流的低估--证明了c,c-条夸克的动力学是由强QGP(sQGP)中的部分子相互作用主导的,既不能用“强子”相互作用来模拟,也不能单独用色屏蔽来描述。

英文摘要:

The formation and suppression dynamics of J/Psi, Chi_c and Psi-Prime mesons is studied within the HSD transport approach for Au+Au reactions at the top RHIC energy of sqrt(S)=200 GeV. Two prominent models, which have been discussed for more than a decade, are incorporated, i.e. the 'hadronic comover absorption and reformation' model as well as the 'QGP threshold' scenario, and compared to available experimental data. Our studies demonstrate that both scenarios - compatible with experimental observation at SPS energies - fail severely at RHIC energies. This combined analysis - together with the underestimation of charm elliptic flow - proves that the dynamics of c, c-bar quarks are dominated by partonic interactions in the strong QGP (sQGP) and can neither be modeled by 'hadronic' interactions nor described appropriately by color screening alone.

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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