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arXiv 0709.4452hep-ph
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RHIC和LHC上的重夸克动力学

Heavy-Quark Kinetics at RHIC and LHC

V. Greco, H. van Hees, R. Rapp

摘要:

在超相对论性核碰撞中,重夸克在反应的早期阶段产生于热平衡之外,它们的热化时间预计要比轻夸克大得多。另一方面,在重夸克扇区中可以设想一个强相互作用的QGP,这是由于在温度高达$\sim$ $2 T_{C}$的QGP中存在重-轻强子类共振。我们调查这样的国家采用相对论朗之万模拟的后果。强子化是由一个合并-碎裂计划。本文给出了LHC能区$D$和$B$介子的核修正因子和椭圆流的预言,并与RHIC条件下该模型的成功预言进行了比较。我们发现类似的重夸克热化效应在LHC和RHIC。

英文摘要:

In ultrarelativistic nuclear collisions heavy quarks are produced out of thermal equilibrium in the very early stage of the reaction and their thermalization time was expected to be considerably larger than that of light quarks. On the other hand, a strongly-interacting QGP can be envisaged in the heavy quark sector due to the presence of heavy-light hadron-like resonances in the QGP for temperatures up to $\sim$$2 T_{C}$. We investigate the consequences of such states employing a relativistic Langevin simulation. Hadronization is modeled by a coalescence-fragmentation scheme. We present the predictions for the nuclear modification factor and elliptic flow of $D$ and $B$ mesons at LHC energies and compare the results with the successful predictions of this model for RHIC conditions. We find similar heavy-quark thermalization effects at LHC and RHIC.

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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