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arXiv 1806.04723hep-phnucl-th
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夸克-胶子等离子体中快胶子-胶子对的颜色随机化

Color randomization of fast gluon-gluon pairs in the quark-gluon plasma

B. G. Zakharov

摘要:

本文研究了夸克-胶子等离子体中一个初级快胶子分裂后产生的双胶子态的颜色随机化。我们发现,在LHC条件下的颜色随机化的$gg$对是相当缓慢的。在喷流能量$E=100$和$500$ GeV,在中心Pb+Pb碰撞的等离子体中的典型喷流路径长度,$gg$对的$SU(3)$多重峰平均颜色Casimir与其完全随机化的$gg$状态的值$2N_c$有很大不同。我们计算了近共线十重态$gg$产生的能量依赖关系,结果表明,在$p_T\gtrsim 10$ GeV处,反常十重态对重子产生的贡献应该变小.

英文摘要:

We study the color randomization of two-gluon states produced after splitting of a primary fast gluon in the quark-gluon plasma. We find that for the LHC conditions the color randomization of the $gg$ pairs is rather slow. At jet energies $E=100$ and $500$ GeV, for typical jet path length in the plasma in central Pb+Pb collisions, the $SU(3)$-multiplet averaged color Casimir of the $gg$ pair differs considerably from its value $2N_c$ for a fully randomized $gg$ state. Our calculations of the energy dependence for generation of the nearly collinear decuplet $gg$ states, that can lead to the baryon jet fragmentation, show that the contribution of the anomalous decuplet color states to the baryon production should become small at $p_T\gtrsim 10$ GeV.

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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