论文标题
$ g \ to c \ bar {c} $分裂的中等修饰
Medium-modifications of $g\to c \bar{c}$ splitting
论文作者
论文摘要
我们研究将Gluon分裂成夸克和反夸克对的中型修饰。应用Baier-Dokshitzer-Mueller-Peigné-Schiff和Zakharov（BDMPS-Z）形式主义，我们得出了一个$ g \ g \ q \ bar {q} $ splating unctity ot-eikonal限制中的Q \ bar {q} $ splitting函数的路径积分公式。我们的分析表明，质量上有两个不同的介质效应：横向动量扩大$ q \ bar {q} $对，并增强了这种对的产生。我们注意到，如果从培养基到Parton的平均动量转移在夸克质量尺度上，则两种效果在数值上都是很大的。在超偏见的重型离子碰撞中，这种情况是由魅力夸克（Charm Quarks）实现的，因此，我们将数值分析集中在$ g \ \ g \的中间模式上，以c \ bar {c} $分裂。
We study medium-modifications of the gluon splitting into a quark and anti-quark pair. Applying the Baier-Dokshitzer-Mueller-Peigné-Schiff and Zakharov (BDMPS-Z) formalism, we derive a path-integral formula for the in-medium $g\to q \bar{q}$ splitting function in the close-to-eikonal limit. Our analysis shows that there are two qualitatively different medium effects: transverse momentum broadening of $q \bar{q}$ pairs and enhanced production of such pairs. We note that both effects are numerically sizeable if the average momentum transfer from the medium to the parton is at the quark mass scale. In ultra-relativistic heavy-ion collisions, this condition is realized by charm quarks, therefore we focus our numerical analysis on the medium-modifications of $g\to c \bar{c}$ splitting.
