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arXiv 1601.03070hep-phnucl-exnucl-th
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小系统中的直接光子产生和喷流能量损失

Direct photon production and jet energy-loss in small systems

Chun Shen, Chanwook Park, Jean-François Paquet, Gabriel S. Denicol, Sangyong Jeon, Charles Gale

摘要:

在快速膨胀的小液滴夸克-胶子等离子体背景中研究了两种穿透探针:直接光子和QCD喷注。额外的热电磁辐射导致直接光子的$\sim$ 50\%增强。在高多重数p+Pb碰撞中,喷流会损失相当大一部分初始能量,导致横动量约为10\,GeV的$\sim$ 0. 8的带电强子$R_\mathrm{pA}$。这两个拟议的测量可以帮助理解在小型碰撞系统中观察到的明显的集体行为。

英文摘要:

Two types of penetrating probes, direct photon and QCD jets, are investigated in the background of a small and rapidly expanding droplet of quark-gluon plasma. The additional thermal electromagnetic radiation results in a $\sim$50\% enhancement of the direct photons. In high multiplicity p+Pb collisions, jets can lose a sizeable fraction of their initial energy, leading to a charged hadron $R_\mathrm{pA}$ of $\sim$0.8 at a transverse momentum around 10\,GeV. Those two proposed measurements can help understand the apparent collective behaviour observed in small collision systems.

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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