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arXiv 1903.01993hep-phhep-exnucl-exnucl-th
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重离子碰撞中喷流截面的因式分解

Factorization of jet cross sections in heavy-ion collisions

Jian-Wei Qiu, Felix Ringer, Nobuo Sato, Pia Zurita

摘要:

我们提出了一种新的唯象方法来建立重离子环境中喷流截面的QCD因子化。从质子-质子碰撞中的因子分解出发,我们引入介质修正喷流函数来描述喷流与热而稠密的QCD介质的主导相互作用。为了可靠地确定新的喷流函数,从核修正因子的包容性射流在LHC的全球分析,使用蒙特卡罗抽样方法。我们发现,胶子喷流是显着更抑制由于介质的存在比夸克喷流。此外,我们观察到喷注半径的依赖性直接关系到夸克和胶子喷注的相对抑制。我们的方法可能有助于提高从数据中提取介质属性。

英文摘要:

We propose a new phenomenological approach to establish QCD factorization of jet cross sections in the heavy-ion environment. Starting from a factorization formalism in proton-proton collisions, we introduce medium modified jet functions to capture the leading interaction of jets with the hot and dense QCD medium. A global analysis using a Monte Carlo sampling approach is performed in order to reliably determine the new jet functions from the nuclear modification factor of inclusive jets at the LHC. We find that gluon jets are significantly more suppressed due to the presence of the medium than quark jets. In addition, we observe that the jet radius dependence is directly related to the relative suppression of quark and gluon jets. Our approach may help to improve the extraction of medium properties from data.

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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