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arXiv 0907.4813nucl-ex
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PHENIX中重味产生和能量损失的双粒子相关性

Heavy Flavor Production and Energy Loss with Two-Particle Correlations at PHENIX

Tatia Engelmore

摘要:

重夸克是研究重离子碰撞中产生的热的、稠密的介质的一个有价值的探针,也是对提出的能量损失机制的一个重要检验。人们发现单个非光子电子被抑制在与轻强子相似的水平,这意味着轻和重部分子之间的能量损失水平相当。由于理论很难解释重夸克能量损失的水平,因此更好地理解魅力和底部抑制至关重要。电子-强子关联在PHENIX被用来研究p+p和Au+Au碰撞中的重味。在p+p中,通过对D介子的部分重建,利用质量关联测量了粲与底产生的比值。电子-强子角关联也被用来研究重味的介质修正,我们看到了能量损失效应的暗示。对相关电子-μ子对的补充研究提供了在尚未研究的快度范围内产生重味的清晰测量。

英文摘要:

Heavy quarks are a valuable probe of the hot, dense medium created in a heavy ion collision, and are an important test of proposed mechanisms of energy loss. It was discovered that single non-photonic electrons are suppressed at a similar level to light hadrons, implying a comparable level of energy loss between light and heavy partons. Because theory has had a difficult time explaining the level of heavy quark energy loss, it is crucial to better understand charm and bottom suppression. Electron-hadron correlations have been used at PHENIX to study heavy flavor in both p+p and Au+Au collisions. In p+p the ratio of charm to bottom production has been measured using mass correlations through a partial reconstruction of the D meson. Electron-hadron angular correlations have also been used to study medium modification of heavy flavor, and we see hints of energy loss effects. A complementary study of correlated electron-muon pairs provides a clean measurement of heavy flavor production in a rapidity range not yet studied.

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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