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arXiv 0710.2599nucl-ex
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利用开粲介子的电子方位角关联测量重味关联

Heavy-flavor correlation measurements via electron azimuthal correlations with open charm mesons

A. Mischke

摘要:

本文首次报道了在RHIC上对p+p碰撞中两个重味粒子关联的STAR测量。重味(魅力和底部)事件的识别和分离的统计基础上的方位角相关的衰变电子和开放的魅力介子,产生重要的信息有关的生产机制。方位相关分布呈现双峰结构,这可以归因于近侧的B衰变和远侧的主要魅力对生产。使用PYTHIA和MC@NLO事件发生器的专用模拟支持这些假设。这种新的相关技术将允许在重离子碰撞中对重夸克进行全面的能量损失测量。

英文摘要:

We report first STAR measurement on two heavy-flavor particle correlations in p+p collisions at RHIC. Heavy-flavor (charm and bottom) events are identified and separated on a statistical basis by the azimuthal correlation of their decay electrons and open charm mesons, which yield important information about the underlying production mechanism. The azimuthal correlation distribution exhibits a two-peak structure which can be attributed to B decays on the near-side and predominantly charm pair production on the away-side. These assumptions are supported by dedicated simulations using PYTHIA and MC@NLO event generators. This novel correlation technique will allow comprehensive energy-loss measurements of heavy quarks in heavy-ion collisions.

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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