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arXiv 0904.0032hep-phnucl-th
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用光锥波函数方法研究QCD物质的重味动力学

A light-cone wavefunction approach to open heavy flavor dynamics in QCD matter

Rishi Sharma, Ivan Vitev, Ben-Wei Zhang

摘要:

利用因子化微扰QCD的算符定义,计算了D和B介子的最低阶魅力和美部分子分布函数和碎裂函数。在真空中,我们发现了由末态强子结构引起的主要修正。从晶格中提取的夸克-反夸克势证明了在临界温度附近QGP中存在开的重味束缚态解。我们提供了第一个结果的重夸克分布和衰变概率在共同运动的等离子体中的介质修改。在改进的热介质重味动力学微扰QCD描述中,我们将D和B介子的形成和解离与部分子能级的粲夸克和美夸克猝灭结合起来,分别预言了RHIC和LHC上Cu+Cu和Pb+Pb碰撞中重介子和非光子电子的抑制.

英文摘要:

We calculate the lowest order charm and beauty parton distribution functions in and fragmentation functions into D and B mesons using the operator definitions of factorized perturbative QCD. In the vacuum, we find the leading corrections that arise from the structure of the final-state hadrons. Quark-antiquark potentials extracted from the lattice are employed to demonstrate the existence of open heavy flavor bound-state solutions in the QGP in the vicinity of the critical temperature. We provide first results for the in-medium modification of the heavy quark distribution and decay probabilities in a co-moving plasma. In an improved perturbative QCD description of heavy flavor dynamics in the thermal medium, we combine D and B meson formation and dissociation with parton-level charm and beauty quark quenching to obtain predictions for the heavy meson and non-photonic electron suppression in Cu+Cu and Pb+Pb collisions at RHIC and the LHC, respectively.

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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