流体动力学块体介质中射流猝灭模型对实验数据的约束拟合
Constraint fitting of experimental data with a jet quenching model embedded in a hydrodynamical bulk medium
摘要：
我们提出了一个全球性的拟合，以单，双包容性的抑制数据的高$p_T$粒子在中央金+金碰撞在顶部RHIC能量。我们还包括在这个分析数据的重夸克通过其D和B介子半轻子衰变（即非光子电子）。分析是基于部分子淬火重量的BDMPS近似计算的介质诱导胶子辐射，然后嵌入在流体动力学描述的散装介质。我们的研究结果表明，传输系数$\hat q$的值大于四倍以上的扰动估计是首选的实验数据。这证实了先前基于介质几何结构的更简单实现或仅单包含抑制的计算。我们还评论的统计相容性的重夸克数据内的辐射唯一的能量损失的情况下，和核修改的部分子分布函数（PDF）的结果的敏感性和假设的能量损失的时间在碰撞之前的流体动力学行为。}
英文摘要：
We present a global fit to single- and double-inclusive suppression data of high-$p_T$ particles in central Au+Au collisions at top RHIC energy. We also include in this analysis data on heavy quarks via their D and B meson semi-leptonic decays (i.e. non-photonic electrons). The analysis is based on the parton quenching weights for medium-induced gluon radiation computed in the BDMPS approximation then embedded in a hydrodynamical description of the bulk medium. Our results indicate that values of the transport coefficient $\hat q$ more than four times larger than perturbative estimates are preferred by experimental data. This confirms previous calculations based on simpler implementations of the medium geometry or only the single-inclusive suppression. We also comment on the statistical compatibility of the heavy quark data within a radiative only energy loss scenario, and on the sensitivity of the results to nuclear modification of the parton distribution functions (PDFs) and to assumptions on the energy loss during times in the collision prior to the hydrodynamical behavior.}
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