重夸克相对于轻部分子的能量损失;重夸克的辐射能量损失是反常的吗？
Energy loss for heavy quarks in relation to light partons; is radiative energy loss for heavy quarks anomalous?
摘要：
比较了$\sqrt{s_{NN}}=200$ GeV下Au + Au碰撞中非光子电子（$e^{\pm}$）和中性π介子（$π^0$）的喷流抑制测量的标度特性.对于宽范围的横向动量和碰撞中心，比较是一致的喷流淬火为主的辐射能量损失的重和轻的部分子。通过$e^{\pm}$，重夸克的猝灭较少;这给出了输运系数$\hat{q}$的独立估计，与通过$π^0$的轻部分子猝灭得到的输运系数大小一致。
英文摘要：
The scaling properties of jet suppression measurements are compared for non-photonic electrons ($e^{\pm}$) and neutral pions ($π^0$) in Au + Au collisions at $\sqrt{s_{NN}}=200$ GeV. For a broad range of transverse momenta and collision centralities, the comparison is consistent with jet quenching dominated by radiative energy loss for both heavy and light partons. Less quenching is indicated for heavy quarks via $e^{\pm}$; this gives an independent estimate of the transport coefficient $\hat{q}$ that agrees with its magnitude obtained from quenching of light partons via $π^0$'s.
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