Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, USA.
Phys Rev Lett. 2009 Oct 2;103(14):142302. doi: 10.1103/PhysRevLett.103.142302. Epub 2009 Sep 30.
The scaling properties of jet-suppression measurements are compared for nonphotonic electrons (e+/-) and neutral pions (pi(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+/-; this gives an independent estimate of the transport coefficient q that agrees with its magnitude obtained from quenching of light partons via pi(0)'s.
喷射抑制测量的标度性质在 200GeV 的 Au+Au 碰撞中，对非光子电子（e+/−）和中性π介子（π0）进行了比较。在广泛的横动量和碰撞中心度范围内，比较结果与重和轻部分子的辐射能量损失主导的喷注淬火相一致。对于重夸克，e+/-显示出的淬火程度较低；这给出了传输系数 q 的独立估计，与通过 π0 对轻部分子的淬火获得的 q 的大小一致。
