Jet quenching in thin quark–gluon plasmas I: formalism
Jet quenching in thin quark–gluon plasmas I: formalism
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DOI：
10.1016/s0550-3213(99)00713-0
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发表时间：
1999-07
期刊：
影响因子：
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通讯作者：
M. Gyulassy;P. Lévai;I. Vitev
中科院分区：
文献类型：
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作者：
M. Gyulassy;P. Lévai;I. Vitev
计算了核碰撞中硬喷注沿着产生的胶子角分布的修正和放大。我们考虑了薄夸克胶子等离子体的极限，其中喷注和胶子的重散射数很小。重点是喷射淬火与形成高度离壳层部分子在涉及核硬散射事件。初始硬辐射振幅之间的干扰，多个诱导的Gunion-Bertsch辐射振幅，和胶子再散射振幅导致的角分布，显着不同的标准DGstrom演化和从经典的极限部分子级联。单重散射和双重散射的情况下被认为是详细的，和一个系统的方法来计算所有的矩阵元素的一般情况下开发。一个简单的幂律缩放的角分布与不断增加的再散射的数量被发现，并用于作为等离子体厚度的函数的分数能量损失的估计。
The modification and amplification of the gluon angular distribution produced along with hard jets in nuclear collisions is computed. We consider the limit of a thin quark–gluon plasma, where the number of rescatterings of the jet and gluons is small. The focus is on jet quenching associated with the formation of highly off-shell partons in hard scattering events involving nuclei. The interference between the initial hard radiation amplitude, the multiple induced Gunion–Bertsch radiation amplitudes, and gluon rescattering amplitudes leads to an angular distribution that differs considerably from both the standard DGLAP evolution and from the classical limit parton cascading. The cases of a single and double rescattering are considered in detail, and a systematic method to compute all matrix elements for the general case is developed. A simple power law scaling of the angular distribution with increasing number of rescatterings is found and used for estimates of the fractional energy loss as a function of the plasma thickness.