Production of soft dileptons in the quark-gluon plasma.
Production of soft dileptons in the quark-gluon plasma.
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DOI：
10.1103/physrevlett.64.2242
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发表时间：
1990-05
影响因子：
8.6
通讯作者：
E. Braaten;R. Pisarski;T. Yuan
中科院分区：
文献类型：
--
作者：
E. Braaten;R. Pisarski;T. Yuan
通过对微扰理论的系统重申，计算了热夸克-胶子等离子体中软双轻子的产生率，得到了QCD耦合常数的首阶。由于货车霍韦奇性，软夸克和反夸克湮灭和衰变的部分速率呈现出意想不到的结构--尖峰。这些峰值被涉及硬夸克和胶子的过程的部分速率所淹没。软双轻子的总速率比朴素的单圈预测大几个数量级。
The production rate for soft dileptons in a hot quark-gluon plasma is computed to leading order in the QCD coupling constant through a systematic resummation of perturbation theory. The partial rate from the annihilation and decay of soft quarks and antiquarks exhibits unexpected structure---sharp peaks due to Van Hove singularities. These peaks are overwhelmed by the partial rate from processes involving hard quarks and gluons. The total rate for soft dileptons is larger than the naive one-loop prediction by orders of magnitude.