Jet rates in electron-positron annihilation at O(alpha(s)3) in QCD.
Jet rates in electron-positron annihilation at O(alpha(s)3) in QCD.
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QCD 中 O(alpha(s)3) 处电子-正电子湮灭的射流速率。
DOI：
10.1103/physrevlett.100.172001
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发表时间：
2008
影响因子：
8.6
通讯作者：
G. Heinrich
中科院分区：
文献类型：
--
作者：
A. Ridder;T. Gehrmann;E. Glover;G. Heinrich
我们计算了在QCD耦合常数为三阶的正负电子湮灭中两个、三个、四个和五个喷流的产生率。在这个顺序下，三射流产生在微扰理论中被描述为次-领先顺序，而两射流速率在次-领先顺序下被获得。我们的研究结果产生一个改进的微扰描述的依赖射流的分辨率参数y{切}，特别是在小值的y{切}的射流多重性。
We compute production rates for two, three, four, and five jets in electron-positron annihilation at the third order in the QCD coupling constant. At this order, three-jet production is described to next-to-next-to-leading order in perturbation theory while the two-jet rate is obtained at next-to-next-to-next-to-leading order. Our results yield an improved perturbative description of the dependence of jet multiplicity on the jet resolution parameter y{cut}, particularly at small values of y{cut}.