Gluon- and quark-jet multiplicities with NNNLO and NNLL accuracy.
Gluon- and quark-jet multiplicities with NNNLO and NNLL accuracy.
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具有 NNNLO 和 NNLL 精度的胶子和夸克喷射多重性
DOI：
10.1103/physrevlett.109.242002
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发表时间：
2012
影响因子：
8.6
通讯作者：
A. V. Kotikov
中科院分区：
文献类型：
--
作者：
P. Bolzoni;B. A. Kniehl;A. V. Kotikov
我们提出了一种新的方法来考虑并包括对胶子和夸克喷流多重性的微扰和非微扰贡献。由于这种新方法，我们第一次包含了对这些量的新贡献，得到了倒数第二的对数恢复公式。我们的解析表达式依赖于两个具有清晰和简单物理解释的非摄动参数。这两个量的全局拟合显示了我们的结果如何解决了数据理论描述中长期存在的差异。
We present a new approach to consider and include both the perturbative and the nonperturbative contributions to the multiplicities of gluon and quark jets. Thanks to this new method, we have included for the first time new contributions to these quantities obtaining next-to-next-to-leading-logarithmic resummed formulas. Our analytic expressions depend on two nonperturbative parameters with a clear and simple physical interpretation. A global fit of these two quantities shows how our results solve a long-standing discrepancy in the theoretical description of the data.