Effective Field Theory for Jet Processes.
Effective Field Theory for Jet Processes.
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DOI：
10.1103/physrevlett.116.192001
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发表时间：
2015-08
影响因子：
8.6
通讯作者：
T. Becher;M. Neubert;L. Rothen;D. Shao
中科院分区：
文献类型：
--
作者：
T. Becher;M. Neubert;L. Rothen;D. Shao
涉及窄喷流的过程受到喷流张开角和喷流内外能量比的扰动修正。在有效场理论中分析锥形射流过程，我们发现，除了软场和共线场，它们的描述需要同时软和共线的射流的自由度。这些共线软粒子可以分辨出单个的共线部分子，从而导致高阶相关算符的复杂的多威尔逊线结构。我们的有效场论第一次为锥喷流过程提供了一个因式分解公式，它完全分离了不同能量尺度下的物理学。它的重正化群方程控制了所有的数学上增强的高阶项，特别是非线性项。
Processes involving narrow jets receive perturbative corrections enhanced by logarithms of the jet opening angle and the ratio of the energies inside and outside the jets. Analyzing cone-jet processes in effective field theory, we find that in addition to soft and collinear fields their description requires degrees of freedom that are simultaneously soft and collinear to the jets. These collinear-soft particles can resolve individual collinear partons, leading to a complicated multi-Wilson-line structure of the associated operators at higher orders. Our effective field theory provides, for the first time, a factorization formula for a cone-jet process, which fully separates the physics at different energy scales. Its renormalization-group equations control all logarithmically enhanced higher-order terms, in particular also the nonglobal logarithms.