On the zero crossing of the three-gluon vertex
On the zero crossing of the three-gluon vertex
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DOI：
10.1016/j.physletb.2016.08.065
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发表时间：
2016-10-10
影响因子：
4.4
通讯作者：
Zafeiropoulos, S.
中科院分区：
文献类型：
--
作者：
Athenodorou, A.;Binosi, D.;Zafeiropoulos, S.
我们报告了从大体积晶格模拟中获得的关于猝灭量子色动力学中三胶子顶点红外行为的新结果。我们研究的主要焦点是被称为“零交叉”的特征红外特征的出现，其起源与Faddeev-Popov幽灵的非摄动无质量密切相关。这种效应的出现在所分析的两种运动构型中的一种中是清晰可见的，并在施温格-戴森方程的框架中讨论了其理论起源。构造了对应于三胶子顶点的动量减法方案中的有效耦合，揭示了有效相互作用在零交叉的确切位置消失。(C) 2016年作者。Elsevier B.V.出版
We report on new results on the infrared behavior of the three-gluon vertex in quenched Quantum Chromodynamics, obtained from large-volume lattice simulations. The main focus of our study is the appearance of the characteristic infrared feature known as 'zero crossing', the origin of which is intimately connected with the nonperturbative masslessness of the Faddeev-Popov ghost. The appearance of this effect is clearly visible in one of the two kinematic configurations analyzed, and its theoretical origin is discussed in the framework of Schwinger-Dyson equations. The effective coupling in the momentum subtraction scheme that corresponds to the three-gluon vertex is constructed, revealing the vanishing of the effective interaction at the exact location of the zero crossing. (C) 2016 The Authors. Published by Elsevier B.V.