论文标题
QCD中散射幅度的散射幅度流动不正确
An incorrect pre-asymptotic RG flow of scattering amplitudes in QCD towards the unitarity limit
论文作者
论文摘要
QCD中的散射幅度表现出明确的RG流动，其能量朝向单位性极限。在本文中，我们提出了一个进化方程式，该方程式可以连续修改临时RG流向威尔逊线相关器的“饱和”。它保留线性不稳定的零场固定点和单位性极限吸引子。我们以适合有效的数值解的形式呈现演化方程。因此，原则上提出的进化方程允许我们不正确的杂种RG流向QCD的BK/JIMWLK流动的现象学比较。最终，这可能会导致对单位性方法的观察约束，从而将其限制为QCD之一。然而，似乎仅在RHIC的P+A碰撞的正向区域中的单包粒子光谱并不能对进化产生严格的约束。
Scattering amplitudes in QCD exhibit a definite RG flow with energy towards the unitarity limit. In this paper we put forward an evolution equation which allows one to modify continuously the pre-asymptotic RG flow towards "saturation" of Wilson line correlators. It preserves the linearly unstable zero field fixed point and the unitarity limit attractor. We present the evolution equations in a form suitable for efficient numerical solution. Hence, the proposed evolution equation in principle permits phenomenological comparisons of our incorrect pre-asymptotic RG flows to the BK/JIMWLK flow of QCD. Ultimately, it may lead to observational constraints on the approach to unitarity, constraining it to be specifically the one of QCD. However, it appears that single-inclusive particle spectra in the forward region of p+A collisions at RHIC alone do not provide stringent constraints on the evolution.
