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arXiv 2609.33821hep-ph

非线性QCD演化中的方案变换:迈向稳定的NLO BK方程

Scheme Transformations in Non-Linear QCD Evolution: Towards a Stable NLO BK Equation

  • Institute of Theoretical Physics, Jagiellonian University(雅盖隆大学理论物理研究所)
  • Physics Department, Brookhaven National Laboratory(布鲁克海文国家实验室物理部)

机构由 AI 辅助整理,请以论文原文为准。

Renaud Boussarie, Paul Caucal, Piotr Korcyl, Yacine Mehtar-Tani

中文总结 AI 辅助

针对NLO BK方程因双共线对数导致的不稳定性,本文用Doi-Peliti形式论建立方案变换框架,消除该对数,使方程在Y=10内稳定演化,为结合NLO演化与冲击因子提供路径。

中文摘要 AI 辅助

高能QCD在NLO阶的演化受到大共线对数的影响,这使得Balitsky-Kovchegov(BK)方程的微扰展开不稳定。我们利用Doi-Peliti形式论发展了一个系统的方案变换框架,以关联弹射体($k^+$)与靶($k^-$)因子化方案。高能算子与演化核的变换生成了NLO项,这些项抵消了有问题的双共线对数。由此得到的NLO BK方程不再具有这种不稳定性,仅剩下单共线增强和双反共线增强。数值解表明,对于Golec-Biernat-Wusthoff和McLerran-Venugopalan两种初始条件,演化在$Y=10$以内都是稳定的,这为将稳定的NLO演化与旋转的NLO冲击因子相结合提供了一条一致的路径。

英文摘要

High-energy QCD evolution at NLO suffers from large collinear logarithms that make the perturbative expansion of the Balitsky-Kovchegov (BK) equation unstable. We develop a systematic scheme-transformation framework using the Doi-Peliti formalism to relate projectile ($k^+$) and target ($k^-$) factorization schemes. The transformation of high-energy operators and the evolution kernel generates NLO terms that cancel the problematic double collinear logarithm. The resulting NLO BK equation is free of this instability, with only single collinear and double anti-collinear enhancements remaining. Numerical solutions show stable evolution up to $Y=10$ for both Golec-Biernat-Wusthoff and McLerran-Venugopalan initial conditions, providing a consistent path toward combining stable NLO evolution with rotated NLO impact factors.

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