CCFM中的非线性演化：相干和饱和之间的相互作用
Non-linear evolution in CCFM: The interplay between coherence and saturation
摘要：
我们解决的CCFM方程数值的存在下，有效地结合了非线性动力学的边界条件。我们保留了未积分胶子分布对相干尺度的完全依赖性，并提取了饱和动量。由此产生的饱和尺度是快度和相干动量的函数。在深度非弹性散射中，除了通常的x-Bjorken依赖性之外，这将导致饱和度依赖于光子虚拟性。在渐近能量下，微扰非线性物理和QCD相干性之间的相互作用导致了一种有趣而新颖的动力学，其中饱和动量本身最终饱和。我们还研究了“非Sudakov”形状因子的各种实现。它示出的非线性动力学导致几乎相同的结果为不同的形状因子。最后，不同的选择规模的运行耦合进行了分析和影响的现象学进行了讨论。
英文摘要：
We solve the CCFM equation numerically in the presence of a boundary condition which effectively incorporates the non-linear dynamics. We retain the full dependence of the unintegrated gluon distribution on the coherence scale, and extract the saturation momentum. The resulting saturation scale is a function of both rapidity and the coherence momentum. In Deep Inelastic Scattering this will lead to a dependence of the saturation scale on the photon virtuality in addition to the usual x-Bjorken dependence. At asymptotic energies the interplay between the perturbative non-linear physics, and that of the QCD coherence, leads to an interesting and novel dynamics where the saturation momentum itself eventually saturates. We also investigate various implementations of the "non-Sudakov" form factor. It is shown that the non-linear dynamics leads to almost identical results for different form factors. Finally, different choices of the scale of the running coupling are analyzed and implications for the phenomenology are discussed.
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