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arXiv 1402.0789hep-ph
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独立DGLAP发展方程关于硬坡密子行为的近似解的解析方法

Analytic Approach to the Approximate Solution of the Independent DGLAP Evolution Equations with Respect to the Hard-Pomeron Behavior

B. Rezaei, G. R. Boroun

摘要:

我们证明了在低$x$下,硬坡密子行为对胶子分布和单重态结构函数的影响是可能的。我们导出了胶子分布和单重态结构函数的二阶独立微分方程。在这种方法中,单重夸克和胶子在小$x$下具有相同的高能行为。这些方程是从次-首阶差分演化方程导出的。所有的结果都可以在微扰QCD的框架下得到一致的描述,表明随着$x$的减小,胶子分布和单重态结构函数增加。

英文摘要:

We show that it is possible to use hard-Pomeron behavior to the gluon distribution and singlet structure function at low $x$. We derive a second-order independent differential equation for the gluon distribution and the singlet structure function. In this approach, both singlet quarks and gluons have the same high-energy behavior at small $x$. These equations are derived from the next-to-leading order DGLAP evolution equations. All results can be consistently described in the framework of perturbative QCD, which shows an increase of gluon distribution and singlet structure functions as $x$ decreases.

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