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arXiv 1402.0174hep-ph
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低x下胶子分布和次领先阶单重态结构函数的独立DGLAP演化方程的解

Solutions of Independent DGLAP Evolution Equations for the Gluon Distribution and Singlet Structure Functions in the Next-to-Leading Order at Low x

G. R. Boroun

摘要:

在低$x$条件下,基于硬坡密子交换,在微扰理论的次领先阶下,我们给出了一组独立的公式,从它对$lnQ^{2}$的导数中提取胶子分布和单重态结构函数.在这种方法中,单重态夸克和胶子在小$x$下具有相同的高能行为。这种方法需要QCD输入参数化一个独立的DGMENS演化,我们数值计算并与MRST,GRV和DL模型进行了比较,Pomeron具有硬性质。它的演变给出了一个很好的拟合的实验数据。获得的值在$Q^{2}=20 \hspace{0.1cm}GeV^{2}$的范围$10^{-4}\hspace{0.1cm}{\leq}\hspace{0.1cm}x\hspace{0.1cm}{\leq}10^{-2}$内。

英文摘要:

We present a set of independent formulae to extract the gluon distribution and singlet structure function from its derivatives with respect to $lnQ^{2}$ in the next- to- leading order of perturbation theory at low-$x$ based on a hard pomeron exchange. In this approach, both singlet quarks and gluons have the same high-energy behavior at small $x$. This approach needs the QCD input parameterizations for a independent DGLAP evolutions that we calculated numerically and compared with MRST, GRV and DL model- the Pomeron has a hard nature. Its evolution gives a good fit to the experimental data. The obtained values are in the range $10^{-4}\hspace{0.1cm}{\leq}\hspace{0.1cm}x\hspace{0.1cm}{\leq}10^{-2}$ at $Q^{2}=20 \hspace{0.1cm}GeV^{2}$.

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