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arXiv 1402.0768hep-ph
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计算低$x$时胶子分布指数- $λ_{g}$和结构函数- $λ_{S}$的近似方法

The approximation method for calculation of the exponent of the gluon distribution-$λ_{g}$ and the structure function-$λ_{S}$ at low $x$

G. R. Boroun, B. Rezaei

摘要:

本文提出了一组利用QCD Dokshitzer-Gribov-Lipatov-Altarelli-parisi(DGCD)演化方程的解从低$x$的类Regge行为中提取指数$λ_g$胶子分布和$λ_S$结构函数的公式.与H1协作网的大多数数据相比,该指数与$x$无关,随ln $Q^{2}$线性增加。我们还计算了低$x$下的结构函数$F_{2}(x,Q^{2})$和胶子分布$G(x,Q^{2})$,并与H $1$数据的NLO QCD拟合、双Pomeron拟合、多极Pomeron交换拟合和MRST进行了比较(A.D.Martin,R.G.Roberts,W. J. Stirling和R.S.Thorne),DL(A.Donnachie和P. V. Landshoff),NLO-GRV(M.Gluk,E.Reya和A.Vogt)分别拟合结果。

英文摘要:

We present a set of formulae using the solution of the QCD Dokshitzer-Gribov-Lipatov-Altarelli-parisi (DGLAP) evolution equation to the extract of the exponent $λ_g$ gluon distribution and $λ_S$ structure function from the Regge- like behavior at low $x$. The exponents are found to be independent of $x$ and to increase linearly with ln$Q^{2}$ and compared with the most data from H1 Collaboration. We also calculated the structure function $F_{2}(x,Q^{2})$ and the gluon distribution $G(x,Q^{2})$ at low $x$ assuming the Regge- like behavior of the gluon distribution function at this limit and compared with NLO QCD fit to the H$1$ data, two Pomeron fit, multipole Pomeron exchange fit and MRST (A.D.Martin, R.G.Roberts, W.J.Stirling and R.S.Thorne), DL(A.Donnachie and P.V.Landshoff), NLO-GRV(M.Gluk, E.Reya and A.Vogt) fit results, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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