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Q (2) evolution of parton distributions at small values of x: Effective scale for combined H1 and ZEUS data on the structure function F-2

机译:Q(2)小x值时parton分布的演化:结构函数F-2上H1和ZEUS组合数据的有效尺度

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摘要

An expression for the structure function F-2 in the form of Bessel functions at small values of the Bjorken variable x is used. This expression was derived for a flat initial condition in the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution equations. The argument of the strong coupling constant was chosen in such a way as to annihilate the singular part of the anomalous dimensions in the next-to-leading-order of perturbation theory. This choice, together with the frozen and analytic versions of the strong coupling constant, is used to analyze combined data of the H1 and ZEUS Collaborations obtained recently for the structure function F-2.
机译:使用贝塞尔函数x较小值的贝塞尔函数形式的结构函数F-2表达式。该表达式是针对Dokshitzer-Gribov-Lipatov-Altarelli-Parisi(DGLAP)演化方程中的平坦初始条件得出的。选择强耦合常数的论据的方式是消除扰动理论中次至领先顺序的异常维的奇异部分。该选择与强耦合常数的冻结版本和解析版本一起,用于分析最近针对结构函数F-2获得的H1和ZEUS合作的合并数据。

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