标题： 纵向结构函数从部分子参数化 显示英文标题

标题： Longitudinal structure function from the parton parameterization

摘要： 我们提出一组公式，用于从质子结构函数及其关于lnQ2的导数中提取纵向结构函数，在低x下基于硬波色子交换的微扰理论的下一阶近似。 DIS截面比值R(x;Q2)和比值FL(x;Q2)=F2(x;Q2)的行为被研究并与实验数据进行比较，这些行为由颜色偶极子模型边界控制。 这些结果在低x值范围内与DIS实验数据有很好的一致性。 这些结果在非常低x下的下一阶近似中可用于LHeC区域，以分析超高能过程。 显示英文摘要

摘要： We present a set of formulas to extract the longitudinal structure function from the proton structure function and its derivatives with respect to lnQ2 in the next-to-next-to-leading order of the perturbative theory at low x based on a hard poemron exchange. The behavior of the DIS cross section ratio R(x;Q2) and the ratio FL(x;Q2)=F2(x;Q2) studied and compared with the experimental data, also these behaviors controlled by the color dipole model bound. These results show a good agreement with the DIS experimental data throughout the low values of x. These results within the next-to-next-to-leading order approximation at very low x can be applied in the LHeC region for analyses of ultra-high energy processes.