标题： 结构函数 显示英文标题

标题： Structure Functions

摘要： 我们总结了关于核子结构理解的最新进展。 描述了F2、R和F2c在较大Q2和x范围内的新数据。 常规的leading twist NLO微扰QCD对所有Q2大于一个GeV的新数据给出了很好的描述，几乎不留任何空间给更高扭度或更高对数。 我们总结了NLO拟合的现状，以及从结构函数数据中确定胶子分布和强耦合常数的情况。 最后，我们考虑了一些由新数据引发的理论问题。 显示英文摘要

摘要： We summarize recent developments in the understanding of nucleon structure. New data on F2, R and F2c, over a wide range of Q2 and x, are described. Conventional leading twist NLO perturbative QCD gives an excellent account of all the new data with Q2 above a GeV, leaving very little room for either higher twists or higher logarithms. We summarize the current status of NLO fits, and the determination of the gluon distribution and the strong coupling constant from structure function data. Finally we consider some of the theoretical issues raised by the new data.