标题： 部分子分布函数确定中的问题 显示英文标题

标题： Issues in the Determination of Parton Distribution Functions

摘要： CTEQ和MRS部分子分布涉及大量（约30）参数，这些参数被拟合到大量（约900）数据中。 通常，这些组会产生与数据良好拟合的拟合结果，但没有进行实质性尝试来确定与拟合相关的误差。 确定误差将涉及考虑实验统计误差和系统误差，以及将测量截面与部分子分布相关联的理论公式的误差。 我们讨论此类误差分析所需的原则。 这些原则是标准的。 然而，在大量数据的情况下，这些原则的某些方面似乎不符合直觉。 因此，我们努力仔细关注方法背后的逻辑。 显示英文摘要

摘要： The CTEQ and MRS parton distributions involve a substantial number (~30) of parameters that are fit to a large number (~900) of data. Typically, these groups produce fits that represent a good fit to the data, but there is no substantial attempt to determine the errors associated with the fits. Determination of errors would involve consideration of the experimental statistical and systematic errors and also the errors in the theoretical formulas that relate the measured cross sections to parton distributions. We discuss the principles that would be needed in such an error analysis. These principles are standard. However, certain aspects of the principles appear counter-intuitive in the case of a large number of data. Accordingly, we strive to devote careful attention to the logic behind the methods.