标题： 首次在{\tt xFitter}框架下对衍射部分子分布函数及其不确定性的全局下一阶确定 显示英文标题

标题： First global next-to-leading order determination of diffractive parton distribution functions and their uncertainties within the {\tt xFitter} framework

摘要： 我们提出{\tt GKG18-DPDFs}，这是对非领头阶（NLO）QCD中衍射部分子分布函数（衍射PDFs）及其不确定性的分析。 这是在{\tt xFitter}框架内确定的第一个全局衍射PDF集合。 该分析是基于所有可用且最新版的包括衍射深度非弹性散射（衍射DIS）数据。 在 Thorne-Roberts（TR）通用质量变量味数方案（GM-VFNS）框架内考虑了重夸克贡献。 由于包含了H1/ZEUS联合包括衍射截面测量的高精度数据，我们形成了一组相互一致的衍射PDF。 我们通过使用减少的数据集生成多种确定结果，研究了H1/ZEUS联合数据的影响。 我们发现这些数据集对衍射PDF有显著影响，某些情况下不确定度有明显降低。 基于提取的衍射PDF的预测结果与分析的衍射DIS数据以及其他衍射PDF的确定结果进行了比较。 显示英文摘要

摘要： We present {\tt GKG18-DPDFs}, a next-to-leading order (NLO) QCD analysis of diffractive parton distribution functions (diffractive PDFs) and their uncertainties. This is the first global set of diffractive PDFs determined within the {\tt xFitter} framework. This analysis is motivated by all available and most up-to-date data on inclusive diffractive deep inelastic scattering (diffractive DIS). Heavy quark contributions are considered within the framework of the Thorne-Roberts (TR) general mass variable flavor number scheme (GM-VFNS). We form a mutually consistent set of diffractive PDFs due to the inclusion of high-precision data from H1/ZEUS combined inclusive diffractive cross sections measurements. We study the impact of the H1/ZEUS combined data by producing a variety of determinations based on reduced data sets. We find that these data sets have a significant impact on the diffractive PDFs with some substantial reductions in uncertainties. The predictions based on the extracted diffractive PDFs are compared to the analyzed diffractive DIS data and with other determinations of the diffractive PDFs.