EPPS21: a global QCD analysis of nuclear PDFs
EPPS21: a global QCD analysis of nuclear PDFs
复制标题
EPPS21：核 PDF 的全局 QCD 分析
DOI：
--
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
C. Salgado
中科院分区：
文献类型：
--
作者：
K. Eskola;Petja Paakkinen;H. Paukkunen;C. Salgado
给出了微扰QCD中次前级共线分解核部分子分布函数(PDF)的最新整体分析。与我们以前的拟合EPPS16相比，目前的分析包括更多来自大型强子对撞机上的质子-铅碰撞的数据：5TeV双差分CMS dijet和LHCb D介子数据，以及8TeV CMS W±Documentclass[12pt]{Minimum}usepackage{usepackage}usepackage{amsfonts}usepackage{amssymb}usepackage{amsbsy}usepackage{matrssfs}usepackage{oddsidemargin}{-69pt}egage{Document}$^PM$End{Document}数据中的数据。这些新数据导致了在动量分数x的小值和中值时明显更好地约束胶子分布，证实了大原子核中胶子的阴影和反阴影的存在。此外，我们还包括杰斐逊实验室测量的深度非弹性散射，它探测大x和低虚度下的核PDF。现在，我们还首次在黑森框架内探讨了由于基线质子PDF的误差而导致的核PDF的不确定性。我们发布了我们的分析结果，作为一种名为EPPS21的新的核PDF的公开参数。
We present an updated global analysis of collinearly factorized nuclear parton distribution functions (PDFs) at next-to-leading order in perturbative QCD. In comparison to our previous fit, EPPS16, the present analysis includes more data from proton-lead collisions at the Large Hadron Collider: 5 TeV double-differential CMS dijet and LHCb D-meson data, as well as 8 TeV CMS W±documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} egin{document}$$^pm $$end{document} data. These new data lead to significantly better-constrained gluon distributions at small and intermediate values of the momentum fraction x, confirming the presence of shadowing and antishadowing for gluons in large nuclei. In addition, we include Jefferson Lab measurements of deeply inelastic scattering which probe nuclear PDFs at large x and low virtualities. For the first time within the Hessian framework, we now also explore the uncertainties of nuclear PDFs due to the errors in the baseline proton PDFs. We release the results of our analysis as a new public parametrization of nuclear PDFs called EPPS21.
影响因子：
64.8
作者：
B. M. A. O. S. E. M. L. B. S. M. A. H. J. I. L. M. M. Schmookler Duer Schmidt Hen Gilad Piasetzky Strikm-B.-M.-A.-O.-S.-E.-M.-L.-B.-S.-M.-A.-H.-J.-I.-L.-M.-2080539512;B. Schmookler;M. Duer;A. Schmidt
通讯作者：
B. M. A. O. S. E. M. L. B. S. M. A. H. J. I. L. M. M. Schmookler Duer Schmidt Hen Gilad Piasetzky Strikm-B.-M.-A.-O.-S.-E.-M.-L.-B.-S.-M.-A.-H.-J.-I.-L.-M.-2080539512;B. Schmookler;M. Duer;A. Schmidt