标题： 迈向π介子的三维部分子结构：将横向动量数据纳入全局QCD分析 显示英文标题

标题： Towards the three-dimensional parton structure of the pion: Integrating transverse momentum data into global QCD analysis

摘要： 我们开展了一项新的蒙特卡洛QCD分析，研究了π介子的parton分布函数，并首次包含了横向动量相关的π核Drell-Yan截面，以及来自HERA的$p_{\rm T}$-积分Drell-Yan和领先中子电生产数据。我们评估了蒙特卡洛拟合对动力学切割、因子化尺度及参数选择的敏感性，并讨论了各种数据集对π介子的夸克和胶子分布的影响。本研究为同时分析collinear和横向动量相关的π介子分布，以及确定π介子的三维结构提供了必要的步骤。 显示英文摘要

摘要： We perform a new Monte Carlo QCD analysis of pion parton distribution functions, including, for the first time, transverse momentum dependent pion-nucleus Drell-Yan cross sections together with $p_{\rm T}$-integrated Drell-Yan and leading neutron electroproduction data from HERA. We assess the sensitivity of the Monte Carlo fits to kinematic cuts, factorization scale, and parametrization choice, and we discuss the impact of the various datasets on the pion's quark and gluon distributions. This study provides the necessary step towards the simultaneous analysis of collinear and transverse momentum dependent pion distributions and the determination of the pion's three-dimensional structure.