带电π介子非极化TMDPDF的Drell-Yan测量确定
Determination of charged pion unpolarised TMDPDFs from Drell-Yan measurements
- Institute of Physics, Academia Sinica（中央研究院物理研究所）
- Department of Physics, Chung-Yuan Christian University（中原大学物理系）
- Centre for High Energy Physics, Chung-Yuan Christian University（中原大学高能物理中心）
- Institute of Physics, National Yang Ming Chiao Tung University（国立阳明交通大学物理研究所）
- Physics Division, National Centre for Theoretical Sciences（国家理论科学中心物理组）
机构由 AI 辅助整理，请以论文原文为准。
中文总结 AI 辅助
本文从Drell-Yan实验数据提取π介子价夸克非极化TMDPDF，采用TMD因子化框架和含三参数的指数衰减ansatz，结果与现象学和格点计算定性一致。
中文摘要 AI 辅助
我们展示了从Drell-Yan过程的实验测量中提取π介子内价夸克非极化横动量依赖（TMD）部分子分布函数（PDF）的结果。本项目采用的方法依赖于TMD因子化框架，并输入核子TMDPDF、π介子共线PDF以及Collins-Soper核。TMDPDF的非微扰行为通过一个包含三个未知参数并实现大横向距离处指数衰减的ansatz函数进行参数化。本工作采用了微扰论的最新结果，并利用了核子TMDPDF的精确估计。我们对拟合中使用的数据进行了研究。这项研究得出了关于实验数据中运动学和分箱方法效应的重要观察。我们的结果与先前从现象学和格点计算得到的确定在定性上一致。
英文摘要
We present an extraction of the unpolarised transverse momentum dependent (TMD) parton distribution functions (PDFs) for the valence quarks in the pion from experimental mea- surements of the Drell-Yan process. The procedure adopted in this project relies on the framework of TMD factorisation, and the inputs of nucleon TMDPDF, pion collinear PDF, as well as the Collins-Soper kernel. The non-perturbative behaviour of the TMDPDFs is parameterised using an ansatz function that contains three unknown parameters and implements an exponential decay at large transverse distances. This work employs the most recent results in perturbation theory, and utilises a precise estimation of the nucleon TMDPDF. We perform an investigation of data used in the fit. This investigation leads to important observations regarding the effects of the kinematics and binning methods in the experimental data. Our results agree qualitatively with the previous determinations from phenomenology and a lattice computation
