论文标题
统计模型中的乳parton分布的新提取
A New Extraction of Pion Parton Distributions in the Statistical Model
论文作者
论文摘要
我们提出了一项新的分析，以在统计模型的框架中提取Pion的Parton分布功能（PDF）。从最初为Spin-1/2核子开发的统计模型框架开始，我们考虑了适当的修改，并考虑了PION的自旋0性质以及Isospin和电荷偶联对称性。与提取PION的PDF相比，这导致参数数量大大减少。使用$π^ - $ - 诱导的drell-yan数据来确定这种统计模型方法的参数，我们表明可以获得对这些实验数据的良好描述，并可以获得近代领先顺序的QCD计算。计算与$π^+/π^ - $ drell-yan横截面比率数据（未包含在全球拟合中）的良好一致性已经确认了这些新的Pion PDF的预测能力。
We present a new analysis to extract pion's parton distribution functions (PDFs) in the framework of the statistical model. Starting from the statistical model framework first developed for the spin-1/2 nucleon, we apply appropriate modifications taking into account the spin-0 nature of pion and the isospin and charge-conjugation symmetry properties. This results in a significant reduction of the number of parameters compared to a recent work to extract pion's PDFs. Using $π^-$-induced Drell-Yan data to determine the parameters of this statistical model approach, we show that a good description of these experimental data with Next-to-Leading order QCD calculations can be obtained. Good agreement between the calculations and the $π^+/π^-$ Drell-Yan cross section ratio data, not included in the global fit, has confirmed the predictive power of these new pion PDFs.
