论文标题
从DRELL-YAN数据中提取斜横向动量分布
Extraction of Pion Transverse Momentum Distributions from Drell-Yan data
论文作者
论文摘要
我们绘制非极化触发中的非极化夸克作为夸克横向动量的函数的分布，该函数用非极化的横向动量分布（TMDS）编码。我们从不偏振的Pion-Nucleus drell-Yan过程的可用数据中提取PION TMD，其中横截面在Lepton Pair横向动量中是不同的。在横截面中，PION TMD与我们先前的研究一致始终获得的核子TMD卷曲。我们与数据获得了相当良好的协议。我们还提出了通过指南针协作来衡量的Pion-Nucleus散射的预测。
We map the distribution of unpolarized quarks inside a unpolarized pion as a function of the quark's transverse momentum, encoded in unpolarized Transverse Momentum Distributions (TMDs). We extract the pion TMDs from available data of unpolarized pion-nucleus Drell-Yan processes, where the cross section is differential in the lepton-pair transverse momentum. In the cross section, pion TMDs are convoluted with nucleon TMDs that we consistently take from our previous studies. We obtain a fairly good agreement with data. We present also predictions for pion-nucleus scattering that is being measured by the COMPASS Collaboration.
