论文标题
我们如何了解质子中的Gluon极化？
How well do we know the gluon polarization in the proton?
论文作者
论文摘要
我们对自旋平均和旋转依赖性的Parton分布功能（PDF）进行了第一个同时进行全局QCD分析，包括来自未偏振和偏振黑体碰撞的单射流生产数据。我们批判性地评估了SU（3）风味对称性和PDF阳性假设对Quark和Gluon螺旋性PDF的影响，并从中找到强烈的偏见，尤其是在Gluon极化上。同时的分析允许首次提取单个螺旋性对准和抗抗血清的PDF，并始终如一地处理不确定性。
We perform the first simultaneous global QCD analysis of spin-averaged and spin-dependent parton distribution functions (PDFs), including single jet production data from unpolarized and polarized hadron collisions. We critically assess the impact of SU(3) flavor symmetry and PDF positivity assumptions on the quark and gluon helicity PDFs, and find strong bias from these, particularly on the gluon polarization. The simultaneous analysis allows for the first time extraction of individual helicity-aligned and antialigned PDFs with a consistent treatment of uncertainties.
