论文标题
与PDF的CT18参数化连接和断开的海分顿
Connected and Disconnected Sea Partons from CT18 Parametrization of PDFs
论文作者
论文摘要
在CT18全局分析中，在非扰动parton分布函数的替代参数化中可容纳连接和断开的海片的分离，这些分离是在Hadronic张量的欧几里得路径综合公式中发现的。这是借助这两个海洋区的独特小$ x $行为，以及奇怪的动量分数与$ \ bar u $或$ \ bar d $的晶格计算的约束。 CT18的整个数据集用于此CT18CS拟合中。还讨论了最近的SeaQuest数据对$ \ bar {d}（x） - \ bar {u}（x）$ CT18CS的分布的影响。 $ u $和$ d $的价值，连接的海洋和断开的海洋，奇怪的和gluon partons的单独动量分数首次以$μ= 1.3 $ GEV呈现。可以将它们与系统误差控制的晶格计算进行比较。
The separation of the connected and disconnected sea partons, which were uncovered in the Euclidean path-integral formulation of the hadronic tensor, is accommodated with an alternative parametrization of the non-perturbative parton distribution functions in the CT18 global analysis. This is achieved with the help of the distinct small $x$ behaviours of these two sea partons and the constraint from the lattice calculation of the ratio of the strange momentum fraction to that of the $\bar u$ or $\bar d$ in the disconnected insertion. The whole dataset of CT18 is used in this CT18CS fit. The impact of the recent SeaQuest data on the $\bar{d}(x)-\bar{u}(x)$ distribution of CT18CS is also discussed. The separate momentum fractions for the valence, the connected sea and disconnected sea of $u$ and $d$, the strange and the gluon partons are presented at $μ=1.3$ GeV for the first time. They can be compared term-by-term with systematic error controlled lattice calculations.
