论文标题
纵向旋转转移到clas12中的$λ$ hyperons
Longitudinal Spin Transfer to $Λ$ Hyperons in CLAS12
论文作者
论文摘要
使用$λ$的自分析衰减，可以确定可以确定纵向自旋传输$ d_ {ll'} $从偏振电子束从偏光的电子束散射从脱糖质子靶的散射。对于在当前碎片区域中产生的$λ$ S，此数量与依赖性的碎片函数$ g_1^λ$成正比，并且可以洞悉$λ$的旋转结构。当前，$ d_ {ll'} $上的有限实验数据无法区分$λ$旋转结构的不同模型。该贡献报告了使用杰斐逊实验室（Jefferson Lab）的CLAS12光谱仪以10.6 GEV极化电子束在纵向自旋转移进行的持续分析的状态。我们还报告了图形神经网络（GNN）的新颖使用以识别信号事件。
Using the self-analyzing decay of the $Λ$, the longitudinal spin transfer $D_{LL'}$ to the hyperon from a polarized electron beam scattering off an unpolarized proton target can be determined. For $Λ$s produced in the current fragmentation region, this quantity is proportional to the helicity dependent fragmentation function $G_1^Λ$ and can provide insight into the spin structure of the $Λ$. Currently, limited experimental data on $D_{LL'}$ cannot discriminate between different models of $Λ$ spin structure. This contribution reports on the status of the ongoing analysis of the longitudinal spin transfer using data taken by the CLAS12 spectrometer at Jefferson Lab with a 10.6 GeV polarized electron beam. We also report on the novel use of Graph Neural Networks (GNNs) to identify signal events.
