论文标题
核子电磁和轴向形式因子中的尺寸和轴向形式因子模型
Nucleon Electromagnetic and Axial Form Factors in a Light-front Constituent Quark Model
论文作者
论文摘要
在目前的工作中，我们研究了组成夸克的标量自旋偶联对核子电子特性的影响，它通过引入具有两个动量尺度的价值光范围波函数。通过比较使用一个量表和两个比例波函数模型获得的结果，我们发现最后一个显示了对静态可观察物的合理描述，以及$μ_pg_{ep}/g_ {mp} $比率，其中零位置出现在10〜 [gev/c/c] $^2 $或更高的平方动量转换范围内。我们还显示了轴向矢量耦合$ g_ {a} $和核子轴向矢量形式的结果。当核素波函数模型的参数以使中子磁矩的实验值被描述时，获得了$ g_a $的最佳结果。
In the present work we study the effect of the scalar spin coupling of constituent quarks on the nucleon electroweak properties by introducing a valence light-front wave function with two momentum scales. By comparing the results obtained with the one scale and two scale wave function models, we have found that the last one has shown a reasonable description of the static observables and $μ_pG_{Ep}/G_{Mp}$ ratio in which the position of the zero appears around 10~[GeV/c]$^2$ or for higher squared momentum transfers. We have also shown results for the axial-vector coupling $g_{A}$ and the nucleon axial-vector form factor. The best result for $g_A$ was obtained when the parameters of the nucleon wave function model were such that the experimental value of the neutron magnetic moment was described.
