论文标题
旋转1粒子的机械结构
Mechanical structure of a spin-1 particle
论文作者
论文摘要
我们研究了自旋-1粒子的机械结构。引入三个不同的框架，即三维（3D）BREIT框架，二维（2D）BREIT框架和2D无限动量框架（等效地是二维的DRELL-YAN框架），我们仔细检查了2D和3D Energy-Momentum Tensor（Emt）（EMT）中的分布。我们首先通过执行ABEL转换来得出2D BREIT框架的EMT分布。 2D BREIT框架中的质量分布包含几何诱导的额外的单极贡献。 2D BREIT框架中的压力分布还具有诱导的单极结构。当执行Lorentz的提升时，2D Infinite Momentum框架中的质量分布会获取诱导的偶极子项。同样，我们还对压力和剪切力密度的偶极子贡献。当沿$ x $ - 和$ z $轴两极化时，我们会可视化2D质量分布。我们观察到，当沿$ x $轴极化时，无限动量框架中的2D质量分布清楚地表现出诱导的偶极结构。我们还讨论了极化自旋1粒子内部的强力场。
We investigate the mechanical structure of a spin-1 particle. Introducing three different frameworks, i.e., the three-dimensional (3D) Breit frame, the two-dimensional (2D) Breit frame, and the 2D infinite momentum frame (equivalently the two-dimensional Drell-Yan frame), we scrutinize the 2D and 3D energy-momentum tensor (EMT) distributions in these frames. We first derive the EMT distributions in the 2D Breit frame by performing the Abel transformation. The mass distribution in the 2D Breit frame contains an additional monopole contribution induced geometrically. The pressure distribution in the 2D Breit frame also gets an induced monopole structure. When the Lorentz boost is carried out, the mass distribution in the 2D infinite-momentum frame acquires the induced dipole term. Similarly, we also have the induced dipole contributions to the pressure and shear-force densities. We visualize the 2D mass distributions when the spin-1 particle is polarized along the $x$- and $z$-axes. We observe that the 2D mass distribution in the infinite momentum frame exhibit clearly the induced dipole structure when the spin-1 particle is polarized along the $x$-axis. We also discuss the strong force fields inside a polarized spin-1 particle.
