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arXiv 2501.05092hep-phhep-latnucl-exnucl-th
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自旋为0强子的自旋-轨道关联与空间分布

Spin-orbit correlation and spatial distributions for spin-0 hadrons

Cédric Lorcé, Qin-Tao Song

AI总结:

本文通过动能-动量张量形状因子研究自旋为0强子的自旋-轨道关联,发现其与手征应力相关,并在忽略夸克质量时正比于电磁形状因子,进而基于π介子参数化给出了相关物理量的空间分布。

摘要:

自旋为0强子中的自旋-轨道关联可以通过动能-动量张量形状因子$\tilde F^q(t)$进行研究。我们观察到后者也与绕径向方向的力矩有关,我们将其解释为手征应力。如果忽略夸克质量的贡献,那么对于自旋为0强子,$\tilde F^q(t)$简单地正比于电磁形状因子,且自旋-轨道关联等于价夸克数的负一半。鉴于对自旋为0强子(如π介子、K介子和$α$粒子)的电磁形状因子已有广泛研究,我们基于当前π介子电磁形状因子的参数化,给出了手征应力与动能自旋-轨道关联的空间分布。

英文摘要:

The spin-orbit correlation in spin-0 hadrons can be investigated through the kinetic energy-momentum tensor form factor $\tilde F^q(t)$. We observe that the latter is also related to a torque about the radial direction, which we interpret as a chiral stress. If we neglect the quark mass contribution, then $\tilde F^q(t)$ is simply proportional to the electromagnetic form factor for spin-0 hadrons, and the spin-orbit correlation is equal to minus half of the valence quark number. Given the extensive studies on the electromagnetic form factor for spin-0 hadrons such as pions, kaons, and the $α$ particle, we present the spatial distributions of chiral stress and kinetic spin-orbit correlation based on current parametrizations of the pion electromagnetic form factor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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