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arXiv 2401.15596hep-ph
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光锥夸克模型中海夸克的Wigner分布

Wigner distributions of sea quarks in the light-cone quark model

Xiaoyan Luan, Zhun Lu

AI总结:

该研究在光锥形式下用重叠表示,基于重子-介子涨落模型的光锥波函数,计算质子中$\bar{u}$、$\bar{d}$海夸克的GTMDs与Wigner分布,给出多空间数值结果并研究其轨道角动量及自旋-轨道关联。

摘要:

我们在光锥形式体系内采用重叠表示,研究了质子中$\bar{u}$和$\bar{d}$夸克的Wigner分布。利用重子-介子涨落模型基于$|q\bar{q}B\rangle$福克(Fock)态得到的光锥波函数,我们计算了非极化/纵向极化质子中非极化/纵向极化海夸克的Wigner分布。Wigner分布可通过对广义横动量依赖部分子分布(GTMDs,generalized transverse-momentum dependent parton distributions)进行傅里叶变换得到,我们在中间步骤还计算了$\bar{u}$和$\bar{d}$夸克的GTMDs。本文给出了$\bar{u}$和$\bar{d}$夸克的Wigner分布在横动量空间、冲击参数空间及混合平面中的数值结果,同时研究了海夸克的轨道角动量与自旋-轨道关联。

英文摘要:

We investigate the Wigner distributions of $\bar{u}$ and $\bar{d}$ quarks in a proton using the overlap representation within the light cone formalism. Using the light cone wave functions which are obtained from the baryon-meson fluctuation model in terms of the $|q\bar{q}B\rangle$ Fock states, we calculate the Wigner distributions for the unpolarized/longitudinally polarized sea quark in an unpolarized/longitudinally polarized proton. The Wigner distributions can be obtained through a Fourier transform on the generalized transverse-momentum dependent parton distributions (GTMDs). We also calculate the GTMDs of $\bar{u}$ and $\bar{d}$ quarks in the intermediate step. Numerical results for the Wigner distributions of $\bar{u}$ and $\bar{d}$ quarks in transverse momentum space, impact parameter space and the mixed plane are presented. We also study the orbital angular momentum and the spin-orbit correlations of the sea quarks.

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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