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arXiv 2202.08635hep-phhep-thnucl-th
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非零偏度和Wigner分布下的超前扭转GTMD

Leading twist GTMDs at nonzero skewness and Wigner distributions in boost-invariant longitudinal position space

Tanmay Maji, Chandan Mondal, Daekyoung Kang

摘要:

在软壁AdS/QCD激发的核子的光前夸克-双夸克模型中,研究了非零偏斜度下的首扭夸克广义横动量分布。助推不变纵坐标$σ=\frac{1}{2} b^- P^+$被确定为偏度的傅立叶共轭。可以采用GTMD相对于偏斜度变量$ξ$的傅立叶变换来提供助推不变纵向位置空间$σ$中的维格纳分布,$σ$是与波前时间共轭的坐标,$τ=t+z/c$。纵向位置空间中的维格纳分布呈现出衍射图案,这类似于光学中波的衍射散射。

英文摘要:

We investigate the leading twist quark generalized transverse momentum distributions (GTMDs) at nonzero skewness in a light-front quark-diquark model for the nucleon motivated by soft-wall AdS/QCD. The boost-invariant longitudinal coordinate, $σ=\frac{1}{2} b^- P^+$, is identified as the Fourier conjugate of the skewness. The Fourier transform of the GTMDs with respect to the skewness variable $ξ$ can be employed to provide the Wigner distributions in the boost-invariant longitudinal position space $σ$, the coordinate conjugate to light-front time, $τ=t+z/c$. The Wigner distributions in the longitudinal position space exhibit diffraction patterns, which are analogous to the diffractive scattering of a wave in optics.

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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