旁观者模型中核子的Twist-3胶子广义部分子分布
Twist-3 gluon GPDs for the nucleon in a spectator model
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中文总结 AI 辅助
本文在旁观者模型中计算了核子的Twist-3胶子广义部分子分布及前向极限下的粒子分布函数，提供了可用于未来现象学研究的模型预测。
中文摘要 AI 辅助
我们在一个旁观者模型中研究了非零斜度下核子的完整Twist-3胶子广义部分子分布（GPDs）集合，该模型将核子视为由主动自旋-1胶子和自旋-1/2旁观者粒子组成的两体系统。旁观者质量允许连续变化，并通过谱函数描述，而核子-胶子-旁观子耦合则由包含两个形状因子的有效顶点建模。我们在广泛的运动学范围内计算了Twist-3胶子GPDs，并研究了相应的依赖于碰撞参数的粒子分布，这些分布定义为零斜度下GPDs的二维傅里叶变换。在前向极限下，我们进一步获得了相应的Twist-3粒子分布函数（PDFs）。我们的结果为Twist-3胶子GPDs和PDFs提供了模型预测，这些预测可用于未来的现象学研究以及当前和未来对撞机设施中可观测量的研究。
英文摘要
We investigate the complete set of twist-3 gluon generalized parton distributions (GPDs) of the nucleon at nonzero skewness within a spectator model, in which the nucleon is treated as a two-body system consisting of an active spin-1 gluon and a spin-1/2 spectator particle. The spectator mass is allowed to vary continuously and is described by a spectral function, while the nucleon-gluon-spectator coupling is modeled by an effective vertex containing two form factors. We calculate the twist-3 gluon GPDs over a broad kinematic range and investigate the corresponding impact-parameter-dependent parton distributions, defined as two-dimensional Fourier transforms of the GPDs at zero skewness. In the forward limit, we further obtain the corresponding twist-3 parton distribution functions (PDFs). Our results provide model predictions for twist-3 gluon GPDs and PDFs that can be useful for future phenomenological studies and for investigating observables at current and future collider facilities.
发表机构
- School of Physics, Southeast University（东南大学物理学院）
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