论文标题
观众模型中的横向摩托明依赖性gluon分布函数
Transverse-momentum-dependent gluon distribution functions in a spectator model
论文作者
论文摘要
我们介绍了核子中胶子的横向摩肌依赖性分布（TMD）的模型计算。该模型基于以下假设：核子可以发出gluon，并且在发射后仍将其视为单个观众粒子。该观众粒子被认为是壳的，但允许其质量取得连续的值范围，该值用光谱函数描述。有效的顶点包含两个形式，描述了核子 - 螺旋子谱耦合。我们修复了模型参数，以获得与从全局拟合提取的共线gluon分布的最佳协议。我们研究了核子内部振动弹的动量空间，以进行各种极化组合。这些可用于对当前和未来对撞机设施的GLUON TMD研究相关的可观察物进行预测。
We present a model calculation of transverse-momentum-dependent distributions (TMDs) of gluons in the nucleon. The model is based on the assumption that a nucleon can emit a gluon, and what remains after the emission is treated as a single spectator particle. This spectator particle is considered to be on-shell, but its mass is allowed to take a continuous range of values, described by a spectral function. The nucleon-gluon-spectator coupling is described by an effective vertex containing two form factors. We fix the model parameters to obtain the best agreement with collinear gluon distributions extracted from global fits. We study the tomography in momentum space of gluons inside nucleons for various combinations of their polarizations. These can be used to make predictions of observables relevant for gluon TMD studies at current and future collider facilities.
