论文标题

nambu中的乳头的广义准时,ioffe时间和伪夸克分布

Generalized quasi, Ioffe-time, and pseudo quark distributions of the pion in the Nambu--Jona-Lasinio model

论文作者

Shastry, Vanamali, Broniowski, Wojciech, Arriola, Enrique Ruiz

论文摘要

我们在夸克模型尺度上分析了茶(茶)中价夸克的广义准时,ioffe时间和伪分布。我们使用NAMBU-JONA-LASINIO模型的框架,并研究了Pion必须采取多快以有效达到无限动量极限的基本问题,该方法可以提供有关广义Parton分布功能的信息。我们考虑与自旋密度相关的向量分布和横向分布。通过开发的分析表达式,我们得出的结论是,要有效地接近无限动量限制,一个粗略地需要$ \ sim 3 $ gev的顺序。我们还探索了准分布的多项式性,并研究了广义的准形式。借助广义的Ioffe时间分布,研究了模型中横向和纵向动力学的可分离性问题,除非动量转移$ t $很大,否则结论是断裂并不是很大的。我们还提供了以合理精度获得广义的Parton分布所需的IOFFE时间值范围的估计。我们的模型结果是分析性或半分析,为理论形式主义提供了宝贵的见解,并说明了研究分布的复杂特征。

We analyze the generalized quasi, Ioffe-time, and pseudo distributions of the valence quarks in the pion at the quark model scale. We use the framework of the Nambu-Jona-Lasinio model and investigate the basic question of how fast the pion has to move to effectively reach the infinite momentum limit, where the approach can provide the information on the generalized parton distribution functions. We consider both the vector distributions and the transversity distributions, related to the spin densities. With the developed analytic expressions, we conclude that to effectively approach the infinite momentum limit, one roughly needs the pion momenta of the order of $\sim 3$GeV. We also explore polynomiality of the quasi distributions and study the generalized quasi form factors. The issue of separability of the transverse and longitudinal dynamics in the model is studied with the help of the generalized Ioffe-time distributions, with the conclusion that the breaking is not substantial, unless the momentum transfer $t$ is large. We also provide an estimate of the range of the Ioffe-time values needed to obtain the generalized parton distributions with a reasonable accuracy. Our model results, which are analytic or semi-analytic, provide a valuable insight into the theoretical formalism and illustrate the intricate features of the investigated distributions.

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