Electromagnetic form factors of Λ_c in the space-like momentum region

作     者：Liang-Liang Liu Chao Wang Xin-Heng Guo 刘亮亮;王超;郭新恒

作者机构：College of Physics and Information EngineeringShanxi Normal UniversityLinfen 041004China Center for Ecological and Environmental SciencesKey Laboratory for Space Bioscience and BiotechnologyNorthwestern Polytechnical UniversityXi＇an710072China College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2018年第42卷第10期

页      面：44-50页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the Fundamental Research Funds for the Central Universities of China(31020170QD052) the Natural Science Basic Research Plan in Shaanxi Province of China(2018JQ1002) the National Natural Science Foundation of China(11775024,11575023) 

主　　题：Bethe-Salpeter equation Ac baryon electromagnetic form factors quark-diquark model 

摘      要：We studied the electromagnetic form factors （EMFFs） of Ac and the contributions of the quark and diquark currents to the EMFFs of Ac in the space-like region in the Bethe-Salpeter equation approach with instantaneous approximation. In this picture, baryon Ac can be regarded as a two-body c（ud） system. We found that for different values of parameters the contribution of quark and diquark currents to the EMFFs of Ac is very different, while their total contribution to the EMFFs of Ac is similar. The EMFFs of ∧c are similar to those of other baryons （proton,≡ , and ∑＋） with a peak at ω= 1, where ω=v＇.v is the velocity transfer between the initial state （with velocity v） and the final state （with velocity vr） of Ac.