; Ke, Hong-Wei
; Li, Xue-Qian] Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China
; [Ding, Yi-Bing] Chinese Acad Sci, Grad Sch, Dept Phys, Beijing 100049, Peoples R China
; [Guo, Xin-Heng] Beijing Normal Univ, Inst Low Energy Nucl Phys, Beijing 100875, Peoples R China
; [Jin, Hong-Ying] Zhejiang Univ, Inst Modern Phys, Hangzhou 310027, Peoples R China
; [Shen, Peng-Nian] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
; [Wan, Guo-Li] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China
The diquark structure in baryons is commonly accepted as a reasonable approximation which can much simplify the picture of baryons and reduce the length of calculations. However, a diquark by no means is a point-like particle, even though it is treated as a whole object. Therefore, to apply the diquark picture to phenomenological calculations, at the effective vertices for the diquark-gauge-boson interactions, suitable form factors must be introduced to compensate the effects caused by the inner structure of the diquark. It is crucial to derive the appropriate form factors for various interactions. In this work, we use the Bethe-Salpeter equation to derive such form factors and numerically evaluate their magnitudes. Our results not only qualitatively, but also quantitatively confirm the form factors phenomenologically introduced in literature.