Form factors of Ω - in a covariant quark-diquark approach

被引：3

作者：

Fu, Dongyan ^{[1
,2
]}

Wang, Jiaqi ^{[1
,2
]}

Dong, Yubing ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 101408, Peoples R China

来源：

PHYSICAL REVIEW D | 2023年 / 108卷 / 07期

基金：

中国国家自然科学基金;

关键词：

BARYON MAGNETIC-MOMENTS; ELECTROMAGNETIC STRUCTURE; QUADRUPOLE-MOMENTS; DECUPLET; NUCLEON; HYPERONS; MODEL;

D O I：

10.1103/PhysRevD.108.076023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The electromagnetic and gravitational form factors of CI-, a spin-3/2 hyperon composed of three s quarks, are calculated by using a covariant quark-diquark approach. The model parameters are determined by fitting to the form factors of the lattice QCD calculations. Our obtained electromagnetic radii, magnetic moment, and electric-quadrupole moment are in agreement with the experimental measurements and some other model calculations. Furthermore, the mass and spin distributions of CI- from the gravitational form factors are also displayed. It is found that the mass radius is smaller than its electromagnetic ones. Finally, the interpretations of the energy density and momentum current distribution are also discussed.

引用

页数：13

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