σ exchange in the one-boson exchange model involving the ground state octet baryons

被引：4
|
作者：
Wu, Bing [1 ,2 ]
Cao, Xiong-Hui [1 ]
Dong, Xiang-Kun [3 ]
Guo, Feng-Kun [1 ,2 ,4 ,5 ]
机构：
[1] Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
[3] Univ Bonn, Helmholtz Inst Strahlen und Kernphys, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany
[4] Beihang Univ, Peng Huanwu Collaborat Ctr Res & Educ, Beijing 100191, Peoples R China
[5] Chinese Acad Sci, Inst Modern Phys, Southern Ctr Nucl Sci Theory, Huizhou 516000, Peoples R China
来源：
PHYSICAL REVIEW D | 2024年 / 109卷 / 03期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
DISPERSIVE ANALYSIS; NUCLEON SCATTERING; CHIRAL EXPANSION; VECTOR CURRENT; MASSES; DECAY; ETA; PI;
D O I：
10.1103/PhysRevD.109.034026
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Based on the one -boson -exchange framework that the sigma meson serves as an effective parametrization for the correlated scalar-isoscalar xx interaction, we calculate the coupling constants of the sigma to the 1 + ground 2 state light baryon octet B by matching the amplitude of B former is calculated using a dispersion relation, supplemented with chiral perturbation theory results for the BBxx couplings and the Muskhelishvili-Omne`s representation for the xx rescattering. Explicitly, the coupling constants are obtained as gNN sigma = 8.7+1.7-1.9, g sigma sigma sigma = 3.5+1.8-1.3, g Xi Xi sigma= 2.5+1.5-1.4, and g Lambda Lambda sigma = 6.8+1.5 -1.7. These coupling constants can be used in the one -boson -exchange model calculations of the interaction of light baryons with other hadrons. B over bar -> xx -> B over bar B to that of B B over bar -> sigma -> B over bar B. The
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页数：16
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