On lowest-lying 1/2^(-) octet baryons

作     者：Chang Chen Wen-Qi Niu Han-Qing Zheng 陈畅;牛文奇;郑汉青

作者机构：Department of Physics and State Key Laboratory of Nuclear Physics and TechnologyPeking UniversityBeijing 100871China College of PhysicsSichuan UniversityChengdu 610065China Collaborative Innovation Center of Quantum MatterBeijing 100871China 

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

年 卷 期：2022年第46卷第8期

页      面：1-6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 in part by National Nature Science Foundations of China (11975028 10925522) 

主　　题：πN scatterings baryon resonance SU(3)octet 

摘      要：The recently proposed N^(*)(890)1/2^(-)baryon is studied in a flavor SU(3) scheme with K-matrix unitarization,by fitting to low-energy cross section and phase shift *** is found that N^(*)(890) co-exists with low-lying poles in other channels,which have been extensively discussed in the literature,though they belong to different octets in the SU(3) ***,the existence of N^(*)(890) is further verified.