论文摘要
In this paper we propose a dispersive method to describe two-body scattering with unitarity imposed. This approach is applied to elastic ππ scattering. The amplitudes keep single-channel unitarity and describe the experimental data well, and the low-energy amplitudes are consistent with that of chiral perturbation theory. The pole locations of the σ, f0（980）, ρ（770） and f2（1270） and their couplings to ππ are obtained. A virtual state appearing in the isospin-two S-wave is confirmed. The correlations between the left（and right） hand cut and the poles are discussed. Our results show that the poles are more sensitive to the right hand cut rather than the left hand cut. The proposed method could be used to study other two-body scattering processes.
论文目录
文章来源
类型: 期刊论文
作者: 戴凌云,康现伟,罗涛,Ulf-G.Mei?ner
来源: Communications in Theoretical Physics 2019年11期
年度: 2019
分类: 基础科学,工程科技Ⅱ辑
专业: 物理学,核科学技术
单位: School of Physics and Electronics, Hunan University,College of Nuclear Science and Technology, Beijing Normal University,Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) and Institute of Modern Physics, Fudan University,Helmholtz Institut für Strahlen-und Kernphysik and Bethe Center for Theoretical Physics,Universit?t Bonn,Institute for Advanced Simulation, Institut f¨ur Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich
基金: Supported by National Natural Science Foundation of China uder Grant Nos.11805059,11805012,11805037,Fundamental Research Funds for the Central Universities,the Joint Large Scale Scientific Facility Funds of the NSFC,Chinese Academy of Sciences(CAS)under Grant No.U1832121,Shanghai Pujiang Program under Grant No.18PJ1401000,Open Research Program of Large Research Infrastructures(2017),CAS,the DFG(SFB,TR 110,“Symmetries and the Emergence of Structure in QCD”),the Chinese Academy of Sciences(CAS) President’s International Fellowship Initiative(PIFI)under Grant No.2018DM0034,Volkswagen Stiftung under Grant No.93562
分类号: O571.418
页码: 1309-1318
总页数: 10
文件大小: 950K
下载量: 2