Relativistic Chiral Description of the 1S0 Nucleon-Nucleon Scattering

• 作者: Xiu-Lei Ren Chun-Xuan Wang Kai-Wen Li Li-Sheng Geng Jie Meng
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: NUCLEAR PHYSICS
• 页码范围: 20-25
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0256-307X/38/6/062101

摘要

Recently,a relativistic chiral nucleon-nucleon interaction was formulated up to leading order,which provides a good description of the phase shifts of J ≤ 1 partial waves[Chin.Phys.C 42 (2018) 014103].Nevertheless,a separable regulator function that is not manifestly covariant was used in solving the relativistic scattering equation.In the present work,we first explore a covariant and separable form factor to regularize the kernel potential and then apply it to study the simplest but most challenging 1S0 channel which features several low-energy scales.In addition to being self-consistent,we show that the resulting relativistic potential can describe quite well the unique features of the 1S0 channel at leading order,in particular the pole position of the virtual bound state and the zero amplitude at the scattering momentum ～340 MeV,indicating that the relativistic formulation may be more natural from the viewpoint of effective field theories.