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 任修磊;王春宣;李凯文;耿立升;孟杰(State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China;Institut fur Theoretische Physik Ⅱ,Ruhr-Universitat Bochum,D-44780 Bochum,Germany;School of Physics,Beihang University,Beijing 102206,China;Yukawa Institute for Theoretical Physics,Kyoto University,Kyoto 606-8502,Japan;Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing 100191,China;School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China [2]Institut fur Theoretische Physik Ⅱ,Ruhr-Universitat Bochum,D-44780 Bochum,Germany [3]School of Physics,Beihang University,Beijing 102206,China [4]Yukawa Institute for Theoretical Physics,Kyoto University,Kyoto 606-8502,Japan [5]Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing 100191,China [6]School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Chinese Physics Letters》2021年第6期18-23,共6页中国物理快报（英文版）

基　　金：Supported by the China Scholarship Council,the National Natural Science Foundation of China(Grant Nos.11375024,11522539,11735003,11335002,and 11775099);NSFC and DFG through funds provided to the Sino-German CRC 110“Symmetries and the Emergence of Structure in QCD”(NSFC Grant No.11621131001,DFG Grant No.TRR110);the China Postdoctoral Science Foundation(Grant Nos.2016M600845 and 2017T100008);the Major State 973 Program of China(Grant No.2013CB834400);the Fundamental Research Funds for the Central Universities。

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 ^(1)S_(0) channel which features several lowenergy scales.In addition to being self-consistent,we show that the resulting relativistic potential can describe quite well the unique features of the ^(1)S_(0) 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.

关 键 词：EQUATION RELATIVISTIC SEPARABLE 

分 类 号：O571[理学—粒子物理与原子核物理]