Leading order relativistic chiral nucleon-nucleon interaction  

作　　者：任修磊 李凯文 耿立升 龙炳蔚 Peter Ring 孟杰 

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China [2]Institut for Theoretische Physik II, Ruhr-Universitat Bochum, D-44780 Bochum, Germany [3]School of Physics and Nuclear Energy Engineering & International Research Center for Nuclei and Particles in the Cosmos Beihang University, Beijing 100191, China [4]Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China [5]Center for Theoretical Physics, Department of Physics, Sichuan University, Chengdu, Sichuan 610064, China [6]Physik Department, Technische Universitat Miinchen, D-85748 Garching, Germany

出　　处：《Chinese Physics C》2018年第1期97-106,共10页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11375024,11522539,11335002,11375120);DFG and NSFC 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 Major State 973 Program of China(2013CB834400);the China Postdoctoral Science Foundation(2016M600845,2017T100008);the Fundamental Research Funds for the Central Universities;by the DFG cluster of excellence Origin and Structure of the Universe(www.universe-cluster.de)

摘　　要：Motivated by the successes of relativistic theories in studies of atomic/molecular and nuclear systems and the need for a relativistic chiral force in relativistic nuclear structure studies, we explore a new relativistic scheme to construct the nucleon-nucleon interaction in the framework of covariant chiral effective field theory. The chiral interaction is formulated up to leading order with covariant power counting and a Lorentz invariant chiral Lagrangian.We find that the relativistic scheme induces all six spin operators needed to describe the nuclear force. A detailed investigation of the partial wave potentials shows a better description of the;S——0 and;P;phase shifts than the leading order Weinberg approach, and similar to that of the next-to-leading order Weinberg approach. For the other partial waves with angular momenta J≥1, the relativistic results are almost the same as their leading order non-relativistic counterparts.Motivated by the successes of relativistic theories in studies of atomic/molecular and nuclear systems and the need for a relativistic chiral force in relativistic nuclear structure studies, we explore a new relativistic scheme to construct the nucleon-nucleon interaction in the framework of covariant chiral effective field theory. The chiral interaction is formulated up to leading order with covariant power counting and a Lorentz invariant chiral Lagrangian.We find that the relativistic scheme induces all six spin operators needed to describe the nuclear force. A detailed investigation of the partial wave potentials shows a better description of the^1S——0 and^3P_0 phase shifts than the leading order Weinberg approach, and similar to that of the next-to-leading order Weinberg approach. For the other partial waves with angular momenta J≥1, the relativistic results are almost the same as their leading order non-relativistic counterparts.

关 键 词：covariant chiral perturbation theory nucleon-nucleon interaction relativistic scattering equation 

分 类 号：O572.2[理学—粒子物理与原子核物理] O412.1[理学—物理]