Precision Nucleon-Nucleon Potential at Fifth Order in the Chiral Expansion

作     者：E. Epelbaum H. Krebs U.-G. Meißner 

作者机构：Institut für Theoretische Physik II Ruhr-Universität Bochum D-44780 Bochum Germany Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics Universität Bonn D-53115 Bonn Germany Institut für Kernphysik Institute for Advanced Simulation and Jülich Center for Hadron Physics Forschungszentrum Jülich D-52425 Jülich Germany JARA–High Performance Computing Forschungszentrum Jülich D-52425 Jülich Germany 

出 版 物：《Physical Review Letters》 (Phys Rev Lett)

年 卷 期：2015年第115卷第12期

页      面：122301-122301页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

基　　金：Massachusetts Department of Fish and Game, DFG European Commission, EC European Research Council, ERC Seventh Framework Programme, FP7, (283286, 259218) Seventh Framework Programme, FP7 National Natural Science Foundation of China, NSFC, (CRC 110) National Natural Science Foundation of China, NSFC 

主　　题：PARTICLES (Nuclear physics) -- Chirality PIONS PION production NUCLEAR forces (Physics) COULOMB functions SCATTERING 

摘      要：We present a nucleon-nucleon potential at fifth order in chiral effective field theory. We find a substantial improvement in the description of nucleon-nucleon phase shifts as compared to the fourth-order results utilizing a coordinate-space regularization. This provides clear evidence of the corresponding two-pion exchange contributions with all low-energy constants being determined from pion-nucleon scattering. The fifth-order corrections to nucleon-nucleon observables appear to be of a natural size, which confirms the good convergence of the chiral expansion for nuclear forces. Furthermore, the obtained results provide strong support for the novel way of quantifying the theoretical uncertainty due to the truncation of the chiral expansion proposed by the authors. Our work opens up new perspectives for precision ab initio calculations in few- and many-nucleon systems and is especially relevant for ongoing efforts towards a quantitative understanding of the structure of the three-nucleon force in the framework of chiral effective field theory.