Testing semilocal chiral two-nucleon interaction in selected electroweak processes

作     者：R. Skibiński J. Golak K. Topolnicki H. Witała E. Epelbaum H. Krebs H. Kamada Ulf-G. Meißner A. Nogga 

作者机构：Institut für Kernphysik Institute for Advanced Simulation and Jülich Center for Hadron Physics Forschungszentrum Jülich D-52425 Jülich Germany and JARA-High Performance Computing Forschungszentrum Jülich D-52425 Jülich Germany 

出 版 物：《Physical Review C》 (物理学评论C辑：核物理学)

年 卷 期：2016年第93卷第6期

页      面：064002-064002页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Polish National Science Center [DEC-2013/10/M/ST2/00420, DEC-2013/11/N/ST2/03733] ERC [259216 NuclearEFT] DFG [SFB/TR 16] Chinese Academy of Science(CAS) [2015VMA076] 

主　　题：Electroweak interactions in nuclear physics Nuclear forces Nuclear reactions 

摘      要：The recently developed semilocal improved chiral nucleon-nucleon interaction is used for the first time to study several electromagnetic and weak processes at energies below the pion production threshold. Cross sections and selected polarization observables for deuteron photodisintegration, nucleon-deuteron radiative capture, three-body He3 photodisintegration, as well as capture rates for decays of the muonic H2 and He3 atoms are calculated. The Lippmann-Schwinger and Faddeev equations in momentum space are solved to obtain nuclear states. The electromagnetic current operator is taken as a single nucleon current supplemented by many-body contributions induced via the Siegert theorem. For muon capture processes the nonrelativistic weak current together with the dominant relativistic corrections is used. Our results compare well with experimental data, demonstrating the same quality as is observed for the semiphenomenological Argonne V18 potential. Compared to the older version of the chiral potential with a nonlocal regularization, a much smaller cut-off dependence is found for the state-of-art chiral local interaction employed in this paper. Finally, estimates of errors due to the truncation of the chiral expansion are given.