Testing semilocal chiral two-nucleon interaction in selected electroweak processes

R. Skibiński, J. Golak, K. Topolnicki, H. Witała, E. Epelbaum, H. Krebs, H. Kamada, Ulf-G. Meißner, and A. Nogga
Phys. Rev. C 93, 064002 – Published 22 June 2016

Abstract

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.

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  • Received 13 April 2016

DOI:https://doi.org/10.1103/PhysRevC.93.064002

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

R. Skibiński, J. Golak, K. Topolnicki, and H. Witała

  • M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30348 Kraków, Poland

E. Epelbaum and H. Krebs

  • Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany

H. Kamada

  • Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu 804-8550, Japan

Ulf-G. Meißner

  • 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; and JARA-High Performance Computing, Forschungszentrum Jülich, D-52425 Jülich, Germany

A. Nogga

  • 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

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Issue

Vol. 93, Iss. 6 — June 2016

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