Testing semi-local chiral two-nucleon interaction in selected electroweak processes

Abstract

The recently developed semi-local 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 ${}^3$He photodisintegration as well as capture rates for decays of the muonic ${}^2$H and ${}^3$He 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 semi-phenomenological AV18 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.

arXiv comment23 pages, 12 eps figures, improved version accepted to Phys. Rev. C. Note, the title of the manuscript is changed

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Cited by in corpus (13)

• Semilocal momentum-space regularized chiral two-nucleon potentials up to fifth order
• Light nuclei with semilocal momentum-space regularized chiral interactions up to third order
• Few- and many-nucleon systems with semilocal coordinate-space regularized chiral two- and three-body forces
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• Towards high-order calculations of three-nucleon scattering in chiral effective field theory
• Few- and many-nucleon systems with semilocal coordinate-space regularized chiral nucleon-nucleon forces
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• Theoretical uncertainties of the elastic nucleon-deuteron scattering observables
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• Nucleon-deuteron scattering with the JISP16 potential
• Pion absorption from the lowest atomic orbital in 2H, 3H and 3He