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Optimized Chiral Nucleon-Nucleon Interaction at Next-to-Next-to-Leading Order

A. Ekstrom ; G. Baardsen ; Christian Forssén (Institutionen för fundamental fysik, Subatomär fysik) ; G. Hagen ; M. Hjorth-Jensen ; G. R. Jansen ; R. Machleidt ; W. Nazarewicz ; T. Papenbrock ; J. Sarich ; S. M. Wild
Physical Review Letters (0031-9007). Vol. 110 (2013), 19, p. Art. no. 192502.
[Artikel, refereegranskad vetenskaplig]

We optimize the nucleon-nucleon interaction from chiral effective field theory at next-to-next-to-leading order (NNLO). The resulting new chiral force NNLOopt yields chi(2) approximate to 1 per degree of freedom for laboratory energies below approximately 125 MeV. In the A = 3, 4 nucleon systems, the contributions of three-nucleon forces are smaller than for previous parametrizations of chiral interactions. We use NNLOopt to study properties of key nuclei and neutron matter, and we demonstrate that many aspects of nuclear structure can be understood in terms of this nucleon-nucleon interaction, without explicitly invoking three-nucleon forces.

Nyckelord: effective-field theory, scattering data, momentum-space, forces, deuteron, systems, shift

Denna post skapades 2013-06-17. Senast ändrad 2016-08-18.
CPL Pubid: 178582


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Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)



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Denna publikation är ett resultat av följande projekt:

Ab initio approach to nuclear structure and reactions (++) (ANSR) (EC/FP7/240603)