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The three- and four-nucleon systems from chiral effective field theory

E. Epelbaum·H. Kamada·A. Nogga·H. Witala·W. Glöckle·Ulf-G. Meißner
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Abstract

Recently developed chiral nucleon-nucleon (NN) forces at next-to-leading order (NLO) that describe NN phase shifts up to about 100 MeV fairly well have been applied to 3N and 4N systems. Faddeev-Yakubovsky equations have been solved rigorously. The chiral NLO forces depend on a momentum cut-off Λlying between 540-600 MeV/c. The resulting 3N and 4N binding energies are in the same range as found using standard NN potentials. In additon, low-energy 3N scattering observables are very well reproduced like for standard NN forces. Surprisingly, the long standing A_y-puzzle is resolved at NLO. The cut-off dependence of the scattering observables is rather mild.

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E. Epelbaum, H. Kamada, A. Nogga, H. Witala, W. Glöckle, Ulf-G. Meißner. 2000-07-25. The three- and four-nucleon systems from chiral effective field theory. https://doi.org/10.1103/physrevlett.86.4787

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