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

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

2000-07-25

arxiv.org/abs/nucl-th/0007057v1

Phys.Rev.Lett. 86 (2001) 4787-4790

Physics

Nuclear Physics

Nuclear Theory

4 pp, revtex, 3 figures

Scientific paper

10.1103/PhysRevLett.86.4787

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 \Lambda lying 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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