https://doi.org/10.1051/epjconf/20100305001
Nuclear forces from EFT: Recent developments
1
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and
Bethe Center for Theoretical Physics, Universität Bonn,
D-53115
Bonn,
Germany
2
Forschungszentrum Jülich, Institut für Kernphysik (IKP-3) and
Jülich Center for Hadron Physics, D-52425
Jülich,
Germany
3
Forschungszentrum Jülich, Institut für Kernphysik (IKP-3),
Institite for Advanced Simulation (IAS-4) and Jülich Center for Hadron
Physics, D-52425
Jülich,
Germany
a e-mail: hkrebs@itkp.uni-bonn.de
Nuclear forces are considered based on chiral perturbation theory with and without explicit ∆-isobar degrees of freedom. We discuss the subleading corrections to chiral three-nucleon forces in the ∆-less formalism which contain no additional free parameters. In the formalism with explicit ∆-isobar we present the complete next-to-next-to-leading order analysis of isospin-conserving and next-to-leading order analysis of isospinviolating nuclear forces. The perturbative expansion of nuclear forces in the ∆-full case is shown to have much better convergence compared with the ∆-less theory where the ∆-resonance is integrated out and is encoded in certain low-energy constants.
© Owned by the authors, published by EDP Sciences, 2010
