Chiral perturbation theory in few-body systems
Identifieur interne : 000610 ( Main/Exploration ); précédent : 000609; suivant : 000611Chiral perturbation theory in few-body systems
Auteurs : U. Van Kolck [États-Unis]Source :
- Nuclear Physics, Section A [ 0375-9474 ] ; 1998.
Abstract
An effective hadronic field theory provides a framework to carry out systematic and consistent calculations of low-energy strong interaction processes. Its fundamental ingredient is chiral symmetry, which ensures a perturbative expansion of the nuclear potential in loops and many-nucleon effects. The two-nucleon potential to a certain order in this expansion provides a good fit to deuteron properties and to phase shifts up to 100 MeV laboratory energies. A consistent three-nucleon potential can also be obtained. Isospin violation from the quark mass difference and electromagnetism is shown to obey an observed hierarchy. Processes involving external probes—pion-deuteron scattering, proto-neutron radiative capture, pion photoproduction on the deuteron, and pion production in proton-proton collisions— are also discussed in the same framework.
Url:
DOI: 10.1016/S0375-9474(98)00015-3
Affiliations:
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<front><div type="abstract" xml:lang="en">An effective hadronic field theory provides a framework to carry out systematic and consistent calculations of low-energy strong interaction processes. Its fundamental ingredient is chiral symmetry, which ensures a perturbative expansion of the nuclear potential in loops and many-nucleon effects. The two-nucleon potential to a certain order in this expansion provides a good fit to deuteron properties and to phase shifts up to 100 MeV laboratory energies. A consistent three-nucleon potential can also be obtained. Isospin violation from the quark mass difference and electromagnetism is shown to obey an observed hierarchy. Processes involving external probes—pion-deuteron scattering, proto-neutron radiative capture, pion photoproduction on the deuteron, and pion production in proton-proton collisions— are also discussed in the same framework.</div>
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