Status of effective field theory of NN scattering
There exist many nucleon-nucleon potentials which reproduce phase shifts and nuclear properties with remarkable accuracy. Three fundamental features are shared by these potential models: (1) pions are important at long distances, (2) there is a source of intermediate-range attraction, and (3) there is a source of short-distance repulsion. However, in general, distinct physical mechanisms in these models account for the same feature of the nuclear force. Agreement with experiment is maintained in spite of these differences because of the large number of fit parameters. Systematic approaches to the scattering of strongly interacting particles, such as chiral perturbation theory, are based on the ideas of effective field theory (EFT). The author reviews recent progress in developing a systematic power counting scheme for scattering processes involving more than one nucleon.
- Research Organization:
- Univ. of Maryland, Dept. of Physics, College Park, MD (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- FG02-93ER40762
- OSTI ID:
- 674808
- Report Number(s):
- DOE/ER/40762-151; CONF-9805110-; ON: DE99000272; TRN: 99:000925
- Resource Relation:
- Conference: MESON `98: international workshop on production, properties and interaction of mesons and conference on structure of mesons, baryons and nuclei, Cracow (Poland), 27-30 May 1998; Other Information: PBD: Jun 1998
- Country of Publication:
- United States
- Language:
- English
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