Effectiveness of effective field theory in peripheral nucleon-nucleon scattering
- Theoretical Physics Group, Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL (United Kingdom)
Peripheral nucleon-nucleon scattering is analyzed in the framework of an effective field theory. Distorted-wave methods are used to remove the effects of one-pion exchange. Two-pion exchange and recoil corrections to one-pion exchange are then subtracted pertubatively. This removes all contributions up to order Q{sup 3} in the chiral expansion. We have applied this to the {sup 1}D{sub 2}, {sup 1}F{sub 3}, and {sup 1}G{sub 4} waves, using phase shifts from various partial-wave analyses by the Nijmegen group. In regions where these analyses agree we find no evidence for a breakdown of the chiral expansion. One of the terms in the effective short-range potential, the leading one in the {sup 1}D{sub 2} channel, is larger than might be expected, but in general these terms have momentum scales of about 300-400 MeV. We also see hints of isospin breaking in the {pi}N couplings.
- OSTI ID:
- 20695717
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 70, Issue 5; Other Information: DOI: 10.1103/PhysRevC.70.054002; (c) 2004 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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