Two-pion exchange potential and the {pi}N amplitude
Journal Article
·
· Phys.Rev. C54 (1996) 2235-2239
OSTI ID:756661
The authors discuss the two-pion exchange potential which emerges from a box diagram with one nucleon (the spectator) restricted to its mass shell, and the other nucleon line replaced by a subtracted, covariant {pi}N scattering amplitude which includes {Delta}, Roper, and D{sub 13} isobars, as well as contact terms and off-shell (non-pole) dressed nucleon terms. The {pi}N amplitude satisfies chiral symmetry constraints and fits {pi}N data below {approximately} 700 MeV pion energy. They find that this TPE potential can be well approximated by the exchange of an effective sigma and delta meson, with parameters close to the ones used in one-boson-exchange models that fit NN data below the pion production threshold.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 756661
- Report Number(s):
- DOE/ER/40150-1602; CFNUL-96-04; WM-96-106; CEBAF-TH-96-11
- Journal Information:
- Phys.Rev. C54 (1996) 2235-2239, Journal Name: Phys.Rev. C54 (1996) 2235-2239
- Country of Publication:
- United States
- Language:
- English
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