Two-pion exchange contributions to charge asymmetric and charge dependent nuclear forces

Journal Article · Wed Dec 01 04:00:00 EST 1982 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.26.2402· OSTI ID:6615793

Coon, S A; Scadron, M D

We develop a simple but systematic approach to the 2..pi.. exchange contributions to NN scattering graphs. When applied to s-wave NN scattering lengths, this scheme predicts a 2..pi.. contribution of magnitude Vertical Bara/sub n/nVertical Bar/sub 2pi/-Vertical Bara/sub p/pVertical Bar/sub 2pi/roughly-equal1/3 fm and Vertical Bara/sub p/nVertical Bar/sub 2pi/-Vertical Bara/sub n/nVertical Bar/sub 2pi/roughly-equal-1/6 fm. If we then combine this effect with simple ..pi../sup + -/,..pi../sup 0/ and rho/sup + -/,rho/sup 0/ pole graphs, the net charge asymmetric scattering length is Vertical Bara/sub n/nVertical Bar-Vertical Bara/sub p/pVertical Barroughly-equal1.2 fm while the net charge dependent result is Vertical Bara/sub p/nVertical Bar-Vertical Bara/sub n/nVertical Barroughly-equal2.7 fm. This compares favorably with the respective experimental values of approximately 1.5 and 5 fm.

• Research Organization: Physics Department, University of Arizona, Tucson, Arizona 85721
• OSTI ID: 6615793
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 26:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
BOSON-EXCHANGE MODELS
CHARGE DISTRIBUTION
COMPOSITE MODELS
DIMENSIONS
LENGTH
MASS DIFFERENCE
MATHEMATICAL MODELS
NUCLEON-NUCLEON POTENTIAL
OBE MODEL
OPE MODEL
PARTIAL WAVES
PARTICLE MODELS
PARTICLE PROPERTIES
PERIPHERAL MODELS
PERTURBATION THEORY
POTENTIALS
QUARK MODEL
S WAVES
SCATTERING LENGTHS