2-PION EXCHANGE NUCLEON-NUCLEON POTENTIAL - MODEL-INDEPENDENT FEATURES

Citation
Mr. Robilotta et Ca. Darocha, 2-PION EXCHANGE NUCLEON-NUCLEON POTENTIAL - MODEL-INDEPENDENT FEATURES, Nuclear physics. A, 615(3), 1997, pp. 391-416
Citations number
41
Categorie Soggetti
Physics, Nuclear
Journal title
ISSN journal
03759474
Volume
615
Issue
3
Year of publication
1997
Pages
391 - 416
Database
ISI
SICI code
0375-9474(1997)615:3<391:2ENP-M>2.0.ZU;2-U
Abstract
A chiral pion-nucleon amplitude supplemented by the HJS subthreshold c oefficients is used to calculate the the long range part of the two-pi on exchange nucleon-nucleon potential. In our expressions the HJS coef ficients factor out, allowing a clear identification of the origin of the various contributions. A discussion of the configuration space beh aviour of the loop integrals that determine the potential is presented , with emphasis on cancellations associated with chiral symmetry. The profile function for the scalar-isoscalar component of the potential i s produced and shown to disagree with those of several semi-phenomenol ogical potentials. (C) 1997 Elsevier Science B.V.