Charge-dependent nucleon-nucleon potential from chiral effective field theory

Citation
M. Walzl et al., Charge-dependent nucleon-nucleon potential from chiral effective field theory, NUCL PHYS A, 693(3-4), 2001, pp. 663-692
Citations number
34
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS A
ISSN journal
0375-9474 → ACNP
Volume
693
Issue
3-4
Year of publication
2001
Pages
663 - 692
Database
ISI
SICI code
0375-9474(20011022)693:3-4<663:CNPFCE>2.0.ZU;2-4
Abstract
We discuss charge-symmetry and charge-independence breaking in a chiral eff ective field theory approach for few-nucleon systems based on a modified We inberg power counting. We construct a two-nucleon potential with bound and scattering states generated by means of a properly regularized Lippmann-Sch winger equation. We systematically introduce strong isospin-violating and e lectromagnetic operators in the theory. We use standard procedures to treat the Coulomb potential between two protons in momentum space. We present re sults for phase shifts in the proton-proton, neutron-proton and the neutron -neutron systems. We discuss the various contributions to charge dependence and charge-symmetry breaking observed in the nucleon-nucleon scattering le ngths. (C) 2001 Elsevier Science B.V. All rights reserved.