Charge-symmetry-breaking corrections to pseudoscalar meson-nucleon coupling constants due to up-down current quark mass difference and their effects onNNscattering lengths
- 1 October 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review C
- Vol. 38 (4), 1822-1827
- https://doi.org/10.1103/physrevc.38.1822
Abstract
The charge-symmetry-breaking corrections due to the isospin breaking part of the quantum chromodynamic Hamiltonian, determined by the up-down current quark mass difference, ), on πNN and ηNN coupling constants and their effect on (δa are estimated. The effects of on the pseudoscalar meson-nucleon coupling constants are calculated via -η,η’ mixing, giving rise to charge-symmetry-breaking one-boson-exchange [one-pion-exchange and one-η-exchange] and two-boson-exchange [two-pion-exchange, πη-exchange etc.] potentials. The importance of charge-symmetry-breaking two-boson exchange is emphasized.
Keywords
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