Abstract.
The recent determination of the charged πNN coupling constant, , by the Uppsala Neutron Research Group implies that there may be considerable charge splitting of the pion coupling constant. We investigate the consequences of this for the charge-independence breaking (CIB) of the scattering length, . We find that depends sensitively on the difference between and the neutral πNN coupling constant, . Moreover, if is only about 3% larger than , then the established theoretical explanation of (in terms of pion-mass splitting) is completely wiped out.
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Received August 20, 1999; revised November 11, 1999; accepted for publication December 29, 1999
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Machleidt, R., Banerjee, M. Charge Dependence of the πNN Coupling Constant and Charge Dependence of the Nucleon-Nucleon Interaction. Few-Body Systems 28, 139–146 (2000). https://doi.org/10.1007/s006010070019
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DOI: https://doi.org/10.1007/s006010070019