Precise determination of charge-dependent pion-nucleon-nucleon coupling constants
Precise determination of charge-dependent pion-nucleon-nucleon coupling constants
We undertake a covariance error analysis of the pion-nucleon-nucleon coupling constants from the Granada-2013 $np$ and $pp$ database, comprising a total of 6720 scattering data below laboratory energy of 350 MeV. Assuming a unique pion-nucleon coupling constant in the one-pion exchange potential above a boundary radius ${r}_{c}=3\phantom{\rule{0.16em}{0ex}}\mathrm{fm}$ we obtain ${f}^{2}=0.0763(1)$. …