The low-energy structure of the nucleon–nucleon interaction: statistical versus systematic uncertainties

We analyze the low-energy nucleon-nucleon (NN) interaction by confronting statistical versus systematic uncertainties.This is carried out with the help of model potentials fitted to the Granada-2013 database where a statistically meaningful partial wave analysis comprising a total of 6713 np and pp published scattering data below 350 MeV from 1950 till 2013 has been made.We extract threshold parameter uncertainties from the coupled-channel effective range expansion up to  j 5. We find that for threshold parameters systematic uncertainties are generally at least an order of magnitude larger than statistical uncertainties.Similar results are found for np phase shifts and amplitude parameters.