R. Navarro Perez, J. E. Amaro, E. Ruiz Arriola
We undertake a simultaneous partial wave analysis to proton-proton and neutron-proton scattering data below pion production threshold up to LAB energies of 350MeV. We represent the interaction as a sum of delta-shells in configuration space below the 3fm and a charge dependent one pion exchange potential above 3fm together with electromagnetic effects. We obtain chi^2 = 2740|pp + 3835|np with a total of N = 2734|pp + 3610|np data obtained till 2007 and a total number of 46 fitting parameters yielding chi^2/d.o.f = 1.04. Special attention is payed to estimate the errors of the phenomenological interaction as well as the derived effects on the phase- shifts and scattering amplitudes.
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http://arxiv.org/abs/1304.0895
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