  In this work we have performed a detailed study of chiral nuclear forces at
N4LO approximation applied to selected channels of the neutron-proton ($n p$)
scattering. The idea is to analyse the different contributions to the
nucleon-nucleon ($NN$) potential by separating the part coming from the
exchange of pions and the one coming from the contact interactions. We consider
two state-of-the-art chiral interactions at N4LO which are constructed using
different regularization procedures: the non-local Idaho-Salamanca force and
the semi-local interaction from the Bochum group. In order to compare the two
types of regularization we consider both interactions with a 500 MeV cutoff and
to analyse the cutoff dependence we select the Bochum potential with three
different cutoff values: 500, 450 and 400 MeV. Our results show that the
balance between pion exchanges and contact interactions depends strongly on the
regularization procedure. The non-local angle-independent regularization of
both components of the interaction implemented in the Idaho-Salamanca potential
make the contact terms to be present at large distances while the local
regularization of the pion exchanges in the Bochum potential restricts the
contact interactions to small distances. Also, the value of the cutoff affects
the strength of the potential but the interplay between pion exchanges and
contact terms remains qualitatively the same.
