Peripheral NN scattering and the role of pi-N LECs

In the first part of this talk I will discuss the problem of the HBChPT formalism applied to the construction of an NN potential, and compare their expressions with ours, based on the relativistic formalism by Becher and Leutwyler. In the second part I will present both results for phase shifts in peripheral waves (L/geq 3), and how they are influenced by the input parameters of the potential.