Proton-proton scattering lengths from effective field theory

Using a recently developed effective field theory for the interactions of n ucleons at non-relativistic energies, we calculate the Coulomb corrections to proton-proton scattering. Including the dimension-eight derivative inter action in PDS regularization scheme, we obtain a modified Jackson-Blatt rel ation for the scattering lengths which is found to be phenomenologically sa tisfactory. The effective range is not modified by Coulomb effects to this order in the calculation. (C) 1999 Published by Elsevier Science B.V, All r ights reserved.