title: Reconstructing the nucleon-nucleon potential by a new coupled-channel inversion method.
abstract: A second-order supersymmetric transformation is presented, for the two-channel Schrödinger equation with equal thresholds. It adds a Breit-Wigner term to the mixing parameter, without modifying the eigenphase shifts, and modifies the potential matrix analytically. The iteration of a few such transformations allows a precise fit of realistic mixing parameters in terms of a Padé expansion of both the scattering matrix and the effective-range function. The method is applied to build an exactly solvable potential for the neutron-proton (3)S1-(3)D1 case.
authors.affiliation: Physics Department, Tomsk State University, 36 Lenin Avenue, 634050 Tomsk, Russia.
authors.forename: Andrey
authors.initials: A
authors.lastname: Pupasov
authors.forename: Boris F
authors.initials: BF
authors.lastname: Samsonov
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Sparenberg
authors.forename: Daniel
authors.initials: D
authors.lastname: Baye