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Reconstructing the Nucleon-Nucleon Potential by a New Coupled-Channel Inversion Method

par Pupasov, Andrey ;Samsonov, Boris ;Sparenberg, Jean-Marc ;Baye, Daniel Jean
Référence Physical review letters, 106, 15, page (152301)
Publication Publié, 2011-04-11

Article révisé par les pairs

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Résumé :

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 S13-D13 case. © 2011 American Physical Society.