Jost function for coupled channels

Details Jost function for coupled channels Jost function for coupled channels

1998-08-13

arxiv.org/abs/nucl-th/9808034v1

Few Body Syst.Suppl.10:93-96,1999

Physics

Nuclear Physics

Nuclear Theory

5 pages, latex, no figures, talk given at XVI European Conference on Few-Body Problems in Physics, Autrans, June 1998, to appe

Scientific paper

Recently, we proposed an exact method for direct calculation of the Jost function for central potentials (which may have Coulombic tails) and the Jost matrix for non-central short range potentials. This method works for all real or complex momenta of physical interest, including the spectral points corresponding to bound and Siegert states. In this work we extend it for potentials which couple channels with different thresholds. The proposed method is based on simple differential equations of the first order, which can be easily solved numerically. Thus, the spectrum generated by any given potential can be thoroughly investigated. At the same time the physical wave function can be obtained having the correct asymptotic behaviour.

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