par Vaandrager, Paul 
;Dohet-Eraly, Jérémy ;Sparenberg, Jean-Marc
Référence European Physical Journal A. Hadrons and Nuclei, 60, page (16), 99
Publication Publié, 2024-05-06
;Dohet-Eraly, Jérémy ;Sparenberg, Jean-Marc Référence European Physical Journal A. Hadrons and Nuclei, 60, page (16), 99
Publication Publié, 2024-05-06
Article révisé par les pairs
| Résumé : | The single-channel Jost function is calculatedwith the computational R-matrix on a Lagrange-Jacobi mesh,in order to study its behaviour at complex wavenumbers.Three potentials derived from supersymmetric transforma-tions, two of which never previously studied, are used to testthe accuracy of the method. Each of these potentials, withs-wave or p-wave bound, resonance or virtual states, has asimple analytical expression for the Jost function, which iscompared with the calculated Jost function. Siegert statesand Siegert pseudostates are determined by finding the zerosof the calculated Jost function. Poles of the exact Jost func-tion are not present in the calculated Jost function due to thetruncation of the potential in the R-matrix method. Instead,Siegert pseudostates arise in the vicinity of the missing poles. |
