2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126311We first present two possible analytic continuations of the Lippmann-Schwinger eigenfunctions to the second sheet of the Riemann surface, and then we compare the different Gamow vectors that are obtained through each analytic continuation.Contribution to the Lisbon conference on time asymmetry and resonances, July 2003; 8 pagesQuantum PhysicsHigh Energy Physics - TheoryMathematical Physicstext