Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2003-03-17
J.Phys.A37:8991-9021,2004
Physics
Nuclear Physics
Nuclear Theory
15 pages, revtex
Scientific paper
10.1088/0305-4470/37/38/006
A generalized contour deformation method (GCDM) which combines complex rotation and translation in momentum space, is discussed. GCDM gives accurate results for bound, virtual (antibound), resonant and scattering states starting with a realistic nucleon-nucleon interaction. It provides a basis for full off-shell $t$-matrix calculations both for real and complex input energies. Results for both spectral structures and scattering amplitudes compare perfectly well with exact values for the separable Yamaguchi potential. Accurate calculation of virtual states in the Malfliet-Tjon and the realistic CD-Bonn nucleon-nucleon interactions are presented. GCDM is also a promising method for the computation of in-medium properties such as the resummation of particle-particle and particle-hole diagrams in infinite nuclear matter. Implications for in-medium scattering are discussed.
Hagen Gaute
Hjorth-Jensen Morten
Vaagen Jan S.
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