Faddeev description of two-hole-one-particle motion and the single-particle spectral function
Articolo
Data di Pubblicazione:
2001
Citazione:
Faddeev description of two-hole-one-particle motion and the single-particle spectral function / C. Barbieri, W.H. Dickhoff. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 63:3(2001), pp. 034313.1-034313.12.
Abstract:
The Faddeev technique is employed to address the problem of describing the influence of both particle-particle and particle-hole phonons on the single-particle self-energy. The scope of the few-body Faddeev equations is extended to describe the motion of two-hole-one-particle (two-particle-one-hole) excitations. This formalism allows one to sum both particle-particle and particle-hole phonons, obtained separately in the random phase approximation. The appearance of spurious solutions for the present application of the Faddeev method is related to the inclusion of a consistent set of diagrams. The formalism presented here appears practical for finite nuclei and achieves a simultaneous inclusion of particle-particle and particle-hole phonons to all orders while the spurious solutions are properly eliminated.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
many-body theory; spectroscopic factors; spurious solutions; O-16; O-16(E,E’P); equations; strenght; nuclei; RPA
Elenco autori:
C. Barbieri, W.H. Dickhoff
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