Analysis of exchange terms in a projected extended random phase approximation theory applied to the quasielastic (e,e') reaction

A systematic study of the influence of exchange terms in the longitudinal and transverse nuclear response to quasi-elastic (e,e') reactions is presented. The study is performed within the framework of the extended random phase approximation (ERPA), which in conjuction with a projection method p...

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Detalles Bibliográficos
Autores principales: Bauer, Eduardo, Polls, Artur, Ramos, Angels
Formato: Articulo
Lenguaje:Inglés
Publicado: 1998
Materias:
Física
Order (group theory)
Physics
Statistical physics
Random phase approximation
Transverse plane
Residual
Nuclear matter
Many-body theory
Nuclear theory
Projection method
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/122988
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
Descripción
Sumario:A systematic study of the influence of exchange terms in the longitudinal and transverse nuclear response to quasi-elastic (e,e') reactions is presented. The study is performed within the framework of the extended random phase approximation (ERPA), which in conjuction with a projection method permits a separation of various contributions tied to different physical processes. The calculations are performed in nuclear matter up to second order in the residual interaction for which we take a (pi+rho)-model with the addition of the Landau-Migdal g'-parameter. Exchange terms are found to be important only for the RPA-type contributions around the quasielastic peak.

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