Relativistic Description of Polarization Transfer in Quasielastic Proton-Nucleus Scattering : Nuclear Physics

概要

論文の詳細を見る
Relativistic random-phase-approximation (RPA) description of quasielastic proton-nucleus scattering is developed in a nuclear matter approach. The five Fermi covariants for nucleon-nucleon scattering amplitudes are used as the external fields. The RPA polarization insertions compose four 4×4 matrices to be calculated by solving the Dyson equations. As the particle-hole interaction, σ-,ω-, π- and ρ-meson exchange interactions, as well as a relativistic analogue of the phenomenological Landau-Migdal term, are chosen. The longitudinal and transverse spin-flip probabilities and their ratio are calculated and compared with the Los Alamos data at 500 MeV. Both the results of the Hartree and RPA calculations for the ratio are within the limits of the data, but either of the longitudinal and transverse probabilities cannot be reproduced. The sensitivity of the RPA calculation to the Landau-Migdal parameter is weak. Suggestions for future theoretical work are made.
理論物理学刊行会の論文
1990-02-25