Relativistic two-body processes in axial-charge transitions
Abstract
We study the contribution of two-body meson-exchange processes to axial-charge transitions using relativistic models of the nucleus. We conduct calculations at the mean-field and oneloop levels for nuclei in the lead region and also for tin and oxygen. The aim is to provide a comprehensive one-body plus two-body treatment within the relativistic framework. The results indicate that one- and two-body processes enhance the matrix elements of the axial-charge operator by some (70 ± 20) % in all three regions studied, in good qualitative agreement with the data and more conventional calculations. We also discuss the sensitivities of the calculation to the change in some of the couplings and the parameters involved.
- Publication:
-
Nuclear Physics A
- Pub Date:
- February 1996
- DOI:
- 10.1016/S0375-9474(96)00276-X
- arXiv:
- arXiv:nucl-th/9504009
- Bibcode:
- 1996NuPhA.609..437I
- Keywords:
-
- Nuclear Theory
- E-Print:
- 23 pages, RevTeX format, 5 PostScript figures available on request