The $πσ$-Axial Exchange Current

Details The $πσ$-Axial Exchange Current The $πσ$-Axial Exchange Current

1993-11-25

arxiv.org/abs/nucl-th/9311032v1

Phys.Lett. B333 (1994) 17-21

Physics

Nuclear Physics

Nuclear Theory

10pages, Latex file

Scientific paper

10.1016/0370-2693(94)91001-4

The axial exchange current operator that arises from the coupling of the axial field to the pion and effective scalar field in nuclei is constructed. The spatial dependence of this exchange current operator may be determined directly from the nucleon-nucleon interaction. This "$\pi\sigma$"-axial exchange current contributes about 5\% to the quenching of the nucleon axial current coupling constant $g_A^{GT}$ in heavy nuclei.

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