arXiv:nucl-th/9911022·v2·Nuclear Theory
Weak axial exchange currents for the Bethe-Salpeter equation
F.C.Khanna (Theoretical Physics Institute, University of Alberta, Edmonton, Canada)🇨🇦 · E. Truhlik (Institute of Nuclear Physics, Rez n. Prague, Czech Republic)🇨🇿
Abstract
We construct weak axial one-boson exchange currents for the Bethe-Salpeter equation, starting from chiral Lagrangians of the N-\Delta(1236)-pi-rho-a_1-omega system. The currents fulfil the Ward-Takahashi identities and the matrix element of the full current between the two-body solutions of the Bethe-Salpeter equation satisfies the PCAC constraint exactly.
Comments: 26 pages with 1 figure, LaTeX, feynman, submitted to Nucl. Phys. A. A small grammatical change in Acknowledgments