Weak axial exchange currents for the Bethe-Salpeter equation

Details Weak axial exchange currents for the Bethe-Salpeter equation Weak axial exchange currents for the Bethe-Salpeter equation

1999-11-05

arxiv.org/abs/nucl-th/9911022v2

Nucl.Phys. A673 (2000) 455-478

Physics

Nuclear Physics

Nuclear Theory

26 pages with 1 figure, LaTeX, feynman, submitted to Nucl. Phys. A. A small grammatical change in Acknowledgments

Scientific paper

10.1016/S0375-9474(00)00060-9

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.

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