Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-01-21
Phys.Lett. B454 (1999) 115-122
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages,2 figures, revtex
Scientific paper
10.1016/S0370-2693(99)00217-8
The Goldberger-Treiman discrepancy in SU(3) is analyzed in the framework of heavy baryon chiral perturbation theory (HBChPT). It is shown that the discrepancy at leading order is entirely given by counterterms from the order p^3 Lagrangian, and that the first subleading corrections are suppressed by two powers in the HBChPT expansion. These subleading corrections include meson-loop contributions as well as counterterms from the order p^5 Lagrangian. Some one-loop contributions are calculated and found to be small. Using the three discrepancies (pi-N-N, K-N-Lambda and K-N-Sigma) which can be extracted from existing experimental data, we find that the HBChPT calculation favors the smaller g(pi-N-N) values obtained in recent partial wave analyses.
Goity Jose L.
Lewis Randy
Schvellinger Martin
Zhang Lianchang
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