The eta' in baryon chiral perturbation theory

Details The eta' in baryon chiral perturbation theory The eta' in baryon chiral perturbation theory

2000-01-12

arxiv.org/abs/hep-ph/0001102v1

Phys.Rev. D61 (2000) 014011

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 2 figures

Scientific paper

10.1103/PhysRevD.61.014011

We include in a systematic way the eta' in baryon chiral perturbation theory. The most general relativistic effective Lagrangian describing the interaction of the lowest lying baryon octet with the Goldstone boson octet and the eta' is presented up to linear order in the derivative expansion and its heavy baryon limit is obtained. As explicit examples, we calculate the baryon masses and the pi N sigma-term up to one-loop order in the heavy baryon formulation. A systematic expansion in the meson masses is possible, and appearing divergences are renormalized.

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