Aspects of meson-baryon scattering in three- and two-flavor chiral perturbation theory

Abstract

We analyze meson-baryon scattering lengths in the framework of covariant baryon chiral perturbation theory at leading one-loop order. We compute the complete set of matching relations between the dimension-two low-energy constants in the two- and three-flavor formulations of the theory. We derive new two-flavor low-energy theorems for pion-hyperon and pion-cascade scattering that can be tested in lattice simulations.

22 pages, 5 figures, version published in Phys. Rev. D

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