Hyperons in Two Flavor Chiral Perturbation Theory

Details Hyperons in Two Flavor Chiral Perturbation Theory Hyperons in Two Flavor Chiral Perturbation Theory

2008-08-04

arxiv.org/abs/0808.0482v2

Phys.Lett.B669:246-253,2008

Physics

Nuclear Physics

Nuclear Theory

14 pages, 3 figs, version published in PLB

Scientific paper

10.1016/j.physletb.2008.09.054

We use two-flavor chiral perturbation theory to describe hyperons. We focus on the strangeness conserving sector, and, as an example, calculate hyperon masses. Convergence of this two-flavor chiral expansion for observables is improved over the three-flavor theory. The cost, however, is a larger number of low-energy constants that must be ultimately determined from lattice QCD data. A formula for the mass of the omega baryon is derived to sixth order in this expansion, and will aid lattice practitioners in scale setting or tuning the strange quark mass.

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