Hyperon Axial Charges in Two-Flavor Chiral Perturbation Theory

Abstract

We use two-flavor heavy baryon chiral perturbation theory to investigate the isovector axial charges of the spin one-half hyperons. Expressions for these hyperon axial charges are derived at next-to-leading order in the chiral expansion. We utilize phenomenological and lattice QCD inputs to assess the convergence of the two-flavor theory, which appears to be best for cascades.

4 pages, 1 figures, published version

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• Towards grounding nuclear physics in QCD
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• Kaon Thresholds and Two-Flavor Chiral Expansions for Hyperons
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• Axial transition form factors of octet baryons in the perturbative chiral quark model
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• Meson-Baryon Scattering Parameters from Lattice QCD with an Isospin Chemical Potential
• Topics in Lattice QCD and Effective Field Theory
• Baryon axial charges from Chirally Improved fermions - first results
• Two-Flavor Chiral Perturbation Theory for Hyperons