The relativistic chiral Lagrangian for decuplet and octet baryons at next-to-leading order

Abstract

A complete and minimal relativistic Lagrangian is constructed at next-to-leading order for SU(3) chiral perturbation theory in the presence of baryon octet and baryon decuplet states. The Lagrangian has 13 terms for the pure decuplet sector, 6 terms for the transition sector from baryon octet to decuplet and (as already known from the literature) 16 terms for the pure octet sector. The minimal field content of 25 of these terms is meson-baryon four-point interactions. 3 terms give rise to the mass splitting for baryon octet and decuplet states, respectively. 2 terms give rise to overall mass shifts. 4 terms provide anomalous magnetic moments and a decuplet-to-octet magnetic transition moment. 1 term leads to an axial vector transition moment. It is shown that meson-baryon three-point coupling constants come in at leading order whereas no additional one appears in the minimal Lagrangian at next-to-leading order. Those low-energy constants that give rise to mass splitting and magnetic moments, respectively, are determined. Predictions are provided for radiative decays of decuplet to octet baryons.

arXiv comment12 pages

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Cited by in corpus (17)

• The electromagnetic form factors of the transition from the spin-3/2 Sigma to the Lambda hyperon
• Axial-vector form factors of the baryon octet and chiral symmetry
• A covariant model for the decuplet to octet Dalitz decays
• Chiral Lagrangians for mesons with a single heavy quark
• Light-quark mass dependence of the nucleon axial charge and pion-nucleon scattering phenomenology
• Low-energy constants in the chiral Lagrangian with baryon octet and decuplet fields from Lattice QCD data on CLS ensembles
• Density dependence of the quark condensate in isospin-asymmetric nuclear matter
• $\Delta$-baryon axialvector and pseudoscalar form factors, and associated PCAC relations
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• The chiral Lagrangian with three flavors and large-Nc sum rules
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• Electromagnetic transition form factors and Dalitz decays of hyperons