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arXiv · 1204.2553

Spectrum of hadrons with strangeness

Chen Chen·Lei Chang·Craig D. Roberts·Shaolong Wan·David J. Wilson
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Abstract

We describe a calculation of the spectrum of strange and nonstrange hadrons that simultaneously correlates the dressed-quark-core masses of meson and baryon ground- and excited-states within a single framework. The foundation for this analysis is a symmetry-preserving Dyson-Schwinger equation treatment of a vector-vector contact interaction. Our results exemplify and highlight the deep impact of dynamical chiral symmetry breaking on the hadron spectrum: an accurate description of the meson spectrum entails a similarly successful prediction of the spectrum of baryons, including those with strangeness. The analysis also provides numerous insights into baryon structure. For example, that baryon structure is largely flavour-blind, the first radial excitation of ground-state baryons is constituted almost entirely from axial-vector diquark correlations, and DCSB is the foundation for the ordering of low-lying baryon levels; viz., (1/2)^+, (1/2)^+, (1/2)^-.

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Chen Chen, Lei Chang, Craig D. Roberts, Shaolong Wan, David J. Wilson. 2012-04-11. Spectrum of hadrons with strangeness. https://doi.org/10.1007/s00601-012-0466-3

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