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Spectrum of Hadrons with Strangeness

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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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Authors and Affiliations

  1. Institute for Theoretical Physics and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, People’s Republic of China

    Chen Chen & Shaolong Wan

  2. Institut für Kernphysik, Forschungszentrum Jülich, 52425, Jülich, Germany

    Lei Chang

  3. Physics Division, Argonne National Laboratory, Argonne, IL, 60439, USA

    Chen Chen, Craig D. Roberts & David J. Wilson

  4. Department of Physics, Illinois Institute of Technology, Chicago, IL, 60616, USA

    Chen Chen & Craig D. Roberts

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  1. Chen Chen
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  2. Lei Chang
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  3. Craig D. Roberts
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Correspondence to Craig D. Roberts.

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Chen, C., Chang, L., Roberts, C.D. et al. Spectrum of Hadrons with Strangeness. Few-Body Syst 53, 293–326 (2012). https://doi.org/10.1007/s00601-012-0466-3

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