Experimental baryon and meson mass spectra show Wigner-like (chaotic) level spacing statistics, while most quark model and lattice QCD spectra show Poisson-like (regular) statistics.
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Spectral-statistics properties of the experimental and theoretical light baryon and meson spectra
Experimental baryon and meson mass spectra show Wigner-like (chaotic) level spacing statistics, while most quark model and lattice QCD spectra show Poisson-like (regular) statistics.