Baryon spectroscopy

  title={Baryon spectroscopy},
  author={Eberhard Klempt and Jean Marc Richard},
About 120 baryons and baryon resonances are known, from the abundant nucleon with u and d light-quark constituents up to the Ξ−b = (bsd) which contains one quark of each generation and to the recently discovered Ω−b = (bss). In spite of this impressively large number of states, the underlying mechanisms leading to the excitation spectrum are not yet understood. Heavy-quark baryons suffer from a lack of known spin-parities. In the light-quark sector, quark-model calculations have met with… 
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