Strange baryon spectroscopy in the relativistic quark model

Mass spectra of strange baryons are calculated in the framework of the relativistic quark model based on the quasipotential approach. Baryons are treated as relativistic quark-diquark bound systems. It is assumed that two quarks with equal constituent masses form a diquark. The diquark excitations and its internal structure are consistently taken into account. Calculations are performed up to rather high orbital and radial excitations of strange baryons. On this basis the Regge trajectories are constructed. The obtained results are compared with available experimental data and previous predictions. It is found that all masses of the 4- and 3-star states of strange baryons with established quantum numbers, as well as most of the 2- and 1-star states, are well reproduced. The developed relativistic quark-diquark model predicts less excited states than three-quark models of strange baryons.

Note:

21 pages, 3 figures

14.20.Jn
12.39.Ki
12.39.Pn
quark model: relativistic
hyperon: excited state
hyperon: mass spectrum
hyperon: model
diquark: excited state
model: (quark diquark)
interaction: (quark diquark)

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