Baryons are studied in the constituent quark model by reducing the three-body problem to equivalent two-body problems involving a diquark and a quark. Rotational and radial excitations of the diquark or of the third quark are calculated by using nonrelativistic mesonic qq̄ potentials which are fitted to meson masses. The results are found to be in good agreement with experimental baryon masses. A strong suppression of the mesonic spin-orbit potential is required for light baryons, in agreement with the conclusion of other authors.
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Liu et al. (1983) studied this question.
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