Heavy Quark Analogues of the Theta and Their Excitations

Details Heavy Quark Analogues of the Theta and Their Excitations Heavy Quark Analogues of the Theta and Their Excitations

2004-08-11

arxiv.org/abs/hep-ph/0408145v1

Phys.Lett.B604:175-182,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, RevTeX4

Scientific paper

10.1016/j.physletb.2004.11.012

Predictions for the low-lying excitation spectrum of positive parity pentaquark systems containing one c or b antiquark and four light u,d quarks are obtained in the quark model picture for models with spin-dependent interactions given either by effective color magnetic (CM) exchange or effective Goldstone boson (GB) exchange. For the GB model, 4 excited states are predicted to lie within roughly the N-Delta splitting of the J=1/2 positive parity ground state while, for the CM model, 10 states are expected in the same range. Both the lowest excitation energy and the relative splittings are much smaller in the CM case. These predictions are on the same footing as those for the analogous splittings in the non-exotic baryon sector and, as such, provide a means of not only testing the models, but potentially ruling out either one, or both.

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