Chiral soliton models, large N_c consistency and the Theta^+ exotic baryon

Details Chiral soliton models, large N_c consistency and the Theta^+ exotic baryon Chiral soliton models, large N_c consistency and the Theta^+ exotic baryon

2003-09-10

arxiv.org/abs/hep-ph/0309111v3

Phys.Lett. B581 (2004) 175-181

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 figure. This is the version to be published; minor typos have been corrected and a reference added

Scientific paper

10.1016/j.physletb.2003.11.065

Predictions for a light collective $\Theta^+$ baryon state (with strangeness +1) based on the collective quantization of chiral soliton models are shown to be inconsistent with large $N_c$ QCD. The lightest strangeness +1 state to emerge from the analysis has an excitation energy which at large $N_c$ scales as $N_c^0$ while collective quantization is legitimate only for excitations which go to zero as $N_c \to \infty$. This inconsistency strongly suggests that predictions for $\Theta^+$ properties based on collective quantization of chiral solitons are not valid.

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