Exotic baryon multiplets at large number of colours

Details Exotic baryon multiplets at large number of colours Exotic baryon multiplets at large number of colours

2003-09-17

arxiv.org/abs/hep-ph/0309203v2

Phys.Rev. D69 (2004) 056002

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 p., 5 figs. New section and references added

Scientific paper

10.1103/PhysRevD.69.056002

We generalize the usual octet, decuplet and exotic antidecuplet and higher baryon multiplets to any number of colours Nc. We show that the multiplets fall into a sequence of bands with O(1/Nc) splittings inside the band and O(1)splittings between the bands characterized by "exoticness", that is the number of extra quark-antiquark pairs needed to compose the multiplet. Each time one adds a pair the baryon mass is increased by the same constant which can be interpreted as a mass of a quark-antiquark pair. At the same time, we prove that masses of exotic rotational multiplets are reliably determined at large Nc from collective quantization of chiral solitons.

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