The $[{\bf 70},1^-]$ baryon multiplet in the $1/N_c$ expansion revisited

Details The $[{\bf 70},1^-]$ baryon multiplet in the $1/N_c$ expansion revisited The $[{\bf 70},1^-]$ baryon multiplet in the $1/N_c$ expansion revisited

2006-10-31

arxiv.org/abs/hep-ph/0610432v1

AIPConf.Proc.892:285-288,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Presented by N. Matagne at the 7th International Conference on Quark Confinement and Hadron Spectrum (QCHS7), September 2-7 20

Scientific paper

10.1063/1.2714396

The mass splittings of the baryons belonging to the $[{\bf 70},1^-]$-plet are derived by using a simple group theoretical approach to the matrix elements of the mass formula. The basic conclusion is that the first order correction to the baryon masses is of order $1/N_c$ instead of order $N^0_c$, as previously found. The conceptual difference between the ground state and the excited states is therefore removed.

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