Decays of Non-Strange Positive Parity Excited Baryons in the 1/Nc Expansion

Abstract

The decays of non-strange positive parity excited baryons via emission of a pseudo-scalar meson are studied in the framework of the 1/Nc expansion to order 1/Nc. In particular, the pionic decays of the l=0 Roper baryons and of the l=2 baryons in the mass interval 1680-1950 MeV are analyzed using the available partial decay widths. Decay widths by emission of an eta meson are shown to be suppressed by a factor 1/Nc^2 with respect to the pionic ones.

16 pages, 8 tables

References in corpus (4)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• The $[56,4^{+}]$ baryons in the $1/N_c$ expansion
• Decays of Non-strange Negative Parity Baryons in the 1/Nc Expansion
• 1/Nc Countings in Baryons

Cited by in corpus (9)

• Strong decay of low-lying $S_{11}$ and $D_{13}$ nucleon resonances to pseudoscalar mesons and octet baryons
• Regge approach to charged-pion photoproduction at invariant energies above 2 GeV
• Phenomenology of the Baryon Resonance 70-plet at Large N_c
• Baryon resonances in large $N_c$ QCD
• Photo-production of Positive Parity Excited Baryons in the 1/Nc Expansion of QCD
• Baryon Regge Trajectories in the Light of the $1/N_c$ Expansion
• Analysis of 56-plet positive parity baryon decays in the 1/Nc expansion
• Pion Electroproduction Amplitude Relations in the 1/N_c Expansion
• pi N --> Multi-pi N Scattering in the 1/N_c Expansion