Decays of Non-Strange Positive Parity Excited Baryons in the 1/Nc Expansion
arXiv:hep-ph/0504101 · doi:10.1103/PhysRevD.72.034024
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