Negative-ParityNNResonances and Extraneous States

Abstract

Angular momentum excitations of six quarks in a bag give a rich resonance structure in the $\mathrm{NN}$ channel above $P_{\mathrm{lab}}\simeq 1.3$ GeV/c. Some states occur with quantum numbers foreign to $\mathrm{NN}$, which we refer to as extraneous states. The lowest negative-parity states are an $\mathrm{}\left(\mathrm{NN}\right)\mathrm{}{}_{}{}^1{}_{}{}^{}P_1^{}{}_{}{}^{}$ resonance and two extraneous $I=0\mathrm{}$ states with $J^P=0^{-} \mathrm{and} 2^{-}$, all around 2.2 GeV. The latter two states mainly decay in $\mathrm{NN}\pi$. The lowest $\mathrm{}\left(\mathrm{NN}\right)\mathrm{}{}_{}{}^3{}_{}{}^{}F_3^{}{}_{}{}^{}$ resonance lies at $M=2.34\mathrm{}$ GeV.