1.
Phys Rev Lett
; 104(4): 042302, 2010 Jan 29.
Artículo
en Inglés
| MEDLINE
| ID: mdl-20366701
RESUMEN
We show that two almost degenerate poles near the piDelta threshold and the next higher mass pole in the P11 partial wave of piN scattering evolve from a single bare state through its coupling with piN, etaN, and pipiN reaction channels. This finding provides new information on understanding the dynamical origins of the Roper N{*}(1440) and N{*}(1710) resonances listed by Particle Data Group. Our results for the resonance poles in other piN partial waves are also presented.