title: Disentangling the dynamical origin of P11 nucleon resonances.
abstract: 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.
authors.affiliation: Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Suzuki
authors.forename: B
authors.initials: B
authors.lastname: Juliá-Díaz
authors.forename: H
authors.initials: H
authors.lastname: Kamano
authors.forename: T-S H
authors.initials: TS
authors.lastname: Lee
authors.forename: A
authors.initials: A
authors.lastname: Matsuyama
authors.forename: T
authors.initials: T
authors.lastname: Sato