N*(1440) decays in a hybrid baryon model Original Research Article

In this work we study the nature of the Roper resonance via its decay processes. We go along with the argument that the Roper resonance is a state of three quarks and one transverse-electric (TE) gluon. A nonrelativistic quark-gluon model is employed, where the dynamics of View the MathML source is described in the effective 3S1 vertex in which a quark-antiquark pair is created (destroyed) from (into) a gluon. The wave function of the Roper resonance is properly constructed to take account into the gluon freedom in the nonrelativistic regime. The evaluated decay width ratios ΓN∗(1440)→Nρ/ΓN∗(1440)→Nπ and ΓN∗(1440)→Nη/ΓN∗(1440)→Nπ are in good agreement with experimental data.