On the fourth P_11 resonance predicted by the constituent quark model

Abstract

We point out a distinguishing difference between constituent quark models based on one-gluon exchange and one-boson exchange dynamics. In the latter one, the P_11 nucleon resonance with predominantly symmetrical spatial wave function in the N=4 band gets strongly attracted such that it drops below some states in the N=2 band. Calculations of strong decay widths are presented in order to establish an identification with experimental states. Our results are relevant for the interpretation of the fourth P_11 resonance that was found in the partial wave analysis of the Zagreb group and recently discussed by Capstick et. al. in the framework of a model based on one-gluon exchange.

3 pages, using revtex

References in corpus (6)

• Quasi-Two-Body Decays of Nonstrange Baryons
• Unified description of light- and strange-baryon spectra
• pi N --> eta N and eta N --> eta N partial wave T-matrices in a coupled, three channel model
• Effective Q-Q Interactions in Constituent Quark Models
• Strong Pionic Decays From a Spectroscopic Quark Model
• Evidence for the fourth P11 resonance predicted by the constituent quark model