On the fourth P_11 resonance predicted by the constituent quark model

Details On the fourth P_11 resonance predicted by the constituent quark model On the fourth P_11 resonance predicted by the constituent quark model

2001-04-06

arxiv.org/abs/nucl-th/0104024v1

Phys.Rev. C64 (2001) 068201

Physics

Nuclear Physics

Nuclear Theory

3 pages, using revtex

Scientific paper

10.1103/PhysRevC.64.068201

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.

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