Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1997-05-05
Phys.Rev.C57:3406-3413,1998
Physics
Nuclear Physics
Nuclear Theory
21 pages, LaTeX
Scientific paper
10.1103/PhysRevC.57.3406
We study the performance of some recent potential models suggested as effective interactions between constituent quarks. In particular, we address constituent quark models for baryons with hybrid Q-Q interactions stemming from one-gluon plus meson exchanges. Upon recalculating two of such models we find them to fail in describing the N and \Delta spectra. Our calculations are based on accurate solutions of the three-quark systems in both a variational Schr\"odinger and a rigorous Faddeev approach. It is argued that hybrid {Q-Q} interactions encounter difficulties in describing baryon spectra due to the specific contributions from one-gluon and pion exchanges together. In contrast, a chiral constituent quark model with a Q-Q interaction solely derived from Goldstone-boson exchange is capable of providing a unified description of both the N and \Delta spectra in good agreement with phenomenology.
Glozman Leonid Ya.
Papp Zoltan
Plessas Willibald
Varga Kalman
Wagenbrun R. F.
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