Abstract
Calculations of helicity amplitudes for the low-lying nucleon resonances are displayed based on a non-relativistic constituent quark model with a harmonic oscillator confinement. The explicit effect of quark confinement is shown. Our results show that the effect plays sizable role on some transition amplitudes of and resonances . The effect on the transition amplitudes is less than 10%. However, the effect on the Roper resonance is remarkable but is inconclusive.
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