Abstract

Calculations are presented of certain moments of the wave function of the \ensuremath{\Delta} and of the lowest-lying negative-parity resonances. These are used to obtain model distribution amplitudes for these resonances and to calculate the size of the high-${Q}^{2}$ nucleon-resonance transition amplitude for each case. The I=(3/2 resonances are less asymmetric than the I=(1/2 ones, and indeed are compatible with total symmetry and even with being asymptotic; the agreement between calculation and measurement is good for the ${S}_{11}$(1535) transition amplitude although inconclusive for the \ensuremath{\Delta}. (For the isoquartet negative-parity ground state, the data presently hardly exist.)

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