NUCLEON FORM-FACTORS AND STATIC PROPERTIES OF BARYONS IN A QUARK-MODEL

The nucleon electromagnetic form factors GEp(q2), GMp(q2), GMn(q2), and the axial-vector form factor GA(q2) are calculated in a simple independent-quark model based on the Dirac equation with a logarithmic confining potential of the form V(r)=(1+0)aln(rb). The respective rms radii associated with GEp(q2) and GA(q2) come out as (r2EP)12=0.938 fm and rA212=0.953 fm. The magnetic moments, charge radii, and axial-vector coupling-constant ratios for octet baryons are also calculated with the appropriate center-of-mass correction. The results so obtained are quite comparable to experimental data. © 1990 The American Physical Society.