Weak electric and magnetic form factors for semileptonic baryon decays are calculated in a relativistic quark model based on the Dirac equation with the independent-quark confining potential of the formVq(r)=1/2(1+γ0)(a2r+V0). The values obtained for (g2/g1) are not very much different from the nonrelativistic results of Donoghue and Holstein. The values of (g1/f1) extracted from our model calculations of (f2/f1) in the Cabibbo limit compare well with the experimental values. The values of (f2/f1) for various semileptonic transitions are also estimated incorporating phenomenologically the effect of nonzerog2 in the ratio (g1/f1). It is found that the SU(3)-symmetry breaking does not generate significant departures in (f2/f1) values from the corresponding Cabibbo predictions.
Volume 95, 2021
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