Electromagnetic Polarizabilities and Charge Radii of the Nucleons in the Diquark-model

The diquark model is used to calculate the electromagnetic polarizabilities and charge radii of the nucleons for three different potentials. Making the scalar diquark lower in mass introduces a mixing angle θ between the |56〉 and |70〉 states ,which allows an improvement in value of all 6 properties. Generalizing the Gamov-Teller matrix and the magnetic moment operator to the diquark model gives constraints on this mixing. We obtain for the Richardson potential θ = 23.2◦, αp = 7.9 +1.0 −0.9 × 10fm, αn = 7.7 −0.6 × 10fm, βp = 5.4 −0.4 × 10fm, βn = 6.7 −0.7 × 10fm, 〈 r 〉