Deuteron elastic electromagnetic form factor in relativistic harmonic oscillator model

Recent e-d elastic scattering experiments show that the deuteron elastic electromagnetic form factor behaves like (Q2)-5 at large momentum transfers. This fact suggests that we can observe a possible six-quark configuration besides the ordinary proton-neutron bound state configuration in the deuteron state, because the power 5 is considered to come directly from the degree of freedom of the internal orbital motion in the relativistic harmonic oscilator model, for the same reason as the pion form factor of the simple pole type and the nucleon form factor of the dipole type. Using the theoretical formula of the deuteron form factor given by the model, we analyze the experimental data and then determine the probability of finding the six-quark configuration. Finally, a simple potential model is introduced to connect the probability with possible dibaryon resonance states. Consistent numerical relations are obtained between the deuteron form factor and the dibaryon resonances. (author)