  By virtue of SU(3) flavor symmetry, the effective interaction Hamiltonian is
derived in tensor form. The strong and electromagnetic breaking effects are
taken into account in a form of "spurion" octet, so that the systematical
parametrization of all baryon pair final states is realized on basis of the
flavor-singlet principle. As an application, the relative phase between the
strong and electromagnetic amplitudes is studied in the light of this scenario.
In analyzing the data taken at J/$\psi$ resonance region in $e^+e^-$ collider,
the details of experimental effects, such as energy spread and initial state
radiative correction are taken into consideration in order to obtain the
correct results.
