A PHYSICAL CONSEQUENCE OF THE GAUGE INVARIANCE IN THE PROCESS π0→γγ
- Received Date: 1900-01-01
- Accepted Date: 1900-01-01
- Available Online: 1985-08-05
Abstract: The contributions from the valence quark state and the higher Fock states of hadronic wavefunctions in the process π0→γγ are analyzed in this paper. An important result, the contribution to the amplitude of the process π0→γγ from the valence Fock state is one half of the total amplitude, is proved by using a gauge invariant identity of the divergence of the axial vector current. From this inference we obtain a constraint on the valence Fock state wavefunction, which is very useful for useful for phenomenological analysis in exclusive processes.