  We have developed an event mixing technique to observe Bose-Einstein
correlations (BEC) between two identical neutral pions produced in
photo-induced reactions in the non-perturbative QCD energy region. It is found
that the missing-mass consistency cut and the pion-energy cut are essential for
the event mixing method to effectively extract BEC observables. A Monte Carlo
(MC) simulation is used to validate these constraints and confirms the
efficiency of this method. Our work paves the way for similar BEC studies at
lower energies where the multiplicity of emitted bosons is limited.
