Ay. Ignatiev et al., THE SEARCH FOR THE DECAY OF Z-BOSON INTO 2 PHOTONS AS A TEST OF BOSE STATISTICS, Modern physics letters A, 11(11), 1996, pp. 871-876
We suggest that Bose statistics for photons can be tested by looking f
or decays of spin-1 bosons into two photons. The experimental upper li
mit on the decay Z --> gamma gamma is used to establish for the first
time the quantitative measure of the validity of Bose symmetry for pho
tons.