s~ s -> d4 d4~ -> d d~ z z 2 ! QCD 4 ! QED 0 ! XTR s s~ -> d4 d4~ -> d d~ z z 2 ! QCD 4 ! QED 0 ! XTR c~ c -> d4 d4~ -> d d~ z z 2 ! QCD 4 ! QED 0 ! XTR c c~ -> d4 d4~ -> d d~ z z 2 ! QCD 4 ! QED 0 ! XTR g g -> d4 d4~ -> d d~ z z 2 ! QCD 4 ! QED 0 ! XTR