This is the usual (and well understood) error in datamon arising from best-guesses of correlations between the triggers. It is particularly tricky in this experiment since the correlation between the dE and E plane triggers can change significantly as a function of the kinematics.
------------ THaNormAna Scaler Summary ----------------· Time of run 0.23 min· Triggers: 1 = 4402747 2 = 7946585 3 = 362104 4 = 10221 5 = 10202 Accepted triggers: 16083· Accepted triggers by helicity: (-) = 7886 (+) = 7892 Charge Monitors (Micro Coulombs) Upstream BCM gain x1 47.99 x3 47.86 x10 85.19 Downstream BCM gain x1 48.28 x3 48.33 x10 48.46 ------------ THaNormAna Trigger Summary ----------------· Trigger Prescale Num evt Num in Livetime --- Factor CODA file Scalers 1 32000 127 4402747 0.742 2 58000 131 7946585 0.769 3 2700 131 362104 0.785 4 76 138 10221 0.825 5 1 10011 10202 0.789 6 1 15983 16424 0.783 7 2200 133 299193 0.786 8 100 146 14279 0.822 9 1 5 0 0.000 10 1 0 0 0.000 11 1 0 0 0.000 12 1 0 0 0.000