Run Dependence and requiring hadronic triggers
In the forgoing studies we did not demand the Had trigger bit. But these plots show that had trigger is typically on for background subtracted charm in excess of 98% of the time.
The run period does have a slight influence on the average charm momentum. There is an ~1% increase in momentum for mcs6 (run # > 9421). We hope this was connected with changes in the beam energy.