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This plot takes the yield from the fit of the histogram. For this plot yield is calculated as the number of events under the measured mass peak devided by the number of events in the histogram. The arching behavior could be a sum of several different trends. I hypothese that when the mass peak widens that it more easily catches the edges of the peak and includes more events causing the yield to increase as a function of pile up. The more obvious effect being that as pile up increases there is a larger number of misreconstuctions that calculate the invariant mass at close to zero, thus causing yield to decrease as a function of pile up.
This shows the same technique used for the mass = 2000 GeV simulation. There is a slight trend upward in the data. Pile up = 40 shows a downward behavior as well that is unique from the others. EE_EE shows a lower resolution but again cannot be taken as meaningful data.
This yield was calculated in a different way. This is the number of events under the measured gaussian peak devided by the total number of events for the simulation, 10000. The trend is downward, as pile up increases, fewer events are reconstructed into the appropriate mass peak. EE_EE, both elecrons in the endcap, shows little change across pile up, however very few events fall into that bin without the presence of pile up.
ET USED INSTEAD OF ENERGY
The yield for Z' mass = 425 GeV. The two superclusters have been found by taking the highest ET and not the highest energy as above.
For mass = 2000 yield calculated over 10000 there appears to be no change in the yield as a function of pile up. This behavior is quite different from the mass = 425 simulation. I am still working on why this is so different. Because the denominator is a constant the numerator must be as well for calculating the same number. As the peak widens there is no change in the number of events which are included in the calculated peak.
ET USED INSTEAD OF ENERGY
The yield for Z' mass = 2000 GeV. The two superclusters have been found by taking the highest ET and not the highest energy as above.