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| - | This data was made by fitting a gaussian to invariant mass histograms in various cases and pile up ranges for mass = 425 GeV. The trend shows as pile up and |h| increases, so does mass peak width. The first case is all events. The second is events in which both electrons go into the barrel. Then when one electron goes into the barrel and one into the endcap, and finally when both go into the endcap. The dielectron data showed that the resolution in the barrel fit a constant and did not significantly change due to pile up. This is consistant here as events with both electrons in the barrel do appear to reasonably fit a constant across different pile up simulations. When one electron is in the endcap then the pile up has a much larger effect because it appears that the endcap is effected by pile up to a much greater extent. Where as when both electrons are in the barrel the mass peak becomes difficult to fit. It is reasonable to say that peak width and thereby resolution is worse, however it is difficult to quantify. | + | |
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| - | This data is taken by the same gaussian technique only applied to the mass = 2 TeV simulation. This data follows largely the same trends as the mass = 425 GeV simulation. Because the electrons have higher energies on average than the lower mass simulation they have a smaller percentage of their energy present in pile up particles and exhibit a higher average resolution. In this simulation the case with both electrons going into the endcap should be ignored, there are only ~400 events total which do this and that is not statistically strong enough to make a good fit. | + | |
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