Here I compare data to the simulation in which I artificially lower the ADC values in the MuDst.

To illustrate what I am changing in the simulation and data, I have created a chart which shows what is done in the BFC and in the jet finder for the various simulation and data sets. Here I will take 2006 as the benchmark, ie, the gains currently in the db should reconstruct the energy deposited in 2006 correctly. (The gains in the database were actually changed from the 2006 version to take into account the high voltage change in the endcap in 2007). For simplicity I will assume an incoming particle energy of 5GeV and a db gain of 100.

Figures 1 and 2 below show the comparison between simulation and data for the jet Pt and Eta spectra. The unlettered figures show the spectra for all jets, figure #a shows the spectra for L2 jets, figure #b shows the spectra for JP jets, and figure #c shows the spectra for untriggered jets.  In each figure the top two pannels show the comparison between the Original Simulation and the unmodified 2009 data, ie, they compare row 2 and 3. The bottom two pannels show the comparison between the simulation with the lower ADC and correction factor in the jet finder to the data set with the correction factor in the jet finder, ie, they compare row 5 and 6. The simulation curves are normalized to the data by the ratio of the integrals of the z-vertex distributions for all jets. The old simulation and new simulation have different normalization factors.

Figure 1: Data / Simulation comparison of jet pt spectrum for all jets. Top two pannels show comparison for original simulation and data. Bottom two pannels show comparison for simulation with lowered ADCs and corrected energy and data with corrected energy.

Figure 1a: Data / Simulation comparison of L2 jet pt spectrum. Top two pannels show comparison for original simulation and data. Bottom two pannels show comparison for simulation with lowered ADCs and corrected energy and data with corrected energy.

Figure 1b: Data / Simulation comparison of JP jet pt spectrum. Top two pannels show comparison for original simulation and data. Bottom two pannels show comparison for simulation with lowered ADCs and corrected energy and data with corrected energy.

Figure 1c: Data / Simulation comparison of untriggered jet pt spectrum. Top two pannels show comparison for original simulation and data. Bottom two pannels show comparison for simulation with lowered ADCs and corrected energy and data with corrected energy.

Figure 2: Data / Simulation comparison of jet eta spectrum for all jets. Top two pannels show comparison for original simulation and data. Bottom two pannels show comparison for simulation with lowered ADCs and corrected energy and data with corrected energy.

Figure 2a: Data / Simulation comparison of L2 jet eta spectrum. Top two pannels show comparison for original simulation and data. Bottom two pannels show comparison for simulation with lowered ADCs and corrected energy and data with corrected energy.

Figure 2b: Data / Simulation comparison of JP jet eta spectrum. Top two pannels show comparison for original simulation and data. Bottom two pannels show comparison for simulation with lowered ADCs and corrected energy and data with corrected energy.

Figure 2c: Data / Simulation comparison of untriggered jet eta spectrum. Top two pannels show comparison for original simulation and data. Bottom two pannels show comparison for simulation with lowered ADCs and corrected energy and data with corrected energy.

To get a better idea of the changes between the original and new simulation as well as between the data with and without the endcap energy correction, I have plotted the two simulation varieties and the two data varieties together for each of the four spectra I look at. The following plots are not scaled to eachother. NOTE: there is a constant offset between the data varieties due to the fact that some of the jobs for the data set with the endcap energy correction did not finish.

 Figure 5: Comparison of L2 jet Pt spectrum for the original simulation and the new simulation (top two pannels) as well as for the data with and without the endcap energy correction (bottom two pannels).

Figure 6: Comparison of JP jet Pt spectrum for the original simulation and the new simulation (top two pannels) as well as for the data with and without the endcap energy correction (bottom two pannels).

Figure 7: Comparison of L2 jet Eta spectrum for the original simulation and the new simulation (top two pannels) as well as for the data with and without the endcap energy correction (bottom two pannels).

Figure 8: Comparison of JP jet Eta spectrum for the original simulation and the new simulation (top two pannels) as well as for the data with and without the endcap energy correction (bottom two pannels).

Figure 9: This is the same as figure 3 except that I have not rebined the x-axis.