Run 15 BEMC Calibration - October Update
In the slides below I show some followups to questions from last week's meeting, as well as some new calculations of systematics for the calibration (Note: not all systematic uncertainty calculations have been finished)
One of the things I cover in the slides are the plots I made to help answer a question that came up in the last meeting regarding the comparison of gains with and without TOF cuts.
In addition to what I show in the slides, I also have attached the file with the plots for all the rings
The file shows three plots for each ring comparing E/p with and without TOF cuts.
The top plot shows the mean E/p vs p distribution, on this plot are a few lines. The blue lines show the placement of the momentum cut. The black and red dashed lines show the mean E/p for the ring over the selected momentum range with and without the TOF cut, respectively. Similarly, there are solid black and red lines, these show the weighted average of the bins within the blue bars (approximate percentage of the total of the 6 bins between the blue bars are as follows, starting with the 2 GeV bin: 38%, 24%, 16%, 10%, 7%, 5%. First bins dominate the sample).
The two plots below the E/p vs p plot show the E/p distribution for the ring with and without the TOF cut. These plots are where the black and red average lines from the previous plot are calculated, and also where the final E/p is taken from for calculating the final gains.
Version 2 of the slides shows the latest calculations for the systematics, as well as an updated calculation for the momentum cut systematic. As well as calculations of the systematics using the full data sample.
Version 3 includes some updates on the minbias sample
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