This study takes a closer look at the dijet false asymmetries.

In my previous dijet study I found large false asymmetry values (~1 sigma from 0) in several invariant mass bins in the various dijet topologies. The false asymmetries and their errors are calculated as described here. In this study, I want to look at how the false asymmetries change when I use two different sets of relative luminosity values and the behavior of the false asymmetries and their errors in the Reversed Full Field and Full Field parts of the run seperately.

To look at these different cases I have created a master spreadsheet. The first six tabs of this spreadsheet show numerical values. Each tab lists the value of the false asymmetry, the number of entries and the error in each invariant mass bin for the four false asymmetry types and the five dijet topologies. The first tab is for the RFF part of the run using the relative luminosity values with no bin crossing cut, the second tab is for the FF part of the run using the same relative luminosity values as the first tab. The third and fourth tabs are for the RFF and FF parts of the run using the relative luminosity values with a bx cut. The fifth tab shows the full run (RFF+FF) using the relative luminosity values without the bx cut and the sixth tab shows the full run using the relative luminosity values with the bx cut. The last 5 tabs show plots. Each tab is one of the five dijet topologies. Each tab contains 16 plots. The four rows are for the four different false asymmetries. The first column shows the values of the false asymmetries for the no bx cut RFF, no bx cut FF, bx cut RFF, and bx cut FF divisions in each invariant mass bin. The second column shows the errors in each bin. The third column shows the false asymmetries for the full run for both the relative luminosity samples. The fourth column shows the errors. 

The first issue I wanted to investigate was how the different relative luminosity values affected the false asymmetries. I am using the two relative luminosity files found on Joe Seele's blog page. One file includes all 120 bin crossings and the other has several bin crossings excluded. The excluded bxings are 20, 60, 78-80, 31-39, and 111-119. Further details of Joe's analysis can be found in his blog posts. To see the effect of the different relative luminosity files, I ran my analysis twice, once with the no bx cut list and again with the bx cut list. When I ran with the bx cut relative luminosity list, I excluded the bx crossings missing in the list from my analysis.

The best way to see the effect the different sets have on the false asymmetries is to look at the third and fourth columns of the 'plot pages' in my spread sheet. The only difference between the two curves in these plots is the relative luminosity list used. The data points all show very good agreement between the two lists with the most significant differences comming at the highest invariant mass bins. The false asymmetries found using either list are all in agreement within statistical errors.

Conclusion: The two relative luminosity lists give almost identical false asymmetry results within error. More digging into Joe's blog page to determine why he made certain cuts will be needed to chose the more desirable relative luminosity set.

The second issue I wanted to investigate was how the false asymmetries behaved in the RFF and FF parts of the run seperately.