Top Pair Production Cross Section with Tight SecVtx Tags using 318 pb-1      
 Q&A*



People
 Salvatore Rappoccio
Daniel Sherman Joao Guimaraes da CostaAndy Foland Melissa Franklin 
Harvard University

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General Q&A about the analysis.

 Requests from All about the NJet plots
Move the Ht cut label in the number of jet plots so that doesnot overlap the data points.
The 
Posted on April 11 by JG

 Requests from All about the kinematic plots
For all plots kinematic plots: Make legend bigger, add CDF II Preliminary and luminosity. Vertex transverse momentum plot extend the x-axis. Other plots zoom-in into the plot (reduce x-axis).
Simplify event display. No run and event number.
The 
Posted on April 11 by JG

 Requests from Robin about event displays
Simplify wording in event display. No run and event number. (Other think it is OK).
We can simplify the event displays but we would like to bless as well the event displays with the event information.
Posted on April 11 by JG


Optimization

Question from Robin/Daniel J.
You should include the systematic error on the backgrounds in the optimization.
We re-evaluated all the optimization curves including the background error. When we do this we see some small dependence on the input ttbar cross section. We examine the extrema of the allowed theoretical range, 5-9 pb. We did not see any significant deviation from Ht > 200 and Mt > 20 being the optimal points, and so we use Ht > 200 and Mt > 20 as our optimal points.


Optimization of Ht Cut for xs = 5 pb


Optimization of Ht Cut for xs = 9 pb


Optimization of Mt Cut for xs = 5 pb


Optimization of Mt Cut for xs = 9 pb