D0 global tracking results for t00.87.00

Previous results were for t00.84.00.

Here we present results for t00.87.00. These results are not dramatically different from the previous ones.

Here are results for muons (pT > 10 GeV/c) from Z's in Pythia Z -> mu mu with zero to five background events. These are our MC certification events. (The run with 5 bg events includes a minor bug fix.)

• performance
• CPU time by step
• historical CPU time

Plots also show the found (top) and lost (bottom) muons from Z's. The figures include curves showing the subdetector boundaries. The central horizontal band is the CFT acceptance. The thin bands above and below are the overlap region. The regions above the top V and below the bottom V are the SMT forward acceptance. There are also regions in the upper left and lower right between the CFT overlap and the SMT forward which are not covered. These are the "gaps".

pzmm + 0 bg  muons from Z
pzmm + 5 bg  muons from Z

The numbers used to construct the above plots may be found in the log file.

Here is a plot from Arman Zylberstejn showing the efficiency for matching tracks to EM calorimeter clusters in zee events.

Comments

• No overlap or gap tracking.
• CFT loses efficiency when background events are added.
• Poor fit quality at low pT.
• Memory leaks have been plugged.
• The CPU time is very large when background events are added.

Changes since the last posted results:

• We now count the number (measurements instead of clusters) and keep track of the reduced chi-square (i.e. chi-square per degree of freedom) instead of the raw chi-square.
• Results are now presented graphically.
• We show resolutions and their significances.