Upload
sheila-morrison
View
29
Download
0
Embed Size (px)
DESCRIPTION
PMCS: Z->ee channel. Conclusion. Peter Renkel and Bob Kehoe from SMU. Want to tune pmcs for the top group. What was done. Etmiss looked horrible. First concern. Go to the channel with no real missing energy – Z->ee Also, some problems with jet pts. - PowerPoint PPT Presentation
Citation preview
PMCS: Z->ee channel. Conclusion.
Peter Renkel and Bob Kehoefrom SMU
Want to tune pmcs for the top group.What was done.
● Etmiss looked horrible. First concern. Go to the channel with no real missing energy – Z->ee
● Also, some problems with jet pts.
● Angle distributions for the jets and leptons looked fine!
● Etmiss:
– Fixed a bug: before fixing no correction for Etmiss due to the jets.
– Implemented jet efficiency: before fixing efficiency of 100% for the jets was assumed.
– Took into account soft recoil by degrading it and smearing.
● Jets and electrons spectrum was fixed because of jet efficiency.
Cuts.
● Require at least two jets with pt>20GeV and abs(eta)<2.5
● Require exactly two electrons with pt>15GeV and abs(eta_detector)<1.1 or 1.5<abs(eta_detector)<2.5
1. Nothing 2. Bug fixed
Etmiss
Etmiss
3. Jet Efficiency 4. Combined method (+recoil)
Etmiss
Etmiss
pt pt
Leading jet pt Next to leading jet pt
pt pt
Leading electron pt Next to leading electron pt
Plans.
● Get suggestions. Does this look fine?● Generate other bgs and check them. Must be fine,
since generated missing energy is higher for other bgs. We hope (don't forget about Merfi's low:).
● Be ready for the next week to give bgs to Jeff for using them in the analysis.