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.