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Sue and Amber are searching for SUSY in the channel 1 electron, jets, and MET. Brett, and FSU student, will do the muon channel. They start with a preliminary sample with an electron above 20, a jet above 40, another above 30, and met above 40 GeV and delta_phi between the leading jet and the MET < 3.0 164 events pass these cuts. They calculate the top background and the WW background from Monte Carlo. They use the method from the leptoquark analysis for the QCD background. They W + jets background is then the difference between the observed number of events and these backgrounds. They find they must multiply the vecbos cross section by 0.4 to get this to be the predicted number. There was some argument about whether they were adding the vecbos W+1 jet, vecbos W+2 jets, and vecbos W+3 jets cross sections correctly. They used the thus-normalized prediction from vecbos to model their W's in further optimization. Of the 164 events, about 80% are W's. They studied many variables using the optimization method of Jim Linneman to get the final cuts. They found Ht>280 was the best cut. They do not require the electron to have a track, because this gives them a big gain in acceptance. In order to beat down the larger QCD backgrounds in the trackless channel, they then require 2 additional cuts. They require the delta_phi between the met and the 3 leading jets, and the met and the electron be greater than 3.0. They require the missing et signifigance, calculated (met/(.9+0.029 scalar et)) be less than 2. 29 events pass these final requirements, with a similar number predicted for background. Their limits in the m0-m1/2 plane look similar to, but slightly stronger than the 2 electron analysis. However, they use NLO cross section, while the 2 electron uses LO. they plan to combined with the 2 electorn
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talk on susy with photons
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