1. Update on Pileup Ken Johns, Venkat Kaushik, Xiaowen Lei, Mario Aletti (U. Arizona)

2. Electron + Jets Channel (tT) N=0 1360 =5 r1430 and 15.6.12.3 Trigger0.219+0.00050.215+0.001 Lepton0.199+0.00050.196+0.001 MET0.181+0.00050.179+0.001 3 Jet0.110+0.00040.115+0.001 4 Jet0.080+0.00030.083+0.001 B-jet0.080+0.00030.083+0.001 Jet cleaning0.080+0.00030.083+0.001 PV0.079+0.00030.082+0.001 Trigger0.079+0.00030.082+0.001

3. Muon + Jets Channel (tT) N=0 =5 r1430 and 15.6.12.3 Trigger0.263+0.00050.259+0.001 Lepton0.243+0.00050.241+0.001 MET0.223+0.00050.221+0.001 3 Jet0.136+0.00040.142+0.001 4 Jet0.099+0.00030.102+0.001 B-jet0.099+0.00030.102+0.001 Jet cleaning0.099+0.00030.102+0.001 PV0.084+0.00030.087+0.001 Trigger0.084+0.00030.087+0.001

4. W (e) + 4 Jets Channel N=0 r1430 and 15.6.12.3 =5 r1430 and 15.6.12.3 Trigger0.456+0.0040.451+0.004 Lepton0.456+0.0040.451+0.004 MET0.381+0.0040.377+0.004 3 Jet0.152+0.0030.169+0.003 4 Jet0.008+0.0010.009+0.001 B-jet0.008+0.0010.009+0.001 Jet cleaning0.008+0.0010.009+0.001 PV0.008+0.0010.009+0.001 Trigger0.008+0.0010.009+0.001

5. W (mu) + 4 Jets Channel N=0 r1430 and 15.6.12.3 =5 r1430 and 15.6.12.3 Trigger0.608+0.0040.604+0.004 Lepton0.608+0.0040.604+0.004 MET0.522+0.0040.523+0.004 3 Jet0.216+0.0040.240+0.004 4 Jet0.014+0.001 B-jet0.014+0.001 Jet cleaning0.014+0.001 PV0.012+0.0010.013+0.001 Trigger0.012+0.0010.013+0.001

6. Other Studies in Progress  Process remaining W+jet pileup samples for completeness  Effect of JES on MET  Investigation of electron definition mismatch in MET (top)  Investigation of MET + variable in reducing QCD background