1. Lots of Plots Andrea Bangert Scipp meeting, March 2 nd, 2010

2. Samples W -> ev + Jets MC09 E = 7 TeV W -> ev + 0 partons W -> ev + 1 parton W -> ev + 2 partons W -> ev + 3 partons W -> ev + 4 partons W -> ev + 5 or more partons tt -> lvb jjb MC09 E = 7 TeV 13% of events have negative event weight (MC@NLO) GMSB 1 Supersymmetry with gauge mediated breaking neutralino decays to produce gravitino and prompt photon MC08 E = 10 TeV MET 2 L = 100 inverse pb

3. H T = MET + ΣE T M eff = MET + ΣE T (4 jets) 3

4. ΣE T (jets) W -> ev, ttbar, GMSB L = 100 inverse pb No cuts have been applied W -> ev, ttbar, GMSB L = 100 inverse pb MET > 180 GeV ΣE T (jets) is scalar sum of transverse energy of all jets with p T > 10 GeV No jet-photon overlap removal has been applied MET is due to escape of neutrino from W -> ev or gravitino [I hope that] ΣE T (jets) is not correlated with MET (with exception of MET due to mismeasurement) MET cut selects events with energetic jets

5. ΣE T (jets) in W -> ev sample “No cuts” W -> ev + 0 partons W -> ev + 1 parton W -> ev + 2 partons W -> ev + 3 partons W -> ev + 4 partons W -> ev + 5 or more partons MET > 180 GeV The MET cut selects W -> ev events with many partons in the hard scattering 5

6. p T of leading jet 6 W -> ev, ttbar, GMSB L = 100 inverse pb No cuts have been applied W -> ev, ttbar, GMSB L = 100 inverse pb MET > 180 GeV Before cuts the sample is dominated by W -> ev The MET cut selects events where the leading jet has large p T

7. p T of leading jet in W -> ev events “No cuts” W -> ev + 0 partons W -> ev + 1 parton W -> ev + 2 partons W -> ev + 3 partons W -> ev + 4 partons W -> ev + 5 or more partons MET > 180 GeV 7 [I hope that] p T of leading jet is not correlated with MET The MET cut selects W -> ev events with several partons in the hard scattering

8. N Jets 8 W -> ev, ttbar, GMSB L = 100 inverse pb No cuts have been applied MET > 180 GeV Number of jets per event The cut on MET selects events with more reconstructed jets Is MET primarily from neutrino and gravitino? Is MET correlated with the number of jets in the event?

9. ΣE T (EM) W -> ev, ttbar, GMSB L = 100 inverse pb No cuts have been applied W -> ev, ttbar, GMSB L = 100 inverse pb MET > 180 GeV ΣE T (EM) is the scalar sum of E T of electromagnetic objects in the event It includes electrons and photons with p T > 10 GeV The MET cut selects events with higher ΣE T (EM) Is ΣE T (EM) correlated with MET? 9

10. ΣE T (EM) in W -> ev sample “No cuts” W -> ev + 0 partons W -> ev + 1 parton W -> ev + 2 partons W -> ev + 3 partons W -> ev + 4 partons W -> ev + 5 or more partons MET > 180 GeV ΣE T (EM) is the scalar sum of the electromagnetic objects in the event It includes electrons and photons with p T > 10 GeV The MET cut selects W -> ev events with many partons in the hard scattering 10