ATLAS SUSY meeting - MET signatures subgroup, 24 Sept’ TeV Alan Barr, Claire Gwenlan (Oxford) - initial look at the two- and three-jets+MET (CSC-style) analyses with 10pb -1 - Outline  MC samples/selection cuts  initial results  summary/future work

Jets+MET at 10TeV with 10pb Sept'08 1 MC samples/selection cuts Cuts: [two-/three-jet+MET 10TeV, with 10pb -1 ] look at “loose”, “medium” and “tight” phase space cuts (see below) –[as proposed by S. Caron: [other cuts as in CSC note 5 (for now; see backups for full list) ] tightmediumloose two-jetpT > 200,80 GeVpT > 180,50 GeVpT > 120,40 GeV three-jetpT > 100,50,50 GeVpT > 100,40,40 GeVpT > 80,40,40 GeV MC samples: v12 fullsim samples, as used in CSC note 5 (full list in backups) these samples generated at 14TeV -> reweight PDFs to 10TeV [as described: (C. Gwenlan) ] MET>80 GeV in all cases

Jets+MET at 10TeV with 10pb Sept'08 2 Results (i): M eff two-jet+MET [all cuts incl. J70_XE70 trigger] S/sqrt(B) [max.] S/sqrt(S+B) [max.] loose2112 medium1910 tight189 10TeV, 10pb -1

Jets+MET at 10TeV with 10pb Sept'08 3 Results (ii): M eff S/sqrt(B) [max.] S/sqrt(S+B) [max.] loose2613 medium2612 tight TeV, 10pb -1 three-jet+MET [all cuts incl. J70_XE70 trigger]

Jets+MET at 10TeV with 10pb Sept'08 4 Results (iii): M T2

Jets+MET at 10TeV with 10pb Sept'08 5 Results (iv): M T2

Jets+MET at 10TeV with 10pb Sept'08 6 summary/future work in principle, light SUSY discoverable with 10pb-1 at 10TeV … IF enough statistics (and sufficient understadning of the detector!) to determine backgrounds to resonable precision Next steps: - background determinations - trigger studies

Jets+MET at 10TeV with 10pb Sept'08 7 Extras

Jets+MET at 10TeV with 10pb Sept'08 8 MC samples (backgrounds) QCD J4trig1_misal1_mc pythia_J4_Nj2_FMET100.recon.AOD.v QCD J5trig1_misal1_mc pythia_J5_Nj2_FMET100.recon.AOD.v QCD J6trig1_misal1_mc pythia_J6_Nj2_FMET100.recon.AOD.v QCD J7trig1_misal1_mc pythia_J7_Nj2_FMET100.recon.AOD.v QCD J8trig1_misal1_mc pythia_J8_Nj2_FMET100.recon.AOD.v Zeetrig1_misal1_mc pythia_Zee_qg_ckin80_Nj2.recon.AOD.v Zmumutrig1_misal1_mc pythia_Zmumu_qg_ckin80_Nj2.recon.AOD.v Ztautautrig1_misal1_mc pythia_Ztautau_qg_ckin80_Nj2.recon.AOD.v Znunutrig1_misal1_mc pythia_Znunu_qg_ckin80_Nj2.recon.AOD.v Wenutrig1_misal1_mc pythia_Wenu_qg_ckin80_Nj2.recon.AOD.v Wmunutrig1_misal1_mc pythia_Wmunu_qg_ckin80_Nj2.merge.AOD.v Wtaunutrig1_misal1_mc pythia_Wtaunu_qg_ckin80_Nj2.merge.AOD.v TTbartrig1_misal1_mc TTbar_FullHad_McAtNlo_Jimmy.recon.AOD.v T1trig1_misal1_mc T1_McAtNlo_Jimmy.recon.AOD.v WWtrig1_misal1_mc WW_Herwig.recon.AOD.v ZZtrig1_misal1_mc ZZ_Herwig.recon.AOD.v WZtrig1_misal1_mc WZ_Herwig.recon.AOD.v

Jets+MET at 10TeV with 10pb Sept'08 9 MC samples (signal) SU1trig1_misal1_csc SU1_jimmy.susy.recon.AOD.v SU2trig1_misal1_csc SU2_jimmy.susy.recon.AOD.v SU3trig1_misal1_csc SU3_jimmy.susy.recon.AOD.v SU4trig1_misal1_csc SU4_jimmy.susy.recon.AOD.v SU6trig1_misal1_csc SU6_jimmy.susy.recon.AOD.v SU8.1trig1_misal1_csc SU81_jimmy.susy.recon.AOD.v

Jets+MET at 10TeV with 10pb Sept'08 10 hadronic cross section given by: for a particular kinematic configuration with s, t, u, should just need to change the probability that incoming partons *had* that configuration i.e. just a PDF re-weight Reminder: PDF reweighting Re-weight MC to 10 TeV using: x i : x of parton i at 14TeV; x i ’: x of parton i at 10TeV proton PDFs hard subprocess cross section p T Jet,1,2 >150,100 GeV

Jets+MET at 10TeV with 10pb Sept'08 11 selection cuts two-jetthree-jet Cut1p T jet1 Cut2p T jet2 p T jet3 Cut3MET>80GeV Cut4MET/M eff >0.3MET/M eff >0.25 Cut5dphi(jet1-MET)>0.2 Cut6dphi(jet2-MET)>0.2 Cut7dphi(jet3-MET)>0.2 Cut8no isolated leptons as in CSC5 (for now) Cuts: [two-/three-jet+MET 10TeV, 10pb -1 ] “loose”, “medium” or “tight” (as given below) tightmediumloose two-jetpT > 200,80 GeVpT > 180,50 GeVpT > 120,40 GeV three-jetpT > 100,50,50 GeVpT > 100,40,40 GeVpT > 80,40,40 GeV

Jets+MET at 10TeV with 10pb Sept'08 12 Results (extras): Two-Jet+MET [M eff analysis] various SUX signal MC compared to total SM background

Jets+MET at 10TeV with 10pb Sept'08 13 Results (extras): Three-Jet+MET [M eff analysis] various SUX signal MC compared to total SM background

Jets+MET at 10TeV with 10pb Sept'08 14 Results (i): M eff 10TeV, 10pb -1 two-jet+MET [all cuts except trigger]

Jets+MET at 10TeV with 10pb Sept'08 15 Results (ii): M eff 10TeV, 10pb -1 three-jet+MET [all cuts except trigger]

Jets+MET at 10TeV with 10pb Sept'08 16 Results (iii): M T2 two-jet+MET [jet-pT, lepton veto cuts only] 10TeV, 10pb -1

Jets+MET at 10TeV with 10pb Sept'08 17 Results (iv): M T2 10TeV, 10pb -1 two-jet+MET [jet-pT, lepton-veto, MET cuts only]

Jets+MET at 10TeV with 10pb Sept'08 18 Results (v): M T2 10TeV, 10pb -1 two-jet+MET [jet-pT, lepton-veto, MET cuts and J70_XE70 trigger]

Jets+MET at 10TeV with 10pb Sept'08 19 Results (vi): M T2 10TeV, 10pb -1 three-jet+MET [jet-pT, and lepton-veto cuts only]

Jets+MET at 10TeV with 10pb Sept'08 20 Results (vii): M T2 10TeV, 10pb -1 three-jet+MET [jet-pT, lepton-veto, MET cuts only]

Jets+MET at 10TeV with 10pb Sept'08 21 Results (viii): M T2 10TeV, 10pb -1 three-jet+MET [jet-pT, lepton-veto, MET cuts and J70_XE70 trigger]