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David Stuart, UCSB. PHENO’04 Searches for new physics at the Tevatron David Stuart, UC Santa Barbara for the CDF & D0 collaborations PHENO’04, April 26, 2004
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David Stuart, UCSB. PHENO’04 (massabetized to avoid any indication of bias) New physics has the same ingredients as bread & butter physics Photons, MET, leptons, jets, b’s The experimental challenge is in defining and understanding the ingredients CDF & D0 have done that as evidenced by the SM measurements Combine the ingredients (with some reference to cookbook) for something new. Similar Combinations: Z or Z’ E T jets top or LQ or SUSY or Higgs
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David Stuart, UCSB. PHENO’04 New physics has the same ingredients as bread & butter physics Photons, MET, leptons, jets, b’s
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons CDF and D0 obtain Z’ Br limits of 50 fb M>750 GeV (with SM couplings)
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David Stuart, UCSB. PHENO’04 Search for high mass di-leptons See talk by M.Karagoz Unel Tuesday at 3pm.
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David Stuart, UCSB. PHENO’04 Search for high mass e + e - and
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David Stuart, UCSB. PHENO’04 Search for high mass e + e - and
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David Stuart, UCSB. PHENO’04 Search for high mass e + e - and = f SM + f KK 2 + f int f = f(M,cos *) = ± M4SM4S 2 M s > 1.22 TeV (+) M s > 1.10 TeV (-)
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David Stuart, UCSB. PHENO’04 Excited electron search (ee )
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David Stuart, UCSB. PHENO’04 Excited electron search (ee ) See talk by H.Gerberich Tuesday at 6pm.
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David Stuart, UCSB. PHENO’04 Excited electron search (ee ) See talk by H.Gerberich Tuesday at 6pm. Expect 3 ± 0.4 Observe 3
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David Stuart, UCSB. PHENO’04 Excited electron search (ee ) See talk by H.Gerberich Tuesday at 6pm.
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David Stuart, UCSB. PHENO’04 Leptoquark Searches (eejj)
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David Stuart, UCSB. PHENO’04 Leptoquark Searches (eejj) Require Scalar Sum of eejj E T > 450 GeV Br 238 GeV/c 2 if Br(LQ eq)=1
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David Stuart, UCSB. PHENO’04 Leptoquark Searches (e jj)
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David Stuart, UCSB. PHENO’04 Leptoquark Searches
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David Stuart, UCSB. PHENO’04 Leptoquark Searches Low Jets + MET mode
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of Large extra dimensions
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of Large extra dimensions
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of Large extra dimensions KK
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of Supersymmetry
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of Supersymmetry
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of Quantum Chromodynamics
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of Quantum Chromodynamics
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of QCD or beam splash or cosmics
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David Stuart, UCSB. PHENO’04 Jets+MET is a classic signature of QCD or beam splash or cosmics Confirm with track jets Calorimeter timing cuts Veto e and mu
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David Stuart, UCSB. PHENO’04 Mono-Jets+MET results KK E T > 150 GeV no 2nd jet with E T >50 GeV E T > 150 GeV > 30º
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David Stuart, UCSB. PHENO’04 Mono-Jets+MET results E T > 150 GeV no 2nd jet with E T >50 GeV E T > 150 GeV > 30º KK Predictions dominated by EWK backgrounds Z + jet W + jet Signal shape is indistinguishable from background.
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David Stuart, UCSB. PHENO’04 Predict 100 ± 10 Stat & Mono-Jets+MET results
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David Stuart, UCSB. PHENO’04 Predict 100 ± 10 Stat & Observe 63 Mono-Jets+MET results
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David Stuart, UCSB. PHENO’04 Predict 100 ± 10 Stat & Observe 63 Jet Energy scale is also a significant systematic on background and signal. Mono-Jets+MET results
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David Stuart, UCSB. PHENO’04 Mono-Jets+MET results Monojet Predict 100 ± 10 Stat & Observe 63 Jet Energy scale is also a significant systematic on background and signal.
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David Stuart, UCSB. PHENO’04 Mono-Jets+MET results Obtain limits of ≈700 GeV Monojet Predict 100 ± 10 Stat & Observe 63 Jet Energy scale is also a significant systematic on background and signal.
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David Stuart, UCSB. PHENO’04 Di-Jets+MET results E T1 > 60 GeV, E T2 > 50 GeV Veto e and 30º < < 165º H T > 275 E T > 175
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David Stuart, UCSB. PHENO’04 Di-Jets+MET results Background predictions dominated by EWK not QCD Z + 2jets W + jet Expect 2.67 ± 0.95 events Observe 4 L = 85/pb E T1 > 60 GeV, E T2 > 50 GeV Veto e and 30º < < 165º H T > 275 E T > 175
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David Stuart, UCSB. PHENO’04 Di-Jets+MET results Background predictions dominated by EWK not QCD Z + 2jets W + jet Expect 2.67 ± 0.95 events Observe 4 L = 85/pb
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David Stuart, UCSB. PHENO’04 Di-Jets+MET results Prediction and acceptance for M 0 = 25 GeV/c 2, A 0 =0, tan = 3, <0, varying M 1/2 L = 85/pb
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David Stuart, UCSB. PHENO’04 Di-Photons+MET In GMSB models, gravitino is LSP
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David Stuart, UCSB. PHENO’04 Di-Photons+MET In GMSB models, gravitino is LSP +E T is a broadly sensitive signature for GMSB
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David Stuart, UCSB. PHENO’04 Di-Photons+MET E T > 13 GeV <1.1 E T > 45 GeV º (E T,j)<170º Calorimeter timing
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David Stuart, UCSB. PHENO’04 Di-Photons+MET E T > 20 GeV <1.1 E T > 40 GeV (E T, )>30º (E T,j)<145º L=185/pb
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David Stuart, UCSB. PHENO’04 Di-Photons+MET Neutralino mass limits ≈ 105 GeV L=185/pb
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David Stuart, UCSB. PHENO’04 Di-leptons+MET In MSUGRA models, neutralino LSP is stable trileptons+E T and di-leptons+E T D0 has searched in both modes.
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David Stuart, UCSB. PHENO’04 Like-sign ± ± +MET Like-sign Predict 0.13 ± 0.06 Observe 1 event Like-sign ± ± p T1 >11 GeV/c p T2 >5 GeV/c (E T,j)<145º º (E T, )<145º E T > 40 GeV M < 80 GeV/c 2
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David Stuart, UCSB. PHENO’04 Di-lepton +MET + Track Select e or ee + E T. Look for a 3rd, isolated track with p T > 3 Expect 1.2 ± 0.4, see 1Expect 0.5 ± 0.2, see 0
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David Stuart, UCSB. PHENO’04 Di-lepton +MET SUSY Limits
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David Stuart, UCSB. PHENO’04 Di-lepton +MET Higgs Limits See talks by P.Jonsson and S.Chuang Tuesday at 2pm. ee Dilepton mass cuts tightened at larger M H
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David Stuart, UCSB. PHENO’04 Di-lepton +MET Higgs Limits See talks by P.Jonsson and S.Chuang Tuesday at 2pm.
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David Stuart, UCSB. PHENO’04 Lepton +MET + bb Higgs Limits See talks by H.Kim and A.Metnitchouk Tuesday at 2pm.
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David Stuart, UCSB. PHENO’04 Lepton +MET + bb Higgs Limits See talks by H.Kim and A.Metnitchouk Tuesday at 2pm.
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David Stuart, UCSB. PHENO’04 bbbb Higgs Search At least 3 tagged jets
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David Stuart, UCSB. PHENO’04 bbbb Higgs Search
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David Stuart, UCSB. PHENO’04 Search for h Limits on BR(h ) < ≈60%
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David Stuart, UCSB. PHENO’04 Search for Doubly Charged Higgs H ++ H -- Predicted e.g., in LR symmetric models W W H ++ Same-sign dilepton signature No events observed
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David Stuart, UCSB. PHENO’04 Summary Many recent preliminary results with twice the Run 1 sample
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David Stuart, UCSB. PHENO’04 Summary Many recent preliminary results with twice the Run 1 sample Cooking up another batch
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