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Tevatron Searches (non-SUSY)

Tevatron Searches (non-SUSY). Aspen Winter Conference February 2005 Stefan Gr ü nendahl For the DØ+CDF collaborations. Outline: Tevatron status and luminosity projection DØ+CDF detector status + plans Recently updated searches by channel Dileptons Photons Leptons + missing E T

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Tevatron Searches (non-SUSY)

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  1. Tevatron Searches (non-SUSY) Aspen Winter Conference February 2005 Stefan Grünendahl For the DØ+CDF collaborations Outline: • Tevatron status and luminosity projection • DØ+CDF detector status + plans • Recently updated searches by channel • Dileptons • Photons • Leptons + missing ET • Jets + missing ET • Other channels Stefan Grünendahl Tevatron Searches @ Aspen 2005

  2. Tevatron Luminosity Outlook Tevatron Run I: 130 pb-1 @s=1.8 TeV Run II: @s=1.96 TeV; 0.5 fb -1recorded until 2005-1-10 Current maximum instantaneous luminosity ~100x1030cm-2s-1 • pp collider Z’ reach • 1983: 91 GeV (Z discovery) • 1985: 180 GeV • 1989: 218 GeV (SppS 7.4 pb-1 @s=630 GeV) • 1996: 690 GeV (TEV Run I 110 pb-1 @s=1.8 TeV) • 2004: 815 GeV (TEV Run II 200 pb -1 @s=1.96 TeV) Stefan Grünendahl Tevatron Searches @ Aspen 2005

  3. The Detectors • Both are 4 detectors with central solenoid and silicon vertex tracker • Differences in calorimetry, outer tracker, muon systems • More upgrades for 2005: • CDF: preshower (is installed), EM timing, various trigger improvements • DØ: Layer 0 Silicon, Tracker readout, various trigger improvements calorimeter solenoid tracker DØ Endcap/endplug CDF Stefan Grünendahl Tevatron Searches @ Aspen 2005

  4. cross reference: search vs. signature Signature marked in blue: updated since 6/2004 Stefan Grünendahl Tevatron Searches @ Aspen 2005

  5. spin 0 spin 1 spin 2 Dileptons Stefan Grünendahl Tevatron Searches @ Aspen 2005

  6. dileptons: mass limits DØ: 780(ee,200 pb-1) 680(mm,250 pb-1 ) DØ: 367/355 (mr-mp</>mW, ee only) 650 (ee,200 pb-1 ) 640 (ee,200 pb-1 ) 680 (ee,200 pb-1 ) 575 (ee,200 pb-1 ) 100 DØ: 340/250 (mr-mp</>mW ee only) http://www-cdf.fnal.gov/physics/exotic/r2a/20040916.dilepton_zprime/note_7286.pdf http://www-d0.fnal.gov/Run2Physics/WWW/results/prelim/NP/N22/N22.pdf DØ ee rT,wT http://www-d0.fnal.gov/Run2Physics/WWW/results/prelim/NP/N03/N03.pdf DØ ee Z’ http://www-d0.fnal.gov/Run2Physics/WWW/results/prelim/NP/N20/N20.pdf DØmm Z’ Stefan Grünendahl Tevatron Searches @ Aspen 2005

  7. W’ • CDF, Wen, based on 205 pb-1 • transverse mass fit, signal = right-handed W’ (V+A) • spectrum well described by SM • main syst. uncertainty at very high mass: electron E-scale Stefan Grünendahl Tevatron Searches @ Aspen 2005

  8. Di-photons • Search high-mass gg events for new physics • Backgrounds from • Standard model diphoton • Misidentifications: gj or jj where jet gives a hard π0 • Highest mass event: m(gg) = 405 GeV/c2 Stefan Grünendahl Tevatron Searches @ Aspen 2005

  9. RS Graviton Diphoton LED limit limit on G(1), the first graviton excitation in the Randall-Sundrum ‘warped’ ED model Combined CDF RS graviton result Stefan Grünendahl Tevatron Searches @ Aspen 2005

  10. ee and gg combined • D0 diEM search: best limit on RS-Graviton extension of Z’ analysis to set limit on G(1), the first graviton excitation in the Randall-Sundrum ‘warped’ ED model Highest-mass diEM candidate with invariant mass of 475 GeV and cosθ. of 0.01 (Run 177851, Event 28783974) Stefan Grünendahl Tevatron Searches @ Aspen 2005

  11. Large Extra Dimensions DØ: extract limit from 2d-fitmass vs cos (*) 95 %CL lower limits on MS [TeV]: mm diEM Currently best limits for n>2 Stefan Grünendahl Tevatron Searches @ Aspen 2005

  12. Compositeness • DØ dielectron analysis based on 270 pb-1 • Limits on compositeness scale for various models • LC > 3.6 – 9.1 TeV 3 TeV LL Four-fermion contact interaction interferes with SM D/Y production Black line: Run I limit Stefan Grünendahl Tevatron Searches @ Aspen 2005

  13. Dileptons: tt t(had) signature is a bit more complex than e or m; get track multiplicity right 5 radian/Evis [GeV] from 0.175 down to 0.05, constant above and below 30 Z’ limit Both CDF and DØ have Ztt measurements Stefan Grünendahl Tevatron Searches @ Aspen 2005

  14. Higgs Tevatron Production Current status (from precision EW fits): mH = 114 +69 –45 GeV mH < 260 GeV @ 95% CL Production cross section: ~1 pb for gg H ~0.1 pb for W,Z associated production Decay modes: mH < 140 GeV : bb above 140 GeV: WW* Higgs Decay Stefan Grünendahl Tevatron Searches @ Aspen 2005

  15. Leptons + jets: WHenbb DØ : 6 double b-tag events in 174 pb-1 spectra well described by SM • s(Wbb) < 6.6 pb (for PT(b)>20 GeV, DR(bb) > 0.75) • s(WH) < 9.0-12.2 pb (for MH=105-135 GeV) hep-ex/0410062 Stefan Grünendahl Tevatron Searches @ Aspen 2005

  16. WXenbb, mnbb (X=Higgs, Techni-pion) • 1-tag analysis for 162 pb-1 from CDF: Higgs and Technicolor limit Stefan Grünendahl Tevatron Searches @ Aspen 2005

  17. Higgs in multijets (high tan b) 2 tagged jets • DØ, based on 130 pb-1 • Higgs produced in association with 1 or 2 b • 3 b-tagged jets • limits on ‘down-type’ Higgs in models with more than one doublet (typically MSSM Higgs) 3 tagged jets Stefan Grünendahl Tevatron Searches @ Aspen 2005

  18. Leptoquark limits CDF: 200 pb-1 Leptons + jets, lepton + MET + jets, MET + jets combined Stefan Grünendahl Tevatron Searches @ Aspen 2005

  19. 1st gen.leptoquark • DØ: based on 252 pb-1 • No excess observed • hep-ex/0412029 Stefan Grünendahl Tevatron Searches @ Aspen 2005

  20. Leptons + jets: Technicolor Data, background and signal for theWenchannel • DØ: rT (Wen) + (pTbQ) (Q=b,c), based on 238 pb-1 s < 6.4 pb for m(rT)=200 GeV, m(pT)=105 GeV Stefan Grünendahl Tevatron Searches @ Aspen 2005

  21. Jets + MET • D0 leptoquark search, based on 85 pb-1 • 2 jets, one central, • pT1>60 GeV/c, • pT2>50 GeV/c, • MET > 70 GeV, • 35  < DF(MET,jet)<165 M(LQ) > 109 GeV/c2 QCD fit below 55 GeV CDF: 191 pb-1 M(LQ) > 117 GeV/c2 LQ efficiency Stefan Grünendahl Tevatron Searches @ Aspen 2005

  22. Monojets • D0 monojet search, based on 85 pb-1 (same trigger as LQ search) • one central jet, • pT1>150 GeV/c, • pT2<50 GeV/c, • pTem<10 GeV/c, • pTm<10 GeV/c (no isolated muon), • MET > 150 GeV, • DF(MET,jet)>30 Generator by Lykken and Matchev, based on [2] Result: Stefan Grünendahl Tevatron Searches @ Aspen 2005

  23. Monopoles • CDF search with special TOF trigger in 25 pb-1 • Large magnetic charge heavily ionizing • Accelerated along mag. field special GEANT version • Slow movinglate signals  small (10%) TOF acceptance loss for 900 GeV monopoles • Offline: Drift chamber verification via width of ionization pulse: cut far beyond standard particle range Stefan Grünendahl Tevatron Searches @ Aspen 2005

  24. Long-lived parent of Z0 • CDF dimuons from 163 pb-1 • Parent e.g. b’ with mb’<mt • Search for Z from offset vertex • Low eff * acceptance due to tracking requirement • 5 events observed; consistent with background (1 m-track misreconstructed) Stefan Grünendahl Tevatron Searches @ Aspen 2005

  25. Summary • Current results based on 0.25 fb-1 • More than 0.5 fb-1 on tape • Steady progress, not only due to more data, but also improvements in tools and methods (b –tagging, secondary vertex triggers) • World’s best limits on LQ, Z’, LEDs • Higgs: still an order of magnitude to go • Watch for updates for the rest of the winter conferences • http://www-cdf.fnal.gov/physics/exotic/exotic.html • http://www-d0.fnal.gov/Run2Physics/WWW/results.htm Stefan Grünendahl Tevatron Searches @ Aspen 2005

  26. Stefan Grünendahl Tevatron Searches @ Aspen 2005

  27. Measurement of Z+b/Z+jet • Important check of our understanding of b-yield and systematics for searches (e.g. ZH assoc.production) Taggable jets agree with MC within Jet Energy Scale (JES) uncertainty PT spectrum of B-tagged jets Transverse decay length significance of B-tagged jets result:s(Z+b)/s(Z+jet) = 0.023 ± 0.004(stat)+0.002 -0.003(syst) agrees well with NLO prediction (CTEQ5) of 0.018 ± 0.004 Stefan Grünendahl Tevatron Searches @ Aspen 2005

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