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Searches for new physics at the Tevatron

Searches for new physics at the Tevatron. David Stuart, UC Santa Barbara for the CDF & D0 collaborations. PHENO’04, April 26, 2004. New physics has the same ingredients as bread & butter physics Photons, MET, leptons, jets, b’s. (massabetized to avoid any indication of bias).

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Searches for new physics at the Tevatron

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  1. Searches for new physicsat the Tevatron David Stuart, UC Santa Barbara for the CDF & D0 collaborations PHENO’04, April 26, 2004

  2. New physics has the same ingredients as bread & butter physics Photons, MET, leptons, jets, b’s (massabetized to avoid any indication of bias) Similar Combinations:  Z or Z’ ETjetstop or LQ or SUSY or Higgs 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.

  3. New physics has the same ingredients as bread & butter physics Photons, MET, leptons, jets, b’s

  4. Search for high mass di-leptons

  5. Search for high mass di-leptons

  6. Search for high mass di-leptons

  7. Search for high mass di-leptons

  8. Search for high mass di-leptons

  9. Search for high mass di-leptons

  10. Search for high mass di-leptons

  11. Search for high mass di-leptons

  12. Search for high mass di-leptons

  13. Search for high mass di-leptons

  14. Search for high mass di-leptons

  15. Search for high mass di-leptons

  16. Search for high mass di-leptons CDF and D0 obtain Z’ sBr limits of 50 fb M>750 GeV (with SM couplings)

  17. Search for high mass di-leptons See talk by M.Karagoz Unel Tuesday at 3pm.

  18. Search for high mass e+e- and gg

  19. Search for high mass e+e- and gg

  20. = fSM + fKKh2 + finth f = f(M,cosq*) h= ± 2 pM4S Search for high mass e+e- and gg Ms > 1.22 TeV (+) Ms > 1.10 TeV (-)

  21. Excited electron search (eegg)

  22. Excited electron search (eegg) See talk by H.Gerberich Tuesday at 6pm.

  23. Excited electron search (eegg) Expect 3 ± 0.4 Observe 3 See talk by H.Gerberich Tuesday at 6pm.

  24. Excited electron search (eegg) See talk by H.Gerberich Tuesday at 6pm.

  25. Leptoquark Searches (eejj)

  26. Leptoquark Searches (eejj) Require Scalar Sum of eejj ET > 450 GeV sBr < 60 fb  M > 238 GeV/c2 if Br(LQeq)=1

  27. Leptoquark Searches (enjj)

  28. Leptoquark Searches

  29. Leptoquark Searches Low b   Jets + MET mode

  30. Jets+MET is a classic signature of <insert currently popular model name here>

  31. Jets+MET is a classic signature of Large extra dimensions

  32. Jets+MET is a classic signature of Large extra dimensions

  33. KK Jets+MET is a classic signature of Large extra dimensions

  34. Jets+MET is a classic signature of Supersymmetry

  35. Jets+MET is a classic signature of Supersymmetry

  36. Jets+MET is a classic signature of Quantum Chromodynamics

  37. Jets+MET is a classic signature of Quantum Chromodynamics

  38. Jets+MET is a classic signature of QCD or beam splash or cosmics

  39. Jets+MET is a classic signature of QCD or beam splash or cosmics Confirm with track jets Calorimeter timing cuts Veto e and mu

  40. ET > 150 GeV no 2nd jet with ET>50 GeV ET > 150 GeV Df > 30º KK Mono-Jets+MET results

  41. ET > 150 GeV no 2nd jet with ET>50 GeV ET > 150 GeV Df > 30º KK Mono-Jets+MET results Predictions dominated by EWK backgrounds Z   + jet W   + jet Signal shape is indistinguishable from background.

  42. Mono-Jets+MET results Predict 100 ± 10 Stat & ds

  43. Mono-Jets+MET results Predict 100 ± 10 Stat & ds Observe 63

  44. Mono-Jets+MET results Predict 100 ± 10 Stat & ds Observe 63 Jet Energy scale is also a significant systematic on background and signal.

  45. Mono-Jets+MET results Monojet Predict 100 ± 10 Stat & ds Observe 63 Jet Energy scale is also a significant systematic on background and signal.

  46. Mono-Jets+MET results Monojet Predict 100 ± 10 Stat & ds Observe 63 Jet Energy scale is also a significant systematic on background and signal. Obtain limits of ≈700 GeV

  47. Di-Jets+MET results ET1 > 60 GeV, ET2 > 50 GeV Veto e and m 30º < Df < 165º HT > 275 ET > 175

  48. L = 85/pb Di-Jets+MET results ET1 > 60 GeV, ET2 > 50 GeV Veto e and m 30º < Df < 165º HT > 275 ET > 175 Background predictions dominated by EWK not QCD Z   + 2jets W   + jet Expect 2.67 ± 0.95 events Observe 4

  49. L = 85/pb Di-Jets+MET results Background predictions dominated by EWK not QCD Z   + 2jets W   + jet Expect 2.67 ± 0.95 events Observe 4

  50. Di-Jets+MET results L = 85/pb Prediction and acceptance for M0 = 25 GeV/c2, A0=0, tan b = 3, m<0, varying M1/2

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