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Striking Results from the Tevatron

Striking Results from the Tevatron. Kirsten Tollefson Michigan State University LP07. 1 fb -1. CDF. SM limit. 1. A year ago…. “Hot Topics”, ICHEP ‘06 D. Glenzinski. Design. 1500 pb -1. 2007. 750 pb -1. Base. 2005. 2004. 2006. 2003. Fiscal Years. Tevatron Performance.

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Striking Results from the Tevatron

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  1. Striking Results from the Tevatron Kirsten Tollefson Michigan State University LP07

  2. 1 fb-1 CDF SM limit 1 A year ago… “Hot Topics”, ICHEP ‘06 D. Glenzinski K. Tollefson, LP07

  3. Design 1500 pb-1 2007 750 pb-1 Base 2005 2004 2006 2003 Fiscal Years Tevatron Performance • Many improvements over last year • More pbars, more reliable • Monthly int. lum. increased 25  45 pb-1 • Peak lum. increased 180e30  286e30 cm-2 s-1 • Expect ~6-7 fb-1 by Oct. ‘09 Thanks to the Accelerator Division! K. Tollefson, LP07

  4. In the last year… • Added >1 fb-1 of data to many analyses • World’s best W mass, W width and Top mass • Precision cross section measurements • Evidence for Single Top production • Better understanding of Top Properties • Discovery of Bs mixing • First observation of b and b • Prolific number of papers ~1.5 pubs/week K. Tollefson, LP07

  5. Tevatron Goals for Run II • Precision measurements of • Top mass • W boson mass and width • Bs oscillation frequency ms • Exploration of • B baryons • Dibosons (WW, WZ, ZZ) • Top quarks • Find Higgs and BSM physics K. Tollefson, LP07

  6. Tevatron Goals for Run II • Precision measurements of • Top mass • W boson mass • Bs oscillation frequency ms • Exploration of • B baryons • Dibosons (WW, WZ, ZZ) • Top quarks • Find Higgs and BSM physics K. Tollefson, LP07

  7. 1 fb-1 Top Mass D0 expects same precision See S01-1 talk for details K. Tollefson, LP07

  8. W Mass and Width See S01-2 talk for details K. Tollefson, LP07

  9. Mw vs Mtop MH < 182 GeV (including LEP2 MH>114 GeV) See S01-2 and S01-3 talks for details K. Tollefson, LP07

  10. Bs Mixing and ms ms ~ Vts Improvements: • Better detector: Layer 0 silicon • Track-by-track IP resolution uncertainty • Same side flavor tagging (SST) • Additional channel: hadronic decays • Better boost description K. Tollefson, LP07

  11. -logL 3.1s Dms Bs Mixing and ms Many analysis improvements! See S06-18 talk for details Channels: mfp, efp, mK*K, pfp 27.3 pb-1 2.4 fb-1 Dms (ps-1) ms =17.77 ± 0.12 ps-1 PRL 97, 242003 2006 ms =18.6 ± 0.8 ps-1 K. Tollefson, LP07

  12. Tevatron Goals for Run II • Precision measurements of • Top mass • W boson mass • Bs oscillation frequency ms • Exploration of • B baryons • Dibosons (WW, WZ, ZZ) • Top quarks • Find Higgs and BSM physics K. Tollefson, LP07

  13. B baryon Discoveries b b bc bc b See Tuesday’s sessions S06-S08 K. Tollefson, LP07

  14. Diboson Results See S01-2 talk for details K. Tollefson, LP07

  15. S01-1 talk for details Top Quarks Properties: • Mass • Width • Charge • Lifetime Production: • Mechanism (qq vs. gg) • EWK (single top) • Resonances • Cross Section • Branching Ratios Decay: • W Helicity • FCNC K. Tollefson, LP07

  16. Top Cross Section and R or q Assuming 3 generations or q K. Tollefson, LP07

  17. Tevatron Goals for Run II • Precision measurements of • Top mass • W boson mass • Bs oscillation frequency ms • Exploration of • B baryons • Dibosons (WW, WZ, ZZ) • Top quarks • Find Higgs and BSM physics K. Tollefson, LP07

  18. Searches • SM Higgs limit • Indirect • Charm mixing • Bs (FCNC) • Direct • t Zc (FCNC) • Mtt • SUSY Chargino and Neutralino • Global Search - Vista/Sleuth More Tevatron search results in S03 K. Tollefson, LP07

  19. Tevatron: A Precision Machine Plus a Road to Higgs and Beyond  Total Inelastic Bs–Bs Oscillation, bDiscovery + Precision Meas. jets (qq, qg, gg) mb - - - bb observed b - MW ~0.05% W Z Mtop ~1.2% nb - - tt Observed WZ, Evidence for ZZ and Single Top WZ, Single Top, ZZ pb - Higgs WH,ZH MHiggs < ? GeV at 95% CL Low Mass SUSY fb - - - - 100 120 140 160 180 200 K. Tollefson, LP07 Higgs Mass [GeV/c2]

  20. SM limit 1 SM Higgs Limits 2 fb-1 limits coming soon! See S03-8 talk for details K. Tollefson, LP07

  21. Searches • SM Higgs limit • Indirect • Charm mixing • Bs (FCNC) • Direct • t Zc (FCNC) • Mtt • SUSY Chargino and Neutralino • Global Search - Vista/Sleuth K. Tollefson, LP07

  22. Charm Mixing • Results from BaBar and Belle previous 2 talks • CDF looked at • Measure time-dependent ratio First time at Tevatron Wrong sign Right sign 1 fb-1 1 fb-1 Cabibbo favored decay Doubly Cabibbo suppressed decay or mixing K. Tollefson, LP07

  23. Charm Mixing 1 fb-1 1 fb-1 No mixing No mixing probability is 0.13% (3.2 ) K. Tollefson, LP07

  24. See S03-9 talk Bs • In SM Bs is suppressed (need FCNC) • SM predicts • SUSY can enhance BR 100 • No excess seen in 2 fb-1 New BR(Bsmm)<5.810-8 @95%C.L. BR(Bsmm)<9.310-8 @95%C.L. K. Tollefson, LP07

  25. K. Tollefson, LP07 August 13, 2007 K. Tollefson, LP07

  26. Finding New Physics • Indirect • Charm mixing • Bs (FCNC) • Direct • t Zc (FCNC) • Mtt • SUSY Chargino and Neutralino • Global Search - Vista/Sleuth K. Tollefson, LP07

  27. Top FCNC(Flavor Changing Neutral Currents) • In SM BR(tZq) = O(10–14) • BSM predict up to O(10–2) • LEP limit BR(tZq)<13.7% • CDF sees no excess in 1 fb-1 K. Tollefson, LP07

  28. SM tt SM tt Mtt • Search for Xtt (model independent) • Narrow resonance x = 0.012Mx Mx=450 GeV Mx=650 GeV Mtt (GeV) Mtt (GeV) K. Tollefson, LP07

  29. Mtt and Z´ Technicolor leptophobic Z´ Expected MZ´ > 740 GeV Observed MZ´ > 680 GeV MZ´ > 720 GeV L = 0.9 fb-1 K. Tollefson, LP07

  30. Chargino and Neutralino • Search for and in MSSM Add data from Run IIb for ee+isolated track No excess seen See S03-9 talk K. Tollefson, LP07

  31. SUSY Trileptons Previous limit K. Tollefson, LP07

  32. Searching Broadly for New Physics using Vista • Model independent search of high PT data • Compare # of events and 16486 kinematic distributions to SM in 344 exclusive final states based on objects in event Objects = e, , , , jet, b-tagged jet with PT > 17 GeV Probability of observing most discrepant excess = 8% K. Tollefson, LP07

  33. Searching Broadly for New Physics using Sleuth • Quasi-model independent search • Look for excess in high PT tails • Merge Vista final states • Discovery case if P < 0.001 Most interesting Sleuth final state is bb Fraction of hypothetical similar experiments to observe something as interesting as CDF is 46% K. Tollefson, LP07

  34. Conclusions • Tevatron delivering and CDF/D0 are collecting record data sets • Achieving Run II precision goals • Mt, Mw, ms • Breaking new ground exploring Top, B baryon and Diboson sectors • Searching everywhere for Higgs and signs of New Physics! • Will double our datasets by ICHEP ‘08… K. Tollefson, LP07

  35. ICHEP ‘08 Something new could emerge at any time!!! K. Tollefson, LP07

  36. Backups

  37. Mtt and Z´ Stay Tuned MZ´ = 750 GeV K. Tollefson, LP07

  38. Vista final state normalizations K. Tollefson, LP07

  39. Vista kinematic shapes K. Tollefson, LP07

  40. Sample discrepant distribution K. Tollefson, LP07

  41. Sleuth Sensitivity Q: Would Sleuth have found the top quark? A: Yes. Expected Run II discovery luminosity ~80 pb-1 (Run I discovery 67 pb-1) K. Tollefson, LP07 41

  42. CDF Run II preliminary (927 pb-1) Sleuth@CDFIIa result (top 5) • Sleuth finds no significant excess in 1fb-1 of CDF Run II high-pT data • 46% of pseudo experiments are expected to be as interesting • This does not prove there is no new physics present K. Tollefson, LP07

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