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Tevatron Achievements and Goals: Advancements in Particle Physics Research

Discover the remarkable progress at Tevatron over the years, including increased luminosity, precision measurements, and breakthrough discoveries like Bs mixing and B baryon sightings. Explore Tevatron's objectives for Run II, aiming for precise measurements in top mass, W boson properties, and Bs oscillation frequency. Learn about the ongoing search for Higgs and exploration of Beyond Standard Model physics at Tevatron. Dive into detailed studies on Bs mixing, top quarks properties, diboson results, and top FCNC in the pursuit of unveiling new physics.

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Tevatron Achievements and Goals: Advancements in Particle Physics Research

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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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