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EW observables probe the Higgs bosons indirectly by means of quantum corrections .

Electroweak Measurements. EW observables probe the Higgs bosons indirectly by means of quantum corrections . Large quantum corrections to EW observables come from the top quark. M top : Direct vs. Indirect. Indirect meas.s : fits to EW observables. Direct meas.s : CDF and D0.

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EW observables probe the Higgs bosons indirectly by means of quantum corrections .

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  1. Electroweak Measurements • EW observables probe the Higgs bosons indirectly by means of quantum corrections. • Large quantum corrections to EW observables come from the top quark.

  2. Mtop : Direct vs. Indirect Indirect meas.s : fits to EW observables Direct meas.s : CDF and D0 Lower limits : direct searches in e+e- and pp

  3. Precision EW Measurements MH < 165 ~ 206 GeV at 95% CL Favor light Higgs

  4. EW Measurements (last ~10 years) 1991 Mtop limit Mw (GeV) MH (GeV) 2001 1991 1995 1s prediction year Mtop (GeV)

  5. Higgs Searches at LEP 2 (e+e- collider) M > 109 GeV 3.0 ZH, 3.6 bgrn, 6 observed e+e- ZH cross section (fb) e+e- cm energy (GeV) ~2s excess observed in agreement with MH ~ 115 GeV or MH > 113 GeV at 95% CL

  6. Higgs Searches : LEP 2  Tevatron & girls LEP 2 Tevatron

  7. Tevatron Run IIa EW Measurements Run IIa

  8. Tevatron & CDF/D0 Upgrade (Run II) u W+ W+* - d H W+ H t W- LEP Reach

  9. Run IIb 2004 ~ 2007 (?) 20fb-1 (?) Run IIa 2001 ~ 2003 : 2fb-1

  10. CDF Detector installing silicon tracker, prior to detector roll-in

  11. CDF Silicon System 1.5m ~722 k channels electronics silicon

  12. CDF Drift Chamber Hit Resolution ~200mm Goal : 180mm 96 layers residual dist. (cm) e+ g e- a collaboration of several groups including Y.K.Kim’s group (Berkeley)

  13. CDF : Preparing for First Physics … J/ym + m- M(m m) GeV/c2 Kop+ p- L  p p B+ J/y K+ Z  e+ e- W  e n transverse mass Jets

  14. J/ym + m- M(m m) GeV/c2 Kop+ p- L  p p B+ J/y K+

  15. CDF B Signals

  16. CDF B Signals

  17. CDF Z Signals

  18. CDF Z Signals

  19. CDFJets

  20. Near-term Prospects Physics with 200 pb-1 • B physics • BS mixing • Dsin2b • Top, EWK physics • a larger sample ~ (Run I) x 4 • Extend SUSY and new particle studies • QCD BS DSp, DSppp DS  fp discovery hint SM

  21. Physics beyond the Standard Model e superparticle ~ e+ e- e e Me Me ~ ~ Evolution of aEM, aWeak, aStrong • the Standard Model • Its foundation is symmetry. • Effective Theory • Supersymmetric extensions of the Standard Model • Supersymmetry relates bosons and fermions. • h, H, A, H+, H- • h SM Higgs • Mh < ~130 GeV • Grand Unified Theory • Unification of coupling strengths SUSY SM

  22. Energy Frontier Accelerators to understand origin of Mass necessary to understand EWSB 1991 2021 (year) 2001 2011 LEP (e e ) 208 GeV + - Tevatron (pp) 2 TeV Run I Run II LHC (pp) 14 TeV e e + - (0.5-1 TeV) ? , m+m- (2-4 TeV) ? e e + - pp (~100 TeV) ?

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