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CDF Status and Prospects for Run 2

This document provides an overview of the Tevatron accelerator and CDF detector, discussing luminosity, QCD, heavy flavor, electroweak physics, and ongoing searches. It examines the improved performance and physics prospects for Run 2, including measurements of heavy flavor production, Bs meson properties, and electroweak interactions. With detailed insights into particle physics phenomena and experiments, this comprehensive presentation outlines the current status and promising advancements at the Tevatron facility.

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CDF Status and Prospects for Run 2

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  1. CDF Status and Prospects for Run 2 Tara Shears

  2. Introduction • Accelerator / detector overview: • Tevatron overview • CDF overview • Luminosity • Physics prospects and first results: • QCD, Heavy flavour, Electroweak, Searches • Conclusions

  3. Tevatron overview

  4. _ p-p collisions at s = 1.96 TeV The Tevatron D0: 650 people 18 countries CDF: 706 people 12 countries

  5. Tevatron operating parameters

  6. CDF

  7. CDF XFT,SVT triggers

  8. L00

  9. SVX

  10. ISL

  11. % good silicon ladders % bad silicon ladders Si performance % silicon ladders integrated % average error > 90% operational

  12. L00 performance sd0 pT L00 improves uniformity of impact parameter res.

  13. Level 2 hadronic B trigger s(d0) ~ 48 mm 15 ms operation online primary vertex finding, tracking trigger on displaced tracks SVT Level 2 Trigger M(hh)

  14. TOF Performance TOF resolution within 10 –20% of design value (100 ps) Calibration ongoing eg. f S/N = 1942/4517 TOF S/N = 2354/93113

  15. Luminosity

  16. Integrated luminosity Total lumi (pb-1) Run 1 lumi Up to 180 pb-1 will be shown Mar. 2001 Sep. 2003

  17. Physics in Run 2

  18. Physics in Run 2 # events in 1 fb-1 1014 1011 107 104

  19. QCD Vital to understand QCD in order to perform precision/search physics Run 1 inclusive jet cross section Consistent over 7 orders of magnitude deviation at high Et BUT

  20. SM explanation Run 2 - more high Et jets: Test QCD at high Et Discriminate between new physics and gluon PDF New bins for Run 2 Important gluon-gluon and gluon-quark contributions at high Et Gluon PDF @ high x not well known.

  21. Jet 1 ET = 583 GeV (raw) hdet = 0.31 Jet 2 ET = 546 GeV (raw) hdet = -0.30 Had E Em E h-f view CDF Run II Preliminary Dijet mass Highest Et jets seen at the Tevatron! Consistent with SM M(jj)=1364 GeV/c2

  22. B C s(B+): Phys Rev D65 052005 Heavy flavour production: Run 1 Nason, Cacciari UPRF-2002-4 • Discrepancy from Run 1: • B: s(data)/s(improved theory) ~ 1.7 • C: similar effects seen • Aim: test predictions at Run 2 CDF Preliminary:s(D*) Cacciari: hep-ph/9702389

  23. Charm production: D0,D+,D*+,Ds+ • Use SVT (5.8 pb-1) to obtain • D0 K-p+ • D*+ D0p+ • D+ K- p+ p+ • Ds+f p+ • Determine prompt component (fit D impact parameter) • Compare s(D) to NLO Combinatorics Wrong K-p D0 i.p.

  24. Charm production: D0,D+,D*+,Ds+ Nason & Cacciari hep-ph/0306212 s(D0, pT 5.5 GeV) = 13.3±0.2±1.5µb s(D*+, pT 6.0GeV) = 5.2±0.1±0.8µb s(D+, pT 6.0 GeV) = 4.3±0.1±0.7µb s(Ds, pT 8.0 GeV) = 0.75±0.05±0.22µb

  25. Run 2 improvements: Better tracking systems TOF for K-p separation Displaced track triggers Increased lumi for rare decays Heavy flavour • Measurements in Run 2: • Production • Bs mass, lifetime, mixing • CP from Bs, B0 • B baryon lifetime, mass • Rare decays, Bc study Tevatron only place to study Bs, b baryons, Bc

  26. B masses M(B+) = 5279.32 ± 0.68 ± 0.94 GeV (5279.0 ± 0.5) M(B0) = 5280.30 ± 0.92 ± 0.96 GeV (5279.4 ± 0.5) M(Bs) = 5365.50 ± 1.29 ± 0.94 GeV (5369.7 ± 2.4) M(LB) = 5620.4 ± 1.6 ± 1.2 GeV (5624 ± 9) PDG

  27. Charm: M(Ds+)-m(D+) Submitted to PRD! Cross-check of lattice QCD, HQET charm mass Use large SVT triggered charm sample m(D+s)-m(D+) = 99.41  0.38  0.21 MeV/c2 PDG 02: 99.2  0.5MeV/c2

  28. B lifetimes ct(B+) = 1.63 ± 0.05 ± 0.04 ps (1.671 ± 0.018) ct(B0) = 1.51 ± 0.06 ± 0.02 ps (1.537 ± 0.015) ct(Bs) = 1.33 ± 0.14 ± 0.02 ps (1.461 ± 0.057) ct(LB) = 1.25 ± 0.26 ± 0.10 ps (1.229 ± 0.080) More stats with SVT s.l. decays…

  29. Heavy flavour using SVT(+TOF) Allows exclusive hadronic decay mode reconstruction:

  30. xs = Dm/G (>14.4 ps-1@95%) Bs oscillation much faster than Bd because of coupling to top quark: Re(Vts)0.040 >Re(Vtd)0.007 Use SVT to trigger Bs Tag charge at production Tag charge at decay Measure lifetime e-t/t t   s b B0 B0 W W+   b s t Vtb~1 Re(Vts)0.04 Pmix(t) = 0.5*(1-cos(Dm t)) Bs mixing

  31. Current (future) performance: No. events: 1600 (2000) /fb-1 D2 = 4 (5) % t = 67 (50) fs Improvements: More Bs channels Better tracking, tagging Sensitivity: Current performance: ms=15 ps-1 / 500 pb-1 (2s) Future performance: ms = 18 ps-1 / 1.7 fb-1 ms = 24 ps-1 / 3.2 fb-1 (both 5s) Predicted Dms reach

  32. Bs mixing complementary method • Dm DG = f (tH, tL ) • Separate eigenstates and measure each lifetime • BS DS+ DS- (CP even) Work continuing in triggering on these difficult hadronic modes (track/vertex/reconstuct) • BS J/y f(CP even&odd) Different angular distribution for mm allow separation of CP even and odd states • BS J/y h(CP odd)

  33. Electroweak physics

  34. Run 2 benefits: s(W), s(Z)  12 % s(WW), s(ZZ)  13 - 22% Measurements in 2fb-1: m(W) measured to 40 MeV (sys. dominated - theory) G(W) measured to 30 MeV couplings measured to ~0.3 Electroweak:W,Z W,Z essential calibration signals for high Et physics

  35. W,Z results Wmn Z  ee

  36. Run 2 benefits: s(tt)  40% More luminosity Increased b tagging efficiency + lepton acceptance Electroweak: top lq q nqq ll q • Measurements in 2 fb-1: • m(top) ~ 1.2% (cf. 2.9%) • s(tt) ~ 10% (cf. 25%) • s(single top) ~ 20% (1st!) • |Vtb| ~ 12% (1st!) nnq 12% 44% 44 % Tevatron only place to study top until LHC startup

  37. First dilepton tt candidate

  38. Top Results M(top) (run1) = 176.1 ± 6.6 GeV/c2 M(top) = 177.5 +12.7/-9.4stat  7.1sys GeV/c2

  39. Top mass motivation Run 2 expected precision

  40. s(t) ~ 0.9 ±0.1 pb (W*) s(t) ~ 2.0 ±0.2 pb (Wg) s(t) |Vtb|2 Tag by 1 high Pt e,m + 2 jets ( 1 b) + Et Expect 18.5 ± 2.9 events, see 19 Electroweak: single top / st(combined)<17.5pb @95% C.L.

  41. Searches

  42. Production and Decay of Higgs 2 fb-1 data: ~ 2,000 Higgs (200 H+ W,Z) Backgrounds much larger than at LEP

  43. 8.6 fb-1 4.4 fb-1 LEP mH>114.4 GeV @95% CL Discover at m(H) ~ 115 GeV  Exclude m(H) ~130 GeV

  44. SUSY: stop • stop decays: • (eg.) t b c1+ • c1+ l nc0 • (or) t  b W c0 • W  l n • tag with b jet + lepton + Etmiss ~ ~ ~ ~ ~ ~

  45. Stop results Long lived stop analysis: High pt track, large TOF deposit Expect 2.9  0.7 ± 3.1 events See 7 in data  M(stop) > 107 GeV

  46. / SUSY: eeggEt / eeggEt event in Run 1: radiative decay of neutralino to gravitino? (gravitino lsp) pp ci +cj-  c01c01 + X  g g G G + X Look for more events, + gg channel in Run 2 _ ~ ~ ~ ~ ~ ~

  47. Diphoton: GMSB: radiative decay to LSP (gravitino) If neutralino NLSP: Searches: diphoton / ggEt MC > 113 GeV/c2 @ 95% C.L.

  48. SUSY: projected limits Expected limits for Run 2: (taken from Savoy-Navarra, EPS 99)

  49. Conclusions

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