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

5. Tevatron operating parameters Run 1Run 2Now Date 1992 – 19962001 - 20092003 Integrated Luminosity 110 pb -1 5.0 – 9.5 fb -1 160 pb  c.m. energy 1.8 TeV1.96 TeV Luminosity 2 x 10 31 cm -2 s -1 2 x 10 32 cm -1 s -1 4.8 x 10 31 cm -2 s -1 Bunch spacing 3.5  s 396 – 132 ns396 ns

6. CDF

7. XFT,SVT triggers

9. Silicon system 3 separate detectors: –L00 (radius 1.5-2 cm) –SVX (radius 2.5- 10.5cm) –ISL (radius 20–30 cm) –Covers +- 50 cm in z –~750 000 channels! Installed in March 01

10. Si performance % silicon ladders integrated % bad silicon ladders % good silicon ladders % average error ~ 90% good and operational

11. SVT Level 2 Trigger Level 2 hadronic B trigger  (d0) ~ 48  m 15  s operation online primary vertex finding, tracking trigger on displaced tracks M(hh)

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

13. Luminosity

14. Integrated luminosity Total lumi (pb -1 ) May. 2003Mar. 2001 Run 1 lumi 50-80pb -1 will be shown

15. Physics in Run 2

16. QCD Jet cross-section, shapes  multijet events Heavy flavour Lifetimes, cross- section, B c,  B, B s studies, CP violation, x s Electroweak W: mass, width, gauge couplings Top: mass, cross- section, branching ratios Searches Higgs SUSY, compositeness, leptoquarks etc. # events in 1 fb -1 10 14 10 11 10 4 10 7

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

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

19. Dijet mass Jet 2 E T = 546 GeV (raw)  det = -0.30 CDF Run II Preliminary Jet 1 E T = 583 GeV (raw)  det = 0.31  -  view Had E Em E Highest Et jets seen at the Tevatron! M(jj)=1364 GeV/c 2 Consistent with SM

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

21. Heavy flavour using J/  Inclusive B lifetime: Tracking + alignment proof =1.526  0.034  0.035 ps (CDF) (PDG 02: 1.564  0.014 ps)

22. Heavy flavour using J/  Exclusive B reconstruction:  (B s )=1.26  0.2  0.02 ps (PDG 02: 1.46  0.057 ps) m(B s )=5360.3  3.8 +2.1-2.9 MeV (PDG 02: 5369.6  2.4 MeV) B s  J/   B  J/ 

23. Heavy flavour using SVT+TOF Allows exclusive hadronic decay mode reconstruction:

24. x =  m/  P mix (t) = 0.5*(1-cos(  m t)) Oscillation freq. width e -t/  Currently: x s > 14.6 Projection for 15 fb -1 : –20 000 B s decays –Effective tagging eff. *2 cf. Run 1 –Sensitive to x s < 63 Bs mixing

25.  m   f    L  –Separate eigenstates and measure each lifetime 1)B S  D S + D S - (CP even) Work continuing in triggering on these difficult hadronic modes (track/vertex/reconstuct) 2)B S  J/  (CP even&odd) Different angular distribution for  allow separation of CP even and odd states 3)B S  J/  (CP odd) complementary method Bs mixing

26. Not much lumi needed for quick limit BUT: Need had. B trigger Need tracking at full spec. Need tagging understood => Results summer 2004? Bs mixing reach

27. Charm: M(D s + )-m(D + ) Cross-check of lattice QCD, HQET charm mass Use large SVT triggered charm sample Submitted to PRD! m(D + s )-m(D + ) = 99.41  0.38  0.21 MeV/c 2 PDG 02: 99.2  0.5 MeV/c 2

28. Electroweak physics

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

30. Electroweak: W candidates W->  W->e 38628 candidates in 72 pb -1 21599 candidates in 72 pb -1

31. Electroweak: Z candidates 1631 candidates in 72 pb -1 Z->  1830 candidates in 72 pb -1 Z->ee

32. 12% l q q 44% l l q Electroweak: top Run 2 benefits:  (tt)  40% More luminosity Increased b tagging efficiency + lepton acceptance Tevatron only place to study top until LHC startup Measurements in 2 fb -1 : m(top) ~ 1.2% (cf. 2.9%)  (tt) ~ 10% (cf. 25%)  (single top) ~ 20% (1st!) |Vtb| ~ 12% (1st!)  q  q

33. First dilepton tt candidate

34. Top Results M(top) = 171.2  13.4 stat  9.9 sys GeV/c 2 NLO: 6.7+0.71-0.88 pb (mt=175) CDF l+l D0 l+jets CDF l+jets D0 l+l  (tt) PRELIMINARY M(top) (run1) = 176.1 ± 6.6 GeV/c 2

35. Top mass motivation Run 2 expected precision

36. Electroweak: single top  (t) ~ 0.9 pb (W*)  (t) ~ 2.4 pb (Wg)  (t)  |V tb | 2 Tag by 1 high Pt e,  + 2 jets ( 1 b) + Et Signal = peak in Wb invariant mass plot /

37. Searches

38. Production and Decay of Higgs 2 fb -1 data: ~ 2,000 Higgs (200 in association with W,Z) Backgrounds much larger than at LEP

39. Higgs: rates channelratemH= 110 mH= 120 mH= 130 lvbbsbsb 4.8 19 4.4 26 3.7 46 bb sbsb 4.6 36 3.2 39 2.1 30 llbbsbsb 0.9 3.2 0.6 23 0.4 1.9 qqbbsbsb 3.5 2800 2.5 2300 1.3 2000

40. Discover m(H) ~120 GeV, exclude m(H) ~ 190 GeV Expected Luminosity in Run 2 (updated) Exclude m(H) ~130 GeV Expected Luminosity in Run 2 Note: all numbers under review (new estimates for summer)

41. SUSY: stop stop decays: (eg.) t  b  1   1 +  l  0  (or) t  b W  0  W  l tag with b jet + lepton + Etmiss ~ ~~ ~ ~ ~

42. SUSY: trilepton topology Study lepton spectra for sensitivity to different SUSY models eg.  + 1 +  0 2 are produced,  0 1 is LSP  Specific search for decays   +   0 1 l  0 2   0 1 l l 3 leptons, often enriched in taus ~~ ~ ~ ~~ ~

43. SUSY: trilepton spectra Run 2 exclusion limits for 2 models:

44. SUSY: ee  Et ee  Et event in Run 1: radiative decay of neutralino to gravitino? (gravitino lsp) pp   i +  j -   0 1  0 1 + X   G G + X Look for more events, +  channel in Run 2 / ~~ ~~ ~~ _ /

45. Searches: diphoton Diphoton: GMSB: radiative decay to LSP (gravitino) If neutralino NLSP: / M C > 113 GeV/c 2 @ 95% C.L.  E t

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

47. Conclusions

48. Run 2 has just started at the Tevatron –New c.m. energy, high luminosity, new detectors Exciting program of physics ahead –Tevatron only place where top can be studied –Possibility of Higgs + new physics –Many areas of electroweak, heavy flavour and QCD physics to explore Run 2 physics underway … watch this space!!

49. Backup slides

50. Jet Cross Section vs  QCD sub-processes at small angles Central jets are more likely to signal new physics (hep-ph 0303013)

51. Run II Peak fill luminosity peak lumi 05/0303/01

52. Tevatron Operations Many reasons for not reaching design lumi

53. Electroweak: m(W) errors ErrorRun1b W  e Run 1b W   2 fb -1 W  e 2 fb -1 W   statistical65 MeV100 MeV14 MeV20 MeV lepton energy/momentum scale 75 MeV85 MeV20 MeV15 MeV lepton energy/momentum resolution 25 MeV20 MeV8 MeV6 MeV W production model47 MeV44 MeV30 MeV Fitting, selection etc.5 MeV31 MeV14 MeV16 MeV Total113 MeV143 MeV42 MeV40 MeV Run 1b= 110 pb -1

54. Heavy flavour physics

55. Heavy flavour physics: lifetimes First measurements which CDF will perform in b sector Necessary step towards oscillation Best measurement of B s 0,  b. (Unique) HQET:  (B + )/  (B 0 )=1.05  ( B s 0 )/  (B 0 )=1.00  (  b )/  (B 0 )=0.9 to 1.0 Experiment:  (  b )/  (B 0 ) is 0.78+-.04 2 fb -1 : 3000 B s =>  (c  B s )) ~ 0.03 ps 2000  B =>  (c  B )) ~ 0.04 ps

56. Heavy flavour physics: lifetimes

57. Millions of B mesons have already been produced in RunII. Need to trigger and identify relevant decays. Leptons ‘easy’; hadrons difficult Look for J/    c  =458±10±11  m (469±4  m) XFT,SVT Next step: B s,  B lifetimes… ~ 46%

58. Exclusive lifetimes BsB0 B+  (B+) c  =446 ±43 stat. ±13 syst.  m (502 ± 5)

59. Higgs Look in diffractive mode pp  pHp Reconstuct from missing mass of pp system CDF 55m 25-30 GeV mass resolution standard method, ~ 0.5 GeV resolution diffractive mode

60. Higgs Signal ( Cudell, Hernandez ) Background  small @ Tevatron, reasonable at LHC