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CDF: Prospettive e upgrades

CDF: Prospettive e upgrades. INFN - Riunione della CSN 1 Lecce 24 Settembre 2003 Franco Bedeschi INFN-Pisa. SOMMARIO. Stato Tevatron e CDF Risultati recenti e prospettive Run IIB: Situazione generale Stato progetti a partecipazione italiana L’upgrade del CPR (v. presentazione S. Lami)

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CDF: Prospettive e upgrades

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  1. CDF: Prospettive e upgrades INFN - Riunione della CSN 1 Lecce 24 Settembre 2003 Franco Bedeschi INFN-Pisa SOMMARIO • Stato Tevatron e CDF • Risultati recenti e prospettive • Run IIB: • Situazione generale • Stato progetti a partecipazione italiana • L’upgrade del CPR (v. presentazione S. Lami) • L’upgrade di SVT (v. presentazione di P. Giannetti) • Calcolo (v. presentazione S. Belforte) • Sommario richieste finanziarie F. Bedeschi, INFN-Pisa

  2. TeV Luminosity(current situation) 5x1031 • Peak luminosity • Best 5.2x1031 • Delivered/on tape • 330/260 pb-1 Initial instantaneous Integrated Delivered On tape Luminosity F. Bedeschi, INFN-Pisa

  3. Tev 2003 Luminosity ~250 pb-1 As of 9/3/03 • Goals for 2003 • Base goals: • 200 pb-1 in FY 2003 • 10 pb-1/wk end of 2003 • 5.4x1031 typical • Stretch goals: • 320 pb-1 in FY 2003 • 15 pb-1/wk end of 2003 • 7.6x1031 typical (~max achievable without Recycler) • Integrated luminosity goal achieved, but … • Half of shutdown in FY04 • Avg. lum. lower than predicted • FY04: Double data set ~150 pb-1 As of 5/6/03 F. Bedeschi, INFN-Pisa

  4. CDF operations • All CDF operating reliably • Silicon stable • Data taking efficiency high • 80-90% typical • Some limitations in L1 trigger output rate • < 20 kHz achieved ~ 50 kHz design • Force prescale of B physics • Problem gets worse at higher luminosity (more in Paola’s talk) • Requires work on DAQ/L2 • Massive Italian effort on SVT • L00 aligned and improving resolution Hadronic Bs trigger Now F. Bedeschi, INFN-Pisa

  5. SVT trigger improvements in 2003 (at 0 cost) • Whatever could be done with no upgrade has already been done! • 4/5 : 1.5x efficiency, more uniform coverage, avoid efficiency change while single SVX ladder are out of DAQ for a few days - Carosi • 3/3 : recover another SVX wedge/barrel - Carosi • AMS firmware optimization : saves 700nsec – Belforte • Avoid fitting tracks 1.5<Pt<2 : 30% less to fit – Belforte • Skip events that do not require SVT al L2 (hight Pt jets, MET and leptons): saves 1 microsec (more as L increases) – Belforte, Rescigno • Road Warrior: removes duplicate fit combination for 4/5, saves 30% of time • Algorithm, timing studies, simulation, proof of feasibility - Annovi, Belforte, Catastini, Cerri • Firmware – Spinella (this fall) • Money (~60k$) - Fermilab F. Bedeschi, INFN-Pisa

  6. Results from L00 • Clear D resolution improvements with L00 • Most gain at low pt and in areas with much material • Still room for improvement of alignment F. Bedeschi, INFN-Pisa

  7. Physics Results • Data used for summer conferences 2003 • Data set collected February 02 – May 03 • 230 pb-1 delivered, 170 pb -1 on tape, <140 pb -1 used for analysis  now 330 pb-1 delivered, 260 pb-1 on tape • Some preliminary results available at higher statistics • Much progress since May 03 • Italian group is giving key contributions • Will cover only highlights with emphasis on Italian work • Top quark • EWK • B physics • Discuss Bs mixing reach as example of trigger issues F. Bedeschi, INFN-Pisa

  8. Italian group contributions • B/charm physics • Topics:Bhh (ACP, BR),Lbpp search, BsDsp & lnDs (preparatory to Bs mixing), Bsff, BdfK*, BfK (ACP, BR), D0hh (BR, ACP) • Groups involved: Padova, Pisa, Roma, Trieste • High pt physics • Topics:Zbb, Higgs searches, top physics, hadronic top, top backgrounds, b-tagging, W+jets, forward W’s • Groups involved: Bologna, Padova (Trento), Pisa, Roma • Responsibilities: • Conveners of B physics subgroups • Convener of top group • Members of important review committees (eg. Higgs reach) • Most work in close cooperation with other non-Italian groups • Most work in close cooperation among the Italian groups F. Bedeschi, INFN-Pisa

  9. Top (di-leptons) HT: scalar sum of all the measured “objects” ET’s(leptons,jets) 2 high pT leptons (e,m,t,iso track) Large Missing ET 2 central jets F. Bedeschi, INFN-Pisa

  10. Top (l+jets) 1 high pT lepton(e,m) Large Missing ET 3 central jets F. Bedeschi, INFN-Pisa

  11. Top x-section F. Bedeschi, INFN-Pisa

  12. Top mass CDF RunII preliminary, 108 pb-1 CDF RunII preliminary, 126 pb-1 Data 22 evts 6 events Mass in lepton+jets channel with a b-tagged jet Mass in dilepton channel F. Bedeschi, INFN-Pisa

  13. Hadronic top • Work in progress! • Top mass distribution with 165 pb-1 of double tagged multi-jet events • Background from 0 tag sample • Main goals: • Top x-section in hadronic channel • Top mass measurement in hadronic channel F. Bedeschi, INFN-Pisa

  14. Zbb 2 tags 2 tags subtracted • Work in progress • ~70 pb-1 • Update soon with >x2 statistics • Good understanding of sample composition • Trigger updated • Critical signal for: • Top mass accuracy • Improving bb di-jet mass resolution 1 tag subtracted 1 tag F. Bedeschi, INFN-Pisa

  15. Forward W’s • Current blessed result with ~70 pb-1 • Update soon • Working on cross section systematics • Goals: • Measure x-section in forward region • sW = 2.81±0.39 nb • Include forward W’s in top and other high pt analyses F. Bedeschi, INFN-Pisa

  16. y 3870 • ypp narrow resonance at ~ 3870 MeV reported by Belle at Lepton-Photon • 34.4±6.5 events • May be an L=2 cc state • CDF has searched for this state in its large sample of y (>2M) and found it too! • 8.5 s effect • Hint seen in run 1 data F. Bedeschi, INFN-Pisa

  17. B lifetimes • Complete set of lifetime measurements with exclusive B states • Bu, Bd show reliability • Bs already better than WA Bu Bs F. Bedeschi, INFN-Pisa

  18. Bs  lnDs • Collecting the high statistics samples of B lepton + Charm • Still working on lifetime systematics • This sample can be used also for Bs mixing F. Bedeschi, INFN-Pisa

  19. L~180 pb-1 Hadronic B’s (2 body) • Yields doubled • Trigger work! • 871 events in peak! • Now seff ~ 6 pb • Measurements with 68 pb-1 only: • Will update for winter conferences Tight cuts 871 events Loose cuts 1766 events • = 5.252(2) GeV/c2  = 41.1(1.9) MeV/c2 Simulation BdK BsKK Bd BsK  M() F. Bedeschi, INFN-Pisa

  20. Hadronic B’s (two body) • Current measurements and projections (68 pb-1) • fs BR(BsKK)/fd BR(BdKp) = 0.74±0.2±0.22 • First measurement! CDF only • Expect 10% error by next summer • BR(Bdpp)/BR(BdKp) = 0.26±0.11±0.06 • Belle/BaBar errors: 0.033/0.035 LP2003 • Could reach above accuracy by fall 2004 • ACP(BdKp) = 0.02 ± 0.15 ± 0.017 • Belle error: 0.035 LP2003 • ACP(Bdpp) : • need ~2 fb-1 for g measurement to 10o • 10o is still statistics limited • Expect ~x2 error reduction with current statistics (180 pb-1) • Systematic too with better dE/dx F. Bedeschi, INFN-Pisa

  21. BR(B±  fK±) at CDF First time at CDF :B±  fK± • 23 ± 7events • 120 pb-1 BR( B±  fK± ) ———————— = 0.0068 ± 0.0021(stat.) ± 0.0007(syst.) BR( B±  J/yK± ) F. Bedeschi, INFN-Pisa

  22. Hadronic B’s (many bodies) • Understanding backgrounds and yields with large MC samples B+ F. Bedeschi, INFN-Pisa

  23. Hadronic B’s (many bodies) • Understand hadronic Bs yield. Measure BR: NEW! • BR(BsDsp) = (4.8±1.2(stat)±1.8(BR)±0.8(sys)±0.6 (fs/fd))x10-3 F. Bedeschi, INFN-Pisa

  24. Bs mixing expectations • Expectations extrapolating from current data • Still large uncertainties on: • Final event yield (depends on upgrades) • Max lifetime resolution achievable • Max eD2 (tagging power) achievable • Make very conservative assumptions! • Sensitivity = Dms/s • 2s sensitivity for = 15 ps-1 with ~0.5 fb-1 • Surpass current world limit • 5s sensitivity for = 18 ps-1 with 1.7 fb-1 • 5s sensitivity for = 24 ps-1 with 3.2 fb-1 • Current constraints: • Lower limit LEP+SLD:Dms >15 ps-1 WA • Constraints from global fits:Dms = 21 ± 4 ps-1 (Durham 2003) F. Bedeschi, INFN-Pisa

  25. Bs yield • At higher luminosity need more L1 BW to preserve current yield • Expect ~2000 ev/fb-1 using additional Ds decay modes 4x1031 6x1031 8x1031 Current performance F. Bedeschi, INFN-Pisa

  26. Tev goals beyond 2003 • Fermilab has scaled down its plans for luminosity in June 2003 • Silicon upgrade canceled! • No long shutdown in 2005 • Design plan max luminosity: 2.94x1032 • No recycler ~ base plan F. Bedeschi, INFN-Pisa

  27. 8.56 fb-1 design plan 4.41 fb-1 base plan Impact on Higgs reach • Reach for SM Higgs and other “new” physics searches affected by factor 2-3 reduction in expected total integrated luminosity (relative to 15 fb-1) Sensitivity re-evaluated in June 2003 Slightly better Retain sensitivity to a low mass SM Higgs F. Bedeschi, INFN-Pisa

  28. Impact on physics program • Even 2 fb-1 represents x20 more luminosity than run 1 • Major CDF/D0/Tevatron upgrade was fully justified by this expected integrated luminosity • We will get more than 2 fb-1, but not 15 fb-1 as the lab made us hope for some time • Important to make best of available luminosity • All other upgrades needed for this • CDF is re-evaluating physics priorities and role of upgrades • Full support from Witherell, P5 and PAC on all other upgrades F. Bedeschi, INFN-Pisa

  29. Upgrade del rivelatore al Silicio per CDF Run IIb • Il progetto e’ stato cancellato in fase di Preproduzione: • Tutte le parti gia’ a SiDet in quantita’ (~15% del totale) • Sensori da HPK al terzo mese di produzione (~350 a SiDet) • “On schedule” per finire a Maggio ‘05 (18 mesi di anticipo rispetto alla data ufficiale di Nov ‘06). • Ottimi risultati su svx4 chip e ibridi • Costi stimati ridotti notevolmente • Progetto di chiusura: • Costruire 15 staves => installare nel prototipo di Barrel => el./mech. tests • Costruire 5 moduli di L0 => installare nel CF support structure => el./mech. tests • Installare L0 nel Barrel => e./mech. Tests • Circa 6 mesi con costi minimi (quasi tutto labor cost) F. Bedeschi, INFN-Pisa

  30. Summary of upgrade projects • Calorimetry upgrades • New central preradiator (CPR2) (see talk by Stefano Lami) (*) • Add timing to EM calorimeters (*) • Tracking upgrades • Full replacement of all silicon systems inside ISL (*) • Trigger upgrades • Improve resolution of L1 track trigger • Rebuild global L2 • Increase event builder throughput • SVT upgrade (RW & associative memories) (see talk by P. Giannetti) (*New) • DAQ upgrades • TDC upgrade (speed up chamber readout) • Double SRC (speed up silicon readout) • CSL upgrade (double data logging bandwidth) (*) Activities with contributions from Italian group F. Bedeschi, INFN-Pisa

  31. Requests for upgrades • Silicon  NONE • Save 130 kEuro in 2003 + 150 kEuro in 2004! • Save 100 kEuro for additional SVT merger boards • CEM timing  NONE • Funding complete • CPR2 (see Lami’s talk): • 100 kEuro in 2003 from SJ (Pisa) • 82 kEuro in 2004 (Pisa) • SVT ass. Mem. Board upgrade (NEW see Giannetti’s talk) • 120 kEuro in 2004 (Ferrara) • 60 kEuro in 2004 (Pisa) • 150 kEuro in 2005 • Total cost 330 kEuro F. Bedeschi, INFN-Pisa

  32. Group composition • CDF Italian group has grown by 20% relative to last year • Good to have data! • Future activities important to keep the group together F. Bedeschi, INFN-Pisa

  33. FY 2003 missioni/consumi F. Bedeschi, INFN-Pisa

  34. MOF • No developments since last meeting of IFC in April • New IFC meeting deferred to end of October (maybe) • Propose to fund as last year (250 kEuro) • 20% increase in size of CDF Italian group overcompensates change in dollar exchange rate • There may be a need for adjustment after the October IFC meeting if some agreement is found F. Bedeschi, INFN-Pisa

  35. Summary of 2004 requests Includes all adjustments made after presentation of estimates in July 2003 F. Bedeschi, INFN-Pisa

  36. Backup Slides F. Bedeschi, INFN-Pisa

  37. TeV Luminosity(old slide May 13, 2003) • Peak luminosity still low but improving • Best 4.2x1031 • Delivered/on tape • 230/170 pb-1 4x1031 Initial instantaneous Delivered Integrated Luminosity On tape F. Bedeschi, INFN-Pisa

  38. Tev luminosity • 7 pb-1 /wk typical • Peak 9.7 pb-1 F. Bedeschi, INFN-Pisa

  39. Tev goals beyond 2003 • Fermilab long range plan (M.Witherell P5 presentation – March 26, 2003) F. Bedeschi, INFN-Pisa

  40. Status of CDF • Detector: • All systems commissioned and taking good quality data • ISL: more cooling lines opened during the January shutdown! • Only 1 cooling line (4% of total) remains plugged • Silicon (hardware/trigger) in general much more stable and reliable • ~90 % of all silicon systems currently taking data • L1 accept rate limitation removed • Some unrecoverable damage is piling up • % powered • % good • % bad • % error rate January 03 shutdown F. Bedeschi, INFN-Pisa

  41. New silicon • Status similar to May 03 F. Bedeschi, INFN-Pisa

  42. Status of CDF March 2003 Early June 2002 Silicon trigger coverage F. Bedeschi, INFN-Pisa

  43. Status of CDF • SVX electronics very delicate • Still learning how to protect it from further damage • Understand now much better sources of damage • Some concern about possible continuous degradation over long periods of time F. Bedeschi, INFN-Pisa

  44. L1 trigger • Require trigger deadtime < 5% • B triggers ~ 80% of L1, 50% L2/3 • Fake rates higher than predictions 4/4 Predicted L1 rate Vs luminosity Current Max. lum ~18 kHz 18 kHz F. Bedeschi, INFN-Pisa

  45. Bs trigger efficiency • Hard work has improved yields significantly F. Bedeschi, INFN-Pisa

  46. Additional Bs channels • Bs Dsp (Ds  ppp) ~30 events F. Bedeschi, INFN-Pisa

  47. Measuring Dms • Ingredients: • S = signal yield • S/B = signal/Background • st = proper lifetime resolution • eD2 = flavor tagging power • e = flavor tagging efficiency • D = flavor tagging dilution = 1-2w (w = flavor mistagging probability) F. Bedeschi, INFN-Pisa

  48. Bs mixing • Lifetime resolution • 67 fs NOW • 50 fs with event by event vertex and L00 • Flavor tagging studies in progress • Large errors still on eD2 measurements • Total ~ 6% in Run 1 sin(2b) analysis • Now we have kaon tagging, but much more material • NN like techniques could help too • Assume (very conservatively!): • eD2 = 4% now (only SST, jet charge, lepton tags) • eD2 = 5% later after including kaon tags F. Bedeschi, INFN-Pisa

  49. Bs mixing xs SM central value • 5s measurement • Feasible with moderate improvements in 2 fb-1 • Can beat current world limit with 500 pb-1 and “current” performance • Harder than expected: needs lot of work and luminosity/detector upgrades Moderate improvements Now pb-1 F. Bedeschi, INFN-Pisa

  50. Tevatron goals beyond 2003 • During the June PAC review the issue of the usefulness of the silicon upgrade was seriously considered, but deferred to after the July accelerator review • Other upgrades regarded as “…already desirable at considerably lower luminosities.” • July DOE review of accelerator (Lehman) found the design goals ambitious and the base goals rather safe • On September 3rd Witherell cancels silicon upgrade, but • Run II will still have highest priority. Resources recovered will be spent to improve Tevatron • Committed “…to complete the non-silicon parts of the CDF and D0 upgrades.” F. Bedeschi, INFN-Pisa

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