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QFTHEP’03 Samara-Saratov-Volgograd June 4-11, 2003. Status and Current Results of the CDF Experiment at Fermilab. Fedor Ratnikov Rutgers, the State University of New Jersey on behalf of the CDF Collaboration. Tevatron at Fermilab. 36 36 bunches (396 ns interaction spasing). Run I best.
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QFTHEP’03 Samara-Saratov-Volgograd June 4-11, 2003 Status and Current Results of the CDF Experiment at Fermilab Fedor Ratnikov Rutgers, the State University of New Jersey on behalf of the CDF Collaboration
Tevatron at Fermilab • 3636 bunches (396 ns interaction spasing) Run I best QFTHEP'03. F. Ratnikov: CDF Results
Tevatron Performance QFTHEP'03. F. Ratnikov: CDF Results
CDF Detector in Run 2 QFTHEP'03. F. Ratnikov: CDF Results
CDF Detector • Run I (...-1997) • Run 2 (2002-…LHC) • New • central drift chamber • double sided silicon • plug calorimeter • front-end • DAQ system • triggers • displaced track • tau QFTHEP'03. F. Ratnikov: CDF Results
Data Collecting in Progress Integrated luminosity (pb-1) • Anticipate achieving L~1 fb-1 in 2005 • projection for fiscal year 2009: • “base” L ~ 4.4 fb-1 • “design” L ~ 8.6 fb-1 CDF since June 2001 Delivered ~ 300 pb-1 Recorded ~ 230 pb-1 Summer 2003 prelim. results ~ 140 pb-1 QFTHEP'03. F. Ratnikov: CDF Results
Data Handling Bytes/day (read/write) • Total CDF Data on tape • 460 TB • Sustained tape IO • 5 TB/day: read • 2 TB/day: write • Data in the disk cache • dCache system, DESY • 1 TB/hour sustained reads (~300 MB/s) • This is a lot of data! • The system is pretty stable 10 TBytes/day (>100 MB/s) QFTHEP'03. F. Ratnikov: CDF Results
Road Map Electroweak QCD Top Exotics B-physics LQ H++ jjexo (jet) e ID ID ID jet ID Si tracks B Physics (Z) (W) MET B-tag R Z (top) M(top) (Z’) (VV) M(W) SUSY MSSM Higgs SM Higgs BS mixing QFTHEP'03. F. Ratnikov: CDF Results
Inclusive Jet Cross Section • Highest ET jets ever • extending Run I reach by 150 GeV • Have reduced systematic error from 5% to 3% since winter 2003 • Better coverage • Understanding jet cross section is cornerstone of doing physics at CDF QFTHEP'03. F. Ratnikov: CDF Results
Highest ET Jets Ever Seen on Accelerator QFTHEP'03. F. Ratnikov: CDF Results
Inclusive Jet Cross Section vs NLO QCD • Theoretical error dominated by PDF’s • Data currently agrees with NLO prediction within estimated errors QFTHEP'03. F. Ratnikov: CDF Results
W Cross Section (e, , channels) (t)? W We W QFTHEP'03. F. Ratnikov: CDF Results
Z Cross Section, R, (W) measure NNLO LEP Ze+e- Z+- QFTHEP'03. F. Ratnikov: CDF Results
VVV Coupling: W and Z Production • and e modes • Central , ET ()> 7 GeV • R(lepton, ) > 0.7 133 seen 141 expected Br (W) = 17.22.2(stat) 2.0(sys) 1.1(lumi) pb Br (Z) = 5.81.0(stat) 0.4(sys) 0.4(lumi) pb • In agreement with SM QFTHEP'03. F. Ratnikov: CDF Results
VVV Coupling: WW • Opposite-charge, high pT iso lepton (, e) pair • ETmiss > 25 GeV • ... • 5 events seen • 9.2 events expected • In agreement with SM prediction QFTHEP'03. F. Ratnikov: CDF Results
Top Physics • Br (tWb) = 100% • W’s decay modes are used to classify the final states: • Dilepton (, e) 5% • Lepton () + jets 30% • All jets 44% QFTHEP'03. F. Ratnikov: CDF Results
B hadrons travel Lxy~3mm befor decay with large charged track multiplicity Use b quarks semi-leptonic decays Distinguish from W/Z leptons: softer pT spectrum less isolated B tagging Silicon Vertex Tag Soft Lepton Tag QFTHEP'03. F. Ratnikov: CDF Results
Top Cross Section: Dileptons • two high pT iso lepton (, e) • two jets • ETmiss > 25 GeV • HT=ET > 200 GeV QFTHEP'03. F. Ratnikov: CDF Results
Double b-tagged Dilepton Event 69.7 QFTHEP'03. F. Ratnikov: CDF Results
Top Cross Section: Lepton+Jets • one high pT iso lepton (, e) • Njets 4 • ETmiss > 25 GeV • HT=ET > 200 GeV • Suffers from W+jets background QFTHEP'03. F. Ratnikov: CDF Results
Top Mass • Top mass is a fundamental SM parameter • directly reflects ttH coupling • important for radiative corrections QFTHEP'03. F. Ratnikov: CDF Results
Top Mass lepton + b-tagged jet dileptons QFTHEP'03. F. Ratnikov: CDF Results
Top Mass • mW/mtop constrains could be an evidence for new physics! QFTHEP'03. F. Ratnikov: CDF Results
Higgs@Tevatron: '03 Study preliminary • '98-'99 studies were very good approximation (~20%) • with L~4-5 fb-1 CDF+D0 would exclude SM Higgs if not there up to mh~130 GeV/c2 • For L~8-10 fb-1 might find a 3 evidence No systematics included! QFTHEP'03. F. Ratnikov: CDF Results
Signals Are not Dramatic Though • Need to control background shapes very accurately QFTHEP'03. F. Ratnikov: CDF Results
Tau in Run 2 Dedicated triggers h + MET h + lepton (e, ) di-h Z study under way Clear tau signature H search soon MSSM Higgs and Taus Hadronic track multiplicity (hcase) M(+l+MET) (ehcase) QFTHEP'03. F. Ratnikov: CDF Results
Search for H++ H He Hee • H++ appear in SU(2)LSU(2)R broken by Higgs triplet and others • Use same sign leptons (e and/or ) • M(H) > 110 GeV/c2 ( ande channels) QFTHEP'03. F. Ratnikov: CDF Results
Exotics in Dijets? Look for narrow resonance in dijet mass • ??? • No resonance found QFTHEP'03. F. Ratnikov: CDF Results
Scalar Leptoquarks QFTHEP'03. F. Ratnikov: CDF Results
Z’ and RS Gravitons • Search for high mass opposite sign dilepton pairs • Assume narrow resonance QFTHEP'03. F. Ratnikov: CDF Results
Z’ and RS Graviton Mass Limits e+e- and +- combined QFTHEP'03. F. Ratnikov: CDF Results
B-Physics Secondary Vertex B Lxy PT(B) 5 GeV Primary Vertex Lxy 450m d = impact parameter • Big brunch of CDF physics • Dedicated triggers: • J/ - e+e-, +- • effective up to PT=0 • lepton + displaced tracks • 2 displaced tracks • L1: high PT • L2: large d0 35m 33 m resol beam s = 48mm -500 -250 0 250 500 SVT impact parameter (mm) QFTHEP'03. F. Ratnikov: CDF Results
B-Physics: Masses • Measure masses using fully reconstructed BJ/X modes • B+ and B0 consistent with world average. • Bs and bmeasurements are world’s best: • M(b)=5620.4 2.0 MeV/c2 • M(Bs)=5365.50 1.60 MeV/c2 QFTHEP'03. F. Ratnikov: CDF Results
B-Physics: b decays • Use MC to parameterize the shape • Data to normalize the amplitude • Dominant backgrounds are real heavy flavor • proton particle ID (dE/dx) improves S/B Fitted signal: Measure: New Result ! BR(b c) = (6.0 1.0(stat) 0.8(sys) 2.1(BR) ) 10-3 QFTHEP'03. F. Ratnikov: CDF Results
BS Yields: BsDS+ BsDswith Ds + and KK+ • Br(Bs Ds) = ( 4.8 1.2(stat) 1.8(Br) 0.8(sys) 0.6(fs/fd) 10-3 • Previous limit from OPAL: Br(Bs Ds) < 0.13 QFTHEP'03. F. Ratnikov: CDF Results
Bs mixing perspectives key Issues: tagging flavour... ...correctly • Current detector performance • hadronic mode only • signal: 1600 events/fb-1 • S/B: 2/1 • D2: 4% • t = 67fs • 2 sensitivity for ms=15ps-1: ~0.5fb-1 of data • With “modest” improvements • signal: 2000 events/fb-1 • improve trigger, reconstruct more modes • S/B: 2/1 • D2: 5% • kaon tagging • t = 50fs • event-by-event tagging, L00 • 5 sensitivity for ms=18ps-1: ~1.7fb-1 of data • 5 sensitivity for ms=24ps-1: ~3.2fb-1 of data • ms=24ps-1 “covers” the expected region based upon indirect fits “same-side” tagging • Very challenging measurement • CDF is working hard on it QFTHEP'03. F. Ratnikov: CDF Results
Summary • CDF has improved detector on improved machine • Has exceeded statistics and abilities of Run I • Continuing to explore QCD, EWK, Top, B, Exotics • Many brand new results • only a fraction of results was covered in this talk • Much more is coming • Ready for BS mixing and Higgs • providing Tevatron is doing well QFTHEP'03. F. Ratnikov: CDF Results