Young-Kee Kim

1
Run II CDF and D0 Detectors
silicon, drift chamber, tile forward
calorimeters, muon systems, front-end, trigger
electronics software
silicon, sci-fi central tracker, 2T magnet,
preshower, muon systems, front-end, trigger
electronics, software
2
Luminosity
CDF/D0 stable PHYSICS running established in
early 2002

• Run I (0.1 fb-1)
• Run IIa Goals (2 fb-1)
• 4 x 1031 cm-2s-1 (by fall 02)
• 1 x 1032 (by spring 03)
  (Recycler as Accumulator)
• 2 x 1032 (by end of 03)
• (Recycler as Recycler)
• Run IIb Goals (1015 fb-1)
• 4 x 1032 (electron cooling as well as
  stochastic cooling in Recyler)
• My expectation
• Tevatron runs 1 year into LHC physics run.

Todays presentation 1020 pb -1 / expt. (70 pb
-1 / expt. delivered) 1020 of Run I
3
Run II Physics has begun!

• Re-establish Run I physics signals
• prepare for high-PT program Mtop, MW, sin2qW,
  Higgs, SUSY, Z, LED
• reconstruct leptons, Ws, Zs, jets, bs,
• t Wb
• SM Higgs WH, ZH (H bb) at MH lt 135 GeV
• gg H WW, ZZ at MH gt 135 GeV
• measure sW, sZ, AFB
• Calibrate precision track measurements
• exploit high cross-section signals measure B
  lifetimes, masses
• begin B physics program (lifetimes, masses, Bs
  mixing, CP, Lb, Bc, )
• provide calibration/tools for MW, Mtop, b-jet
  tagging
• hugh charm signal - D0 Kp online monitor

4
Run II Physics has begun! (cont.)

• Exploit new trigger capabilities
• Measure DM(Ds,D), Br(D0 ? KK, pp) / Br(D0 ? Kp)
• Learn to model trigger for B physics signals
• Reconstruct fully hadronic B decays B ? Dp, B ?
  hh
• Later searches for Higgs h/H/A?bb, Z?bb
  (calibration)
• Exploit new particle ID capabilities
• TOF (Identify p/ K/p), dE/dx (Identify soft e/ p/
  K/p)
• Later searches for new particles (charged massive)

5
Experiments will guide Theory?

• Anomalies in Run I data (CDF)
• Cross section at high ET jet
• Top Dilepton - kinematics
• ee ?? Missing ET - SUSY?
• W 2-b jets - excess

6
W / Z Cross Sections
CDFD0 20k Wen,mn 1k Zee,mm
CDF W tn
typical t decay multiplicity t important for
new physics
7
Forward-Backward Asymmetry
Z/g ee- (centralforward)
Toward sin2qW measurement, searches beyond SM
extra dimensions, Z,
8
Jets, Photons, Missing ET
Jet Multiplicity in W jets
Inclusive jet pT spectrum
Njet cut
DØ Run 2 Preliminary
Di-photon sample Multijet sample
Jet ET (GeV)
For ET gt 400 GeV, s (?s 1.96 TeV) 2 x s (?s
1.8 TeV)
Missing ET (GeV)
Toward Top, Higgs, New Phenomena