Preparations for ICHEP and Beyond

1
Preparations for ICHEP (and Beyond)

• F. Bedeschi (INFN Pisa)
• J. Kroll (Penn)
• CDF B Mixing Workshop
• 14 July 2004

2
Schedule
FPCP 4-9 Oct.
3
Schedule (continued)

• CDFNOTE for ICHEP should be posted Monday 19 July
• Preblessing for ICHEP should be Thursday 22 July
• CDFWEEK 26-30 July (B meeting Fri. 30 July)
• Blessing for ICHEP should be Thursday 5 August
• Presentation of ICHEP results at FNAL on 9-10
  August
• ICHEP 16-22 August
• Thurs. 12 Aug. (off-week) could use for final
  sign-off if necessary
• Discouraged speakers might not accept such late
  results
• DPF 26-31 August
• Last possible blessing 19 Aug. (on-week)
• Next opportunity FPCP (Korea) 4-9 October

4
Bs Mixing Ingredients

• Reconstruct signal with adequate signal to noise
• semileptonic
• hadronic
• Measure Lifetime
• challenge including bias due to SVT trigger
• Identify B Flavor at production (flavor tagging)
• challenge estimating D for SST in Bs (for limit)
• Demonstrate technique with B0 mixing (?md)
• use this step to calibrate opposite side flavor
  tags
• eventually require likelihood fit
• Measure (place limit on) ?ms

5
Status Semileptonic Signal
Have blessed PR plots from Winter 2004 4.8
processing
Various modes Do not know exactly how they
contribute to sensitivity (e.g., KK)
6
Status Hadronic Modes
Blessed 4.8 processing
Workshop 5.1 processing
232 18 240 pb-1
Update Ds? PR plot
What about other decay modes?
7
Flavor Tagging

• Blessed
• Soft muon tag (binned in pTrel)
• Jet charge tag (binned in Qjet)
• SST (following Run I prescription)
• In preparation
• improved soft muon tag (likelihood based
  binned) preblessed 24 June
• soft electron tag (likelihood based - binned)
• jet charge (with jet probability, trying new jet
  finding)
• improved SST (with binning in pT track)
• OSKT, SSKT under study not ready for ICHEP
• Combination
• combined blessed SLT(?) and JQT
• use asymmetry framework no binning
  (underestimate ultimate ?D2)

8
Combined OST in Asymmetry Framework
9
Combined OST in Asymmetry Framework
Also quote ? and ?D2
10
Proposed Plan (in parallel)

• Prebless/bless SLT(e) updated SLT(?), JQT
• Prebless/bless binned asymmetry fit with OST (
  SST)
• goal is to show OST works for mixing use
  blessed OSTs SST
• underestimates OST tagging power (not binned)
• may add additional exclusive hadronic modes (D?,
  D???)
• Prebless/bless unbinned likelihood fit
• 1st step is J/?K (no SVT bias, lifetime checked)
• 2nd step is D? (include SVT efficiency in
  likelihood)
• have to show that we get the correct lifetime
• 3rd step is lepton D
• must include term for cc background give
  correct lifetime
• Allows binned flavor tags with correct accounting
  for correlations

11
3rd CDF B Mixing Workshop
Goal organize for 1st Bs mixing results for
Winter 2005