Summary of 8th CDF B Mixing Workshop

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Summary of 8th CDF B Mixing Workshop

• Held morning of Thu 6/16/05 and Fri 6/17/05
• Topics of discussion
• status of updating hadronic analysis
• adding semileptonics from TTT
• applications of NeuroBayes to B mixing analyses
• studies of lifetime resolution
• progress on same side kaon tagging
• current projections
• other topics semileptonic lifetimes, B,
  fragmentation studies
• Productive discussion follow up in subgroup
  meetings
• B lifetimes and mixing
• BPAK

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(Old) Calendar for Near Term Summer 2005
CDF Week, Sitges
Lepton Photon, Uppsala
HEPP-EPS, Lisbon
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Proposed Plan

• Too late for update for LP05 and HEPP-EPS
• Instead focus on following milestones
• End Summer 2005
• complete update of Hadronic analysis with 2004
  data (360 pb-1)
• add semileptonics from TTT
• publish these results with aim to get in 2006 PDG
• Early Fall 2005
• add SS(K)T to analysis
• 1st to hadronics (no issue of partial
  reconstruction, less signal cross-talk)
• then to semileptonics
• Winter 2006
• add as much 2005 data as possible

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Some More Details on Near Term

• Update of hadronic analysis includes
• event by event primary vertex including new scale
  factors
• Ds3? (D3?, D modes in calibration sample)
• ? TTT triggers (if not already included)
• Neural net JQT
• Semileptonics in TTT
• same steps as semileptonics in lepton SVT
• increases signal statistics by factor 3
• better handle on fake lepton background
• revisit lifetimes can we make a measurement?
• Requested detailed plan for both analyses
• we know all the steps

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Some Comments on Longer Term

• Same side (kaon) tagging
• we saw a lot of interesting results here
• we are making progress productive collaboration
  of groups
• key (as we knew already) will be assigning
  systematics
• harder to make detailed plan have not been
  through 1st pass
• 2005 Data (i.e., post August 2004)
• processing and data access too immature to allow
  timescale
• we will have to validate this data and Version 6
  of code
• must be able to show some 2005 data in Winter
  2006
• processing/incorporation of new data a serious
  concern

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Some Miscellaneous Concluding Remarks

• Recommend sticking with recent projections (for
  Oddone)
• based on Winter 2005 analysis (e.g., measured ?t
  distribution)
• analytic formulations match sensitivity observed
  in data
• present signals best projection of yields
  versus Linst
• updated SSKT ?D2 (not public)
• better physics simulation (Pythia tune A, MSEL1)
• better detector simulation (PID efficiency,
  resolution from data)
• improvements from original pTrel algorithm
• Next workshop
• late summer or early Fall
• use subgroups to report progress in the interim