23 June 2005Kroll/Bedeschi1 Summary of 8 th 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

23 June 2005Kroll/Bedeschi2 (Old) Calendar for Near Term Summer 2005 = on week Lepton Photon, Uppsala HEPP-EPS, Lisbon CDF Week, Sitges

23 June 2005Kroll/Bedeschi3 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 –1 st to hadronics (no issue of partial reconstruction, less signal cross-talk) –then to semileptonics –Winter 2006 add as much 2005 data as possible

23 June 2005Kroll/Bedeschi4 Some More Details on Near Term Update of hadronic analysis includes –event by event primary vertex including new scale factors –D s 3  (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

23 June 2005Kroll/Bedeschi5 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 1 st 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

23 June 2005Kroll/Bedeschi6 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 L inst –updated SSKT  D 2 (not public) better physics simulation (Pythia tune A, MSEL=1) better detector simulation (PID efficiency, resolution from data) improvements from original p T rel algorithm Next workshop –late summer or early Fall –use subgroups to report progress in the interim