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September 1, 2009

Phone bridge number {} 617 324 7374 {} , Time 2:00 pm to 3:30 pm, up to 12 connections
Agenda

1. result of analysis of SL09b production
   1. Jan (Drupal blog )
      1. presentation of algo ver 4.0 - not linked
      2. Run 9 data
         1. histogram-based dump of selected events
         2. Larger collections of events: di-jets , W-candidates , Z-candidates

         3. Wiki Markup
            Matt's [3 interactive events in skechup | http://drupal.star.bnl.gov/STAR/system/files/STAR-pp500-sketchup-events.zip] or just [one view | http://drupal.star.bnl.gov/STAR/system/files/Picture%203_27.png] , [at Scott's angle | http://drupal.star.bnl.gov/STAR/system/files/Zrun10091090_eventId50960_version0.pdf] !http://drupal.star.bnl.gov/STAR/system/files/Zrun10091090_eventId50960_version0.pdf!

         4. sequential histograms from pass through 1M events (LT=~8/pb)
      3. M-C simulation analysis histograms for Pythia W-events (LT=320/pb) , filtered QCD-events LT=6.3/pb, Z-events LT=4200/pb
   2. Joe
2. discussion of Run 9 data publication strategy
   1. Questions/comments from former prominent STAR collaborator:
      • Could the Z-candidates be di-jets? cosmic rays? Do you try to do any charge sign discrimination on the electrons (i.e., opposite sign on the 2 sides for "Z-candidates")? Phi distribution does not appear indicative of cosmics.
      • Most importantly, is "Jacobian peak" absent when you look at 200 GeV data with the same algo and cuts?
      • Lots of questions, but this does look really promising, seems to give you NN W candidates NN Z candidates in the barrel region. It's a bit surprising that such a crude isolation cut, with no away-side ET upper threshold or SMD criterion, would suppress jet background so effectively. We always thought we would have to work much harder than this to unveil a signal above background.
3. Ross - vernier scan analysis
4. Joe - BTOW relative gains
5. AOB

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