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- PPV , Rosi, solution to CMB problem - great job! PPV upsdate , code in CVS 4 days later. This problem is definitely solved.
- TPC calib: Joe
- SC &GL jobs are running
- from Gene alignment problem
- closing Endcap geometry - Ilya - not there yet
- embedding request: was approved by spin PWG,
- Jim made official request
- Jan is refining (details of this request
- status of pythia-filtering - work is ongoing
- Generation of M-C events w/ 2009 geometry (efficiency, embedding)
- shall we go privately with production
- shall we pay for it to Amazon (how to find $5-10K ?)
- BTOW calibration: Joe + Matt
- absolute gains from ideal gains * slope ratio * E/P correction were computed and uploaded to DB w/ the flavor 'Wbose2'. More details here
- Study of BTOW SF Ilya, Mike
- progress on W->Jet+Jet+X channel - few lose remarks were made, mostly suggesting it is not worth the effort. I still think it is worth to try, some day.
- AOB
October 27
Present: Justin, Joe, Ross, Will,Gene, Scott, Ilya,
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- result of analysis of SL09b production
- Jan (Drupal blog )
- presentation of W-algo ver 4.0 using BTOW & TPC, for 1M input events
- Run 9 results as of September 1 Slides
- histogram-based dump of selected events
- Larger collections of events: di-jets , W-candidates , Z-candidates
- Matt's 3 interactive events in skechup or just one view , at Scott's angle
- sequential histograms from pass through 1M events (LT=~8/pb)
- M-C simulation analysis histograms for Pythia W-events (LT=320/pb) , filtered QCD-events LT=6.3/pb, Z-events LT=4200/pb
- Suggestions: count # of track pointing to cluster; compare ET vs. PT for electron
- Joe adopted his algo developed on M-C to work with Run 9 data
- removed BSMD, changed to tower-based center of gravity, relaxed cuts: PT>5 GeV/c, delEta & delPhi<0.5, isoFraction of 0.8
- Uber-preliminary result for 1M input events results plots
- Jan (Drupal blog )
- Run 9 data publication strategy has been discussed and in general agreed up. Use of BSMD for PRL paper 1 was discussed - it is worth trying.
- 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.
- Jan: Lets plan to use BFC filter to get rid of not-BHT3 events from pp200 data. Process LT~10/pb. Needs: adopted filtering code, run selection, 1mm accuracy of TPC calibration (within month), supported production request
- Joe: estimate TPC tracking efficiency difference for e+ vs. e-
- from former prominent STAR collaborator:
- Ross - vernier scan analysis
- lots of detail about how I do the fit - Ross is looking for explanation why his calculations are off by ~4 orders of magnitude. knows
- Comparison of Vernier scan from 2 pp500 runs - background visible in both
- Comments/suggestions:
- post study with eliminated TP affected the most by the beam background - no link yet. Even removing the noisiest high tower patches still leaves considerable amounts of background. ADD LINK
- post input data from Angelika Raw data from Angelika
- exercise the code on mock data to verify it reconstructs width correctly
- Joe - BTOW relative gains, not yet
- new phone meeting time moved to : Tuesday 5-6 pm EDT
- low TPC tracking efficiency at eta~0. Gene: may by a better T0 suffice to correct it - lets wait for the outcome. How can we address this issue?
August 27, 2009
Present: Willie, Matt, Jan, Hal, Rosi, Justin
Minutes
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