From: Claus O. E. Jorgensen (ekman@nbi.dk)
Date: Wed Jun 18 2003 - 10:47:17 EDT
Greetings from Russia, Just a few comments on the high pt business. I agree with Flemming that the y=0 and eta~2 suppression is consistent within the systematic errors. The different 12 deg settings gives results within 30%, so one can move the curve up and down depending on what setting one believes the most. I'm convinced that there is a suppression, but on basis of the present data I think it would be wrong to say that it's smaller or bigger that the y=0 data. I also think it's a good idea to publish the high pt story ASAP, but the 12 deg data needs some work. I would like to go back to the local tracking level and do the global tracking with: 1) the right geometry (which I believe is in the DB now?) 2) with the right parametrization of D1 and D2 magnetic fields (has this been updated?). 3) possibly the bfs tracking enhancement (if we can get the right efficiency calculation) 4) with global track refitting. This will hopefully improve the consistency between the settings. For the analysis of identified particles I think it's unrealistic to get on a short timescale (<1.5 month). So why not save this for later - we can do the analysis during the fall and have the results as preliminary, but let's publish after next run when the stat is better. If someone can redo the global tracking and the dsts (including the 4 points above) I can redo the eta~2 analysis and produce a detailed note on this during next week. Cheers, Claus
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