From: Ian Bearden (bearden@nbi.dk)
Date: Thu Jun 26 2003 - 07:20:36 EDT
Dear Collaborators: Here is what I have received in response to my call for Progress Reports from the individual groups. Out of 12 institutions, 4 (Oslo, Bergen, TAMU, NBI) managed to respond. I know that at KU they are busy with calibrations of multiplicity for the d+Au run, and probably Steve did not have time to write this (and reasonably assumed I knew it?). As for other groups, I suppose everyone is as busy as we are here. Still, it IS IMPORTANT to SHARE with you collaborators, so please send your report with suitable alacrity. TAMU BRAHMS Progress Report 24-Jun-2003 I have continued making "final" iterations of Run-II p+p ratio data with an eye toward generating spectra. To this end I implemented a global track fitting module which received some initial interest as a possible check for consistency in the high pt suppression paper. Testing of this module is in progress. First iterations indicate that it may have "slightly" cleaned up the 3 deg and 4 deg data, but strange trends appear in the 12 deg data and this will have to be traced. The Global track fitting module was generated because I started working on a pure geometrical acceptance module for the FS ala J. H. Lee. (see http://pii3.brahms.bnl.gov/~jhlee/brahms/analysis/ coll_meeting_may_2002/Acceptance_f iles/v3_document.htm) I ran into the apparently "well known" feature that a well defined global track would not transport though brahms. This arises from the different momenta calculated from D2, D3 and D4. The global track fitting module solves that problem by finding a single momentum and direction which comes the closest to going through the local track origins. This project was put on hold until the global track fitting module. Given that it is almost finished, progress can soon be made again on the acceptance. (ed. note: Kris, JH, and Claus all seem to be on the 'same page' regarding this approach to the acceptance corrections. More progress will occur after the present HighPt effort is more complete) _From Norway, we learn that:__________________________________________________________________ Zhongbao: Currently working on: Spectra for high p_T pi- at 12 degrees. Immediate future plan: Look for reduced pp data for this years run. Deduce high p_T reference spectra for pi-. Ronny: Currently working on: Looking for photons converting to e+e- in the MRS trigger slats. Jens Ivar: Currently working on: Decay and absorption corrections in the FS. Immediate future plan: Preparation for talk at EPS'03 in Achen. The talk is titled: "Strangeness production in sqrt(s_NN)=200GeV AuAu collisions at RHIC". Bjørn: Currently working on: Extraction of a high p_T hadron reference spectrum at midrapidity, from last year's pp data. Immediate future plan: Continue work on hadron ratios, spectra and yields in pp collisions. Svein: Currently working on / immediate future plan: Getting started with analysis of d-Au data Trine: Currently working on: Momentum resolution corrections for high-pT spectra (unfolding procedure now ready to be used on measured spectra.) Immediate future plan: Finish lambda analysis and put together an analysis note summarizing Elin's work and the results on lambda transverse mass spectra. (Truls: Waiting for feedback from the Research Council regarding stipend /e Vacation Elin: Cand.scient. examination next Monday / Vacation Mads: Cand.scient. examination next Monday / Vacation) Here at NBI The primary effort of the majority of the group is to get the high-pt results (of which you should all be aware!) ready for publication. This has required a Hurculean effort on the part of Claus, who is almost finished with this analysis. There will soon be a web page explaining what has been done for Au+Au. The d+Au analysis is presented here: http://www.nbi.dk/~ekman/highpt/dAuAnalysis.html JJ and IGB are battling over the text of the article, and anxiously await comments from the collaboration as to the general picture. The aim is to have this draft ready for 'final' discussions within the collaboration this weekend, and to aim at having a letter suitable for PRL ASAP. In addition to this, Peter is doing some semi-independent checks of Claus' analysis. The next project is for PC and IGB to understand the discrepancies in the p and pbar data at y=3. Djamel is currently finishing up his thesis. The expectation is that there will be a draft for collaborators in the next 2-3 weeks. Marco will hold his Master's colloquium tomorrow. I would also like to remind all of you that there are open PhD stipends at NBI (for foreign students only). The application deadline is 15. Aug. More information can be found on the web, but the NBIfAFG web site is not well designed so it is difficult to get the link (which otherwise is only in Danish...but foreign students are welcome, really!) If you want more info, mail bearden@nbi.dk and I'll send you the pdf file of the announcement. That is all for now. Hope to hear from the rest of the collaboration soon. The next progress report is due Wed. 9. July 2003 before 1200GMT. Best regards, Ian
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