From: Stephen Sanders (ssanders@ku.edu)
Date: Thu Jun 26 2003 - 07:58:23 EDT
Hi Ian and others, From KU: The dAu mult calibrations are starting to make sense. I'm working with Hiro (now BNL) on this and hope to have a usable centrality cut by the weekend. This has been slowed because of problems that I'm having with cdat files seemingly being corrupted after generation. RCF doesn't believe its a disk problem and I haven't been able to see anything that I'm doing that could cause the problem.... The initial attempt to reproduce our flow signature with Hijing/Geant looks very promising. Again, I need more geant simulations, but it looks that if I insert a v2 on the order of 0.06 I can obtain results very close to what we observe. The C4 PID studies have taken a back seat to the dAu mult calibrations... ...steve On Thursday, June 26, 2003, at 06:20 AM, Ian Bearden wrote: > 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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