Page History

...

1. PPV - status of evaluation of SL09b production, missing CMB tracks
2. TPC calibration - Gene
   • when can we replay data for one fill?
3. Vernier scan update - Ross
4. BTOW calibration
   • relative is done, or ? , Joe
   • absolute : E/P using slopes & ideal gains - Matt
5. W analysis
   • Joe - updates? Close to final version to be shown on Thursday.
   • Ross -
   • Justin -
6. W paper 1 - Bernd
7. CNI polarization of protons during 500 GeV run (Data files: ): Yellow Fill dependence: and Blue Fill dependence: - Bernd
8. AOB
9. Announcements
   • Hal finished run QA for fills: 10383,10389,10399, 10402. We are done! (except ~30 runs)

September 15, 2009

Minutes
Present: Hal,Jan,Will,Ross,Joe,Bernd,Justin,Scott, Gene

1. TPC - Gene reported slewing correction for clusters is in DB. T0 should be in DB at the end of the week. Then we can ask for re-production of one fill to see if tracking efficiency improved at Z~0
2. PPV - status of evaluation of SL09b production - no report
3. Vernier scan - Ross
   • formula computing BBC xsection seems to be complete now. For a low lumi fill in pp500 the computed BBC xsection is 26mb - close to the value know for pp200
   • Q: what do we expect for BBC xsection at 500 GeV - answer is unknown
   • the linear formula can't be applied for regular fills when BBC is saturated, Hal suggested using more advanced approach counting bXings w/o rate, using zero of Poisson distribution. LINK SHOULD BE HERE
   • BHT3 x-section : results of fit with noisy patches removed Conclusion: background reduces but not vanishes. Comparison for other vernier scan will be made, estimation of error in determination of xSection due to non vanishing background will be made
4. BTOW calibration
   • relative -Joe - link , is completed. Write-up was sent to emc2-hn for comments.
   • absolute -Matt, will be performed shortly using Joe's relative gains.

5. Wiki Markup
   Understanding QCD e+/e\- ratio at ET \[15,20\] GeV - Scott.

   • Plan: use Pythia events and simplified W-algo to determine the ratio of high pT particles with positive/negative charge.
   • Manpower: not assigned.
6. Status of W analysis:
   1. Joe detailed presentation of alternative W-algo, run 9 data & M-C - link. Results are consistent with Jan's analysis. 2 independent algos leading to similar output improve confidence in the result.
   2. Jan's ver 4.2 : bug fix, upgrade, answers to questions after last week spin PWG presentation , slides
   3. Justin : using ETOW in W-algo improves S/B in ET~20 GeV region, allows background estimation for di-jets escaping through not existing East endcap.
7. Layout of paper 1: Draft: Files: Bernd
   Decisions:
   • Bernd will oversee the latex files, complete version will be posted in spin/protected/ area at THIS LOCATION
   • Assigned chapters: Intro+RHIC : Bernd; STAR : Scott; Lumi : Ross; Trigger : Jan
   • We hope to have them written by next week.
   CNI polarization of protons during 500 GeV run (Data files: ): Yellow Fill dependence: and Blue Fill dependence: - Bernd
8. Announcements
   • Hal finished run QA for fills: 10403, 10404, 10407, 10412.

...