Resources needed for rapid analysis of W events from 2009 pp 500 GeV run
(relay only RCF resources)

Updated 16 April 2009 (UTC)

Primary goal is publication of W xsection. Approaching conferences do not define deadlines for intermediate results.
We will work first on sufficient quality calibration.
If final TPC tracking accuracy is not adequate we will not publish separately W+ vs. W- .

  1. real events data sets , obtained ~1TB (mit+iucf+data05+06+07)
    • 1.1M L2W tagged events saved in W-stream (muDst=400GB)
    • 1.5M VPD minB events from Fill F10471 (muDst=500GB)
  2. MC events Pythia 500 GeV, geometry 2009, needs ~200GB (uky)
    • 1M filtered QCD Pythia events partPT>10 GeV/c, LT=10/pb,filter: stable particle 'cluster' ET>20 GeV, 5e8 Pythia events thrown
    • assorted rare Pythia events involving Ws, Zs, W-jets, etc, above 100/pb apiece
  3. TPC calibration needs : low lumi data set at 200 GeV 3M events (to be taken!) , 200GB disk for muDst (data07), 1-2 CPU years
    • status tables (time) , per longer runs
    • TPC: variety of corrections based on low lumi run (to be taken at pp 200 GeV) and sampled pp 500 data
    1. twist, inner/outer alignment done by STAR core team - 1 week of work according to Gene
    2. Space Charge corrections by Joe: muDst=200GB, 2.5 CPU month per pass, 3-8x iterations
    • TPC: evaluation of achieved pT resolution - 1 week
    • determine beam line constraint
    • Vertex finder QA - 1 week
  4. EMC calibrations: ~week of CPU , few weeks of FTE per detector
    • QA of runs
    • status tables (BTOW,ETOW,BSMD) , pedestals (BTOW,ETOW), per fill
    • BTOW: relative gains (per towers) from slopes from minB eve, absolute=ideal
    • ETOW: as above
    • BSMD: relative gains (per strips) from slopes from minB eve , absolute using 2008 pp calibration (done)
    • polarization related: STAR bXing, fill pattern, CNI : fill pol(time)
    • BPRS, TOF - not used unless needed
  5. CPU needs for data analysis: 2 CPU years (TPC calibration effort not included)
    • full BFC production of L2W events: (28sec/eve), 250 CPU days per pass (assume 2nd iteration may be needed)
    • real muDst analysis: 13 Hz, 1 CPU day/pass, x 20 iterations
    • MC muDst analysis: 13 Hz, 1 CPU day/pass, x 20 iterations

Approximate schedule, milestones, an estimate

  1. calibrations ~1-2 months
  2. BFC 1st production ~1 week
  3. tuning of W-cuts ~2 weeks, first W peak in ET spectrum
  4. comparison to M-C, efficiency : ~1 month
  5. (if needed) BFC 2nd production : ~1 week
  6. final analysis , preliminary cross section released : ~1 month
  7. writing paper, cleanup of analysis, draft ready for spin PWG : ~3 months
  8. comments from spin PWG, analysis : ~2 months, draft ready for GPC
  9. working w/ GPC : ~3 months, paper sent to publisher
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