The STAR experiment

1) Possible merging of JetCorr and HF PWGs

Conclusions: generally positive feedback from PWG members so far. Conveners are trying to gather more comments from active members who were not able to join this week's PWG meetings. If no strong objections raised, we will proceed with the merging in the near future. 

2) Discussion on forward detector triggering in Au+Au

Conclusions: most of PWGs are fine with reading out forward detectors without triggering on them in Au+Au running. Couple of ideas on triggering were raised, and conveners will follow up with the proponents. 

3) Embedding request for Run19 14.6 GeV (intended for sQM)

• 1 embedding request each for K+, K-, pi+, and pi-
• run 19 Au+Au BESII
• 14.5 GeV (P21ic, production_14p5GeV_2019)  
• Minbias Triggers: 650000
• -70cm < Vz < 70cm and Vr < 2cm  
• 0-80% Centrality  
• 5% refmult particles embedded in each event  
• Uniform in Rapidity: [-1.5,1.5]  
• Uniform in pT: [0.0,5.0]
• Uniform in phi: [0,2π]
• 1.5M Events

Conclusions: will increase the vz range to |vz| < 150 cm and increase the statistics by a factor of 2 accordingly. Will also add protons/anti-protons such that these embedding samples can be used by more analyses. The embedding requests will be made of high priority since it is aimed for sQM.

4) Collect preliminary figures (ARXIV)

Conclusions: it turned out that it is quite difficult, if not impossible, to upgrade Drupal for STAR given the large volume of contents accumulated in the past 20+ years. Therefore, a central repository for preliminary figures on Drupal is unlikely. We will continue the following practice: i) for any new preliminary results, PA should create a Drupal blog page to host the preliminary figures (in pdf format) and preliminary request slides; ii) conveners collect links to these Drupal pages and put them in a central place (ARXIV)

Proposal page: https://drupal.star.bnl.gov/STAR/blog/dshen/observation-charge-dependent-flow-and-its-implication-electron-magnetic-field-auau-200gev

Proposal page: https://www.star.bnl.gov/protected/heavy/shenghui/web/HFE_production_AuAu/

Proposal page: https://drupal.star.bnl.gov/STAR/blog/nish/Paper-proposal-200GeV-pp-collisions

• Production
  • MuDst->PicoDst conversion:
    • Run 12 pp st_physics - done, st_zerobias will be produced after QM
    • Run 18 Isobar st_hf - done
  • DAQ->MuDst->PicoDst production for Run19 200 GeV Au+Au
    • Will start soon, if not already
    • first pass to use the AuAu vertex finder; users will analyze the data to see if a second pass for UPC events is needed
    • PicoDst chain option: PicoVtxDefault PicoCovMtxWrite

1) Possible merging of JetCorr and HF PWGs

Conclusions: conveners are supportive of this proposal. The next step is to bring this up for discussion in JetCorr and HF PWGs, and seek feedback. 

2) Data production news

• Daq production
• • Run18 st_mtd, st_upc chains are ready to start
  • Run19 & 20 FXT datasets completed. Issue with eTOF. Need a reproduction of MuDst->PicoDst for Run20 FXT
  • Run19 AuAu200 done
• MuDst->PicoDst conversion
  • Run17 pp500_production, paused due to NFS storage limitation, resume soon
  • Run18 isobar st_hf completed
• Calibrations
  • Run21 Large calibration production for AuAu7.7 collisions has started
  • Run22 pp510
    • TPC space charge initial calibration, another iteration has begun

Conclusions: LFSUPC will look into Run19 200 GeV data, and decide whether a second production pass with a specific vertex finder for low multiplicity events is needed, and if so what the strategy is to carry out the second pass.

3) Discussion on forward detector triggering in Au+Au
- A followup meeting was proposed by the forward upgrade group on Apr. 26th 8:30am

Conclusions: conveners will bring this up for discussion in PWG meetings next week, and provide feedback. Such a discussion is also needed for this year's BUR, where we need to outline a concrete plan of how to run STAR in 2023-25. 

4)Work on BUR highlight section

1) Data production

• Run19 FXT: 15% done as of Wednesday. Will need a couple weeks to finish. 
• Run20 FXT: follow afterwards
• Run18 Isobar
  • st_hf: MuDst produced. PicoDst conversion to follow. What vertex algorithm to use? 
  • st_mtd: use MTD vertex algorithm for PicoDst
  • st_upc: need to provide chain options
• Run17 pp 510 GeV st_physics MuDst->PicoDst: first batch (of 16-20) completed

Conclusions:
i) HF PWG will follow up on the vertex algorithm to be used for MuDst->PicoDst conversion for Run18 Isobar st_hf stream
ii) The recommended chain options for vertexing of Run18 Isobar st_upc are: VFPPVnoCTB, beamline
iii) Cold QCD will likely finish in-depth QA of the jet tree production from Run17 pp 510 GeV st_physics within a week. Once done, will inform the production team to continue with the next batch. 

2) Missing BEMC information in PicoDst during DAQ production, which causes significant inefficiency

• Not an issue for MuDst->PicoDst conversion
• BEMC pointer deleted by some maker during DAQ production. Looking for a volunteer to investigate this very important issue. 

Conclusions: conveners will follow up on this and contact potential candidates. 

3) Put both PA's and convener's emails in the embedding request (REQUEST PAGE)

Conclusions: conveners will follow this guidance in the future. 

4) QM embedding needs (Production priority)

• 20214101 - JetCorr - Run14 AuAu 200 GeV - Pythia 8 HF jet - Under preparation
• 20214201-06 - LFSUPC - Run19 AuAu 19.6 GeV - pi/k/p - Test samples produced 
• 20214001-08 - LFSUPC - Run19 AuAu 19.6 GeV - strangeness - Test samples produced 
• 20214207-16 - LFSUPC - Run18 Isobar 200 GeV - d/t/He3 - Done 
• 20214217-24 - LFSUPC - Run18 Isobar 200 GeV - electron/positron - Test samples produced 
• 20215101-05 - HF - Run18 Isobar 200 GeV - Jpsi and Upsilon - Finishing MB; HT events to follow
• To come - LFSUPC - Run19 AuAu 19.6 GeV - light nuclei

Embedding updates from Xianglei: SLIDES

Conclusions:
i) LFSUPC PWG will follow up on light nuclei embedding request for Run19 AuAu 19.6 GeV.
ii) It is highly recommended that people go through Xianglei's report at this week's S&C meeting, where two topics are discussed: Run17/18 embedding improvements and Run19 19.6 GeV embedding issues. 

5) Embedding requests
- Are the following still needed?

• 20180201: He3 in AuAu 39 GeV, reproduction
• 20185201, rh0, f0, f2, omega, eta in Run17 AuAu 54 GeV
• 20203002, Ks/Lambda/AntiLambda in Run14 AuAu200 GeV HFT
• 20203003, pentaquark in Run14 AuAu 200 GeV HFT

Conclusions: LFSUPC PWG will follow up on this, and hopefully come to a conclusion in 1-2 weeks. 

Proposal page: https://drupal.star.bnl.gov/STAR/blog/clhu/hyper-nuclei-collective-flow-v1-3-gev-au-au-collisions-rhic

1) QM abstracts decision (QM2022)
- 21 parallel talks + 1 plenary talk
- Please comment on and approve merged abstracts promptly. Need to send back to organizers by Feb. 5th
- pre-QM meeting
-- online (organized by AGH University of Science and Technology)
-- March 22nd - April 1st: 9 business days
-- 3 rehearsals between 9 am - 12 pm BNL time each day
-- Extra time for possible re-rehearsals

Conclusions: 
- PWGs should also organize their own rehearsals before the collaboration-wide rehearsal. 
- Speaker selection will be carried out independent of whether candidates plan to go to QM in person or not. Once selected, it is up to the speaker to decide whether he/she will go in person. Management does not have any preference or policy.

2) QM embedding needs (Production priority)

• 20214101 - JetCorr - Run14 AuAu 200 GeV - Pythia 8 HF jet - Under preparation
• 20214201-06 - LFSUPC - Run19 AuAu 19.6 GeV - pi/k/p - Test samples produced 
• 20214001-08 - LFSUPC - Run19 AuAu 19.6 GeV - strangeness - Test samples produced 
• 20214207-16 - LFSUPC - Run18 Isobar 200 GeV - d/t/He3 - Done 
• 20214217-24 - LFSUPC - Run18 Isobar 200 GeV - electron/positron - Zr+Zr done; next Ru+Ru
• 20215101-05 - HF - Run18 Isobar 200 GeV - Jpsi and Upsilon - Done
• 20220201-02 - FCV - Run18 Isobar 200 GeV - K* - neutral K* done
• 20220203-05 - LFSUPC - Run19 AuAu 19.6 GeV - light nuclei
• 20220206-09 - LFSUPC - Run19 AuAu 14.6 GeV - proton light nuclei

Conclusions: LFSUPC will submit Run19 AuAu 14.6 GeV pi/k/p embedding request soon, which should be checked before any other embedding production at this energy

3) Recent progresses for BES-II embeddings (Xianglei's slides: 20220105, 20220127)
- Special discussion on 01/27: minutes
- Main issues resolved/mitigated. Hope to start embedding production in a week. 

Conclusions: people are encouraged to go through the slides and minutes, and report back if they have any concerns of moving forward with the BES-II embedding.

4) Upcoming collaboration meeting (Meeting page)
- Junior's Day: Feb. 14
- Parallel session: Feb. 15 - 18
- Plenary session: Feb. 21 - 25
- Council meeting: Feb. 22
- Management-convener meeting: Feb. 24 (1:30-3:00, tentative)

- Topical presentations: any topics you would recommend to be presented during the collaboration meeting? (Likely a few slots)

5) Analysis info
- Following track cuts (NHitsFit>=15, NHItsFit/NHitsPoss>=0.52) are applied during BTof matching. If one uses BTof matched tracks, these cuts are implicitly applied. 

Conclusions: all analyzers should be aware of these implicit cuts. Since these cuts are applied during data reconstruction, any changes to them require reproduction of PicoDst. 

6) WWND 2022 abstracts
- Please comment on and approve the proposed abstracts at earliest convenience

• Production
  • MuDst->PicoDst conversion:
    • Run 12 pp st_physics - ongoing, expected to finish over the weekend
    • Run 18 Isobar st_hf - ongoing
  • Data production: preparing for Run19 200 GeV Au+Au
    • dE/dx calibration ready (as good as other BES-II data set); Bichsel predictions shifted for heavier particles
    • bTOF issues with T0, expected to finish over the weekend
    • eTOF will not be included
    • first pass to use the AuAu vertex finder; users will analyze the data to see if a second pass for UPC events is needed
• Embedding
  • 20214101 - JetCorr - Run14 AuAu 200 GeV - Pythia 8 HF jet - 6M done
  • 20214201-06 - LFSUPC - Run19 AuAu 19.6 GeV - pi/k/p - Done
  • 20214001-08 - LFSUPC - Run19 AuAu 19.6 GeV - strangeness - Lambda/K0S/phi done; Xi/Omega to follow
  • 20220203-05 - LFSUPC - Run19 AuAu 19.6 GeV - light nuclei - Done
  • 20214207-16 - LFSUPC - Run18 Isobar 200 GeV - d/t/He3 - Done 
  • 20214217-24 - LFSUPC - Run18 Isobar 200 GeV - electron/positron - Done
  • 20215101-05 - HF - Run18 Isobar 200 GeV - Jpsi and Upsilon - Done
  • 20220201-02 - FCV - Run18 Isobar 200 GeV - K* - Done
  • 20220206-09 - LFSUPC - Run19 AuAu 14.6 GeV - proton, light nuclei

1) Latest news on data production

• DAQ production (Run19/20 FXT done)
  
  • production_13p5GeV_fixedTarget_2020 => 5644 / 5644
  • production_5p75GeV_fixedTarget_2020 => 4766 / 4868
  • production_7p3GeV_fixedTarget_2020 => 6004 / 6005
  • production_19p5GeV_fixedTarget_2020 => 6068 / 6068
  • production_31p2GeV_fixedTarget_2020 => 6204 / 6204 
  • production_9p8GeV_fixedTarget_2020 => 7847 / 7847
• QM embedding needs
  • 20214101 - JetCorr - Run14 AuAu 200 GeV - Pythia 8 HF jet - Under preparation
  • 20214201-06 - LFSUPC - Run19 AuAu 19.6 GeV - pi/k/p - Done
  • 20214001-08 - LFSUPC - Run19 AuAu 19.6 GeV - strangeness - Lambda/anti-Lambda/K0S done; others to follow
  • 20220203-05 - LFSUPC - Run19 AuAu 19.6 GeV - light nuclei - Producing Deuteron
  • 20214207-16 - LFSUPC - Run18 Isobar 200 GeV - d/t/He3 - Done 
  • 20214217-24 - LFSUPC - Run18 Isobar 200 GeV - electron/positron - Done
  • 20215101-05 - HF - Run18 Isobar 200 GeV - Jpsi and Upsilon - Done
  • 20220201-02 - FCV - Run18 Isobar 200 GeV - K* - Done/
  • 20220206-09 - LFSUPC - Run19 AuAu 14.6 GeV - proton, light nuclei
• MuDst->PicoDst production priority (Production Priority)
  • Run 12 p+p dataset

Conclusions:
- Analyzers should look through the produced embedding samples and report back if they found issues or statistics is insufficient
- Will consult production team about the time needed for Run17 and Run12 st_physics MuDst->PicoDst conversion, and decide whether it makes sense to reverse the priority

2) Upcoming collaboration meeting (Meeting page)
- Junior's Day: Feb. 14
- Parallel session: Feb. 15 - 18
- Plenary session: Feb. 21 - 25
- Council meeting: Feb. 22
- Management-convener meeting: Feb. 24 (1:30-3:00): call for inputs
- PWG reports: Feb. 25: please provide speaker name

3) Pre-QM rehearsal
- Plenary session: March 22nd - April 1st, 9 am - 12 pm BNL time, 3 rehearsals per day
- PWG rehearsal: up to each PWG to organize; could be the week before or in the afternoons of the plenary session

Conclusions: in rare cases, multiple presenters are allowed for a poster as per our publication policy, which can be justified if it is needed for people to attend the conference.

4) Input for 2023+25 running strategy
- How can we achieve our MB (20B) and luminosity (62 nb^-1) goals? Do we run the two programs separately or concurrently?

5) Upcoming conferences

• DIS 2022, May. 2 - 6, abstract due Feb. 13th, https://indico.cern.ch/event/1072533/ (9 abstracts proposed)
• SQM 2022, Jun. 13 - 17, hybrid, abstract due Mar. 15th, https://indico.cern.ch/event/1037821/
• INPC 2022, Sep. 11 - 16, abstract due Mar. 15th, https://inpc2022.org/