The STAR experiment

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

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/ 

 

• 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

Proposal page: https://drupal.star.bnl.gov/STAR/system/files/LongPaperWebpage_LightNuclei_3GeV.html

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

Proposal page: https://drupal.star.bnl.gov/STAR/blog/sheppel/protonhighermoments3gev

1) Discussion of data production priority in light of QM (Priority list)
- Current status of BES-II data production

• 19.6 GeV - done
• 14.6 GeV - 80% done as of Oct. 26
• Upcoming: FXT - calibration ready; waiting for SL21d

Conclusions: the current production priority list will be followed. No change. 14.6 GeV data is expected to be finished by the end of the week.

2) Centrality for 19.6 GeV (Zach's slides)
- A positive correlation between RefMult vs. ZDCrate is observed. A cut of RefMult > 20 decreases the positive slope
- Proposal: proceed with centrality definition without applying any luminosity dependent correction. 
- People need to be extra careful when using events with RefMult < 20 as they could be contaminated by non-AuAu events

Conclusions: analyzers need to pay extra attention to those RefMult<20 events in 19.6 GeV. They are probably caused by bad vacuum in the beam pipe, which was opened for installing iTPC during shutdown. These events could potentially be identified by looking at track eta or bTOF timing information, as they are asymmetric. It was also suggested to check abort gaps. This issue should not affect other BES-II datasets.

3) BES-II run QA (Drupal page)

Conclusions: this was discussed later on at the QA board meeting, and several suggestions were received:
- Combine the two lists of variables for TPC performance into one. Replace DCA with sDCAxy, which is more sensitive to space charge calibration. Drop the redundant nHitsFit as it is sensitive to TPC RDO status, which is checked through other variables. 
- Remove bTofMult from "bTOF status" as it is redundant to bTofMatch
- Check bTofYLocal and bTofZLocal as they could also be affected by vertex positions, in addition to bTOF calibration
- Need to communicate with eTOF experts to come up with a good list of QA variables

Will identify a volunteer to develop a class for checking bad runs, which can be used by all the analyzers. 

4) MuDst to PicoDst conversion: pp500_production_2017(st_physics) with SL21d
- Chain option: latest BEMC calibration, start-less TOF (w.r.t. the default vertex)
- Point of contact for jet tree production: Ting Lin

Conclusions: PWGs will discuss the chain options and come back. One point to keep in mind is that bTOF PID variables are always calculated w.r.t. the default vertex, i.e. the one with highest ranking.

5) How to treat erratum on arXiv 
- Add a comment about the erratum and major changes in the abstract
- How to update the paper?

• Update the original paper incorporating erratum
• Attach the erratum to the beginning of the original paper
• Attach the erratum to the end of the original paper

Conclusions: after the erratum is published, either incorporating the erratum into the paper or attaching it to the paper is fine. We will try to incorporate the erratum first. If this requires too much work, will attach the erratum to the beginning of the original paper such that on one will miss it if they only check arXiv not journal. 

 6) Independent checks for key BES-II analyses

• No preliminary results for the following two measurements, i.e. net-proton kurtosis and light nuclei ratio NtNp/Nd2 vs. collision energy, from BES-II COL and FXT datasets will be released. Independent checks are required for these two measurement. 
• Independent checks should be carried out by two groups with independent codes. This can not be done by two analyzers from the same group even if they use independent codes. Consistencies in final results, including central values, statistical and systematic uncertainties, for all energies have to be achieved before the results can be released for publication. Necessary communications between independent groups are allowed to understand discrepancies, but exchanges of codes are prohibited.
• In case of any other analyses which intend to make discovery claims, such as existence of critical point, the independent checks outlined above need to be carried out, which can be done in parallel with the GPC process. No preliminary results will be released for these analyses as well. In case the discovery claim is to be made after preliminary release, the independent checks are still required to be performed before publication.

Conclusions: 
- Currently, the net-proton fluctuation analysis is carried out by CCNU, UC Davis, NISER, Tsukuba groups. The light nuclei ratio analysis is carried out by CCNU, UC Davis, IISER Tirupati groups.
- It was suggested to change "independent groups" to "independent institutions" to make it clear, and remove "but exchanges of codes are prohibited." which is often needed to find bugs
- It was suggested to find an independent person to join each focus group of the two key analyses, and oversee/follow the process. This independent person will be the GPC chair later on. It was also suggested to commit the codes to CVS/Git at a later stage to keep track of the changes. 
- For the last point of potential analyses making discovery claims, there were concerns about requiring complete independent checks could significantly delay the publication process. There were ideas brought up, such as asking Code QA for some checks, dealing this on a case-by-case basis, etc. We will continue this discussion. 


7) QM timelines

• Nov. 1st: initial draft to PWG on mailing list. You should present the status of your analysis to PWG soon if you plan to submit an abstract
• Nov. 1st-15th: discussion within PWG about potential merging. Once your abstract is given green light to go ahead by the conveners, please submit through the Drupal interface
• Nov. 15th: all abstracts uploaded to Drupal for official approval
• Nov. 30th: deadline to QM submission

1) MuDst to PicoDst conversion: pp500_production_2017(st_physics) with SL21d
- Chain option: latest BEMC/EEMC calibration, start-less TOF (w.r.t. the default vertex)

• picoDst PicoVtxMode:PicoVtxVpdOrDefault, TpcVpdVzDiffCut:6, PicoCovMtxMode:PicoCovMtxWrite, ImpBToFt0Mode

- Point of contact for jet tree production: Ting Lin

Conclusions: will use the default vertex for the production, and the updated chain options are:

• picoDst PicoVtxMode:PicoVtxDefault, PicoCovMtxMode:PicoCovMtxWrite, ImpBToFt0Mode

2) Discussion of QM abstracts (ABSTRACTS)
- Previous QM: 17-18 parallel talks + 1 upgrade talk + 1 plenary talk
- Discard submissions on Drupal unless the abstract is not to be merged

Conclusions:
- The guidance is to merge the proposed ~80 abstracts to ~30. Conveners will discuss and come up with a list of merges by Tuesday next week. 
- For merged abstracts, if the PAs can decide on the speakers, non-speakers can submit their abstracts as posters. Otherwise, they need to either write generic poster abstracts with presenters to be decided later on or not submit poster abstracts. This is different from conference suggested merges, in which case non-speakers' abstracts are usually accepted as posters. 
- Talks and posters of undecided presenters will be submitted centrally to QM by PAC, while all other posters will be submitted by presenters themselves to QM

Proposal page: https://drupal.star.bnl.gov/STAR/blog/slhuang/long-prc-paper-small-system-flow

1. QM 2022 (LIST)

• Datasets and embedding needs

Conclusions: conveners will double check the track number assigned to each abstract. Conveners will also start to comment on abstracts, and discuss with PAs who have not submitted their abstracts. 

2. Analysis meeting (Dec. 6th - 8th, TENTATIVE AGENDA)