The STAR experiment

STAR PWGC meeting

Updated on Fri, 2020-10-02 15:32. Originally created by marr on 2020-09-16 08:14.

Start: 2020-10-02 09:30

Timezone: America/New York

Friday, 2 October 2020
https://bnl.zoomgov.com/j/1619294511?pwd=TkRhZzFjOWZSQnpvUVdGUGFVMmlHdz09, at 13:30 (GMT), duration : 00:00

1) Paper preview: Measurement of inclusive electrons from open heavy flavor hadron decay in p+p collisions at √s= 200 GeV with the STAR experiment

- Brief introduction from the PWG conveners (5’) [Barbara]

- Paper proposal (15') [Presentation]

- Open discussions (35')

- Summary from the conveners' panel (5’)

Proposal page: https://www.star.bnl.gov/protected/heavy/shenghui/web/HFE_production_pp/
Analysis note: https://www.star.bnl.gov/protected/heavy/shenghui/web/HFE_production_pp/note/pp_HFE_anaNote_v0.pdf

NOTES

2) Feedback for running collider mode during CeC with single beam energy 26.5 GeV/u
- Run 20: 300M fixed-target data during CeC
- Au+Au @ 53 GeV: in 2017, we took 800 M events parasitically during 3-week of CeC running. In Run 21 and 22, PAC approved 2+2 weeks of CeC. We now have iTPC, eTOF, EPD, which were not there in 2017.

Conclusions: in 2017, we took 54.4 GeV data for 3 weeks continuously and CeC is running parasitically with STAR data taking. In 2020, CeC was running in chunks of 16 hours, and they dictate the schedule. Therefore, Run20 event counts is probably a better guidance since CeC in Run21 and 22 will be run similarly to Run20. In sprit of this, it is probably more realistic to use 300M+300M events as a guidance for the next two years of running along with CeC. Precise projection is difficult since CeC has a higher priority.
FCV: interests expressed for both fixed-target and collider running even though there is slightly more interest in collider mode
HF: 53 GeV data would allow to measure Raa and v2 for Jpsi and HF electrons with the additional detectors
LFSUPC: collider data will push spectrum measurements to lower pT while more fixed-target data will benefit for example hyper-nucleus studies.
PWGs will continue the discussion in the coming week.

3) Call for volunteers
- Task force for tuning PYTHIA8 (HF, JetCorr, SPIN)
- Task force for evaluating tracking efficiency uncertainty (1 per PWG if interested)
- Plan to set up mailing lists for task forces, so people who are not in the task force but interested in the discussion can subscribe.

Conclusions: conveners will bring this call to PWGs

4) Upcoming conferences:

- AUM Oct. 22-23
- DNP Oct. 29 - Nov. 1: please remind presenters to give regular updates if they want to show new results and send talks to PWG 2 weeks (Oct. 15) before the conference starts and to star-talks 1 week before (Oct. 22)

STAR PWGC meeting

Updated on Fri, 2020-12-04 14:15. Originally created by marr on 2020-09-16 08:14.

Start: 2020-12-04 09:30

Timezone: America/New York

Friday, 4 December 2020
https://bnl.zoomgov.com/j/1619294511?pwd=TkRhZzFjOWZSQnpvUVdGUGFVMmlHdz09, at 14:30 (GMT), duration : 00:00

1) Paper preview: Measurement of φ-meson Production in Au+Au Collisions at √sNN= 3.0 GeV

- Brief introduction from the PWG conveners (5’) [Daniel Brandenburg]

- Paper proposal (15') [Presentation by Guannan Xie]

- Open discussions (35')

- Summary from the conveners' panel (5’)

Proposal page: https://www.star.bnl.gov/protected/heavy/xgn1992/paper/phi3GeV/proposal/

NOTES

2) Organizational news
- Cold QCD
-- Incoming co-convener: Qinghua Xu, Maria Zurek
-- Outgoing co-convener: Carl Gagliardi

- LFSUPC
-- Incoming co-convener: Md. Nasim
-- Outgoing co-convener: Wangmei Zha

3) Agenda for analysis meeting: TENTATIVE AGENDA

Conclusions: conveners generally agree with the tentative agenda.

4) Data production discussions: priority
i) Discussion of production priority for Run19-20 data sets
ii) New request: pp500_production_2013, P14ia, st_physics and st_physics_adc, MuDst
- Run list: /star/u/agibson/2013Pi0s/2020-December-Run13PeriodWishList.txt
iii) Isobar embedding
- Request page: 20201503
- Details:
-- pi+/K+/p and pi-/K-/anti-p/in 200 GeV Run18 Isobar (half Zr+Zr/ half Ru+Ru) MB
-- Number of events: 14M (5M for each for pi+, pi- and 1M each for K+/K- and proton/antiproton) for pT=[0-5] + 30k (for all particles) for pT=[5-20] GeV
-- which would be a total of 14180000 events.
-- No split in centrality - embedding in minbias data

Conclusions:
i) Discussions about the production priority are ongoing among interested PWGs
ii) Since the requester might only have manpower in the next two months, it was agreed that the request will be put at a high priority
iii) LFSUPC PWG will check whether the embedding request put forward by the JetCorr satisfies their needs

5) HLT express production of PicoDst files for Run19 and Run20. What data sets do we want to keep? A complete list can be found here: LIST

Conclusions: it was agreed upon that 10% of each dataset and 100% of a few selected dataset will be kept on RCF. For the latter, a list of such datasets will be proposed by interested PWGs.

STAR PWGC meeting

Updated on Fri, 2020-11-20 13:16. Originally created by marr on 2020-09-16 08:14.

Start: 2020-11-20 09:30

Timezone: America/New York

Friday, 20 November 2020
https://bnl.zoomgov.com/j/1619294511?pwd=TkRhZzFjOWZSQnpvUVdGUGFVMmlHdz09, at 14:30 (GMT), duration : 00:00

1) Centrality issue for high-rate 200 GeV Au+Au data sets SLIDES

Conclusions: Jiangyong presented studies of a potential issue in using refMult or gRefMult as the centrality classifier. The issue arises from low TPC tracking efficiency in high occupancy events, which can artificially shift central events to mid-central centrality class, and so on. This potential issue could be present in all 200 GeV Au+Au data sets beyond 2010. PWGs are suggested to follow up on this issue and assess potential impacts on published and ongoing analyses.

2) HLT express production of PicoDst files for Run19 and Run20. A complete list can be found here: LIST

Conclusions: for the purpose of establishing codes and exploring new physics, the convener panel suggests to save 10% of all datasets and 100% of a few selected datasets. The latter will be discussed further.

3) Data production (priority list)
- Daq: Isobar production expected to be finished in ~ two months
- MuDst->PicoDst: add 2010 AuAu 200 and 2012 UU 193 GeV to the list

Conclusions:
- It was suggested to add some trigger data information to PicoDst files when producing 2010 AuAu 200 GeV and 2012 UU 193 GeV datasets, as they are needed for some analyses. Analyzers will get in touch with Grigory about what quantities need to be added.
- LFSUPC, CF and FCV PWGs will revisit the production priority list for Run19-20 BESII datasets

4) Analysis meeting
- Time: January 6-8 (Wed-Fri), 9-11 am BNL time
- Format
-- Jan. 6-7: 8 talks, 30 minute each, for cross-PWG topics
-- Jan 8: PWG reports or highlights of an analysis by a member, 20 minutes each.

Conclusions: conveners generally agree with the proposed time and format. PAC will work on the agenda.

5) Feedback
- Efficiency correction issue in off-diagonal cumulants
- Proton feed-down for BES-I baryon number ratio vs. collision energy

Conclusions:
- The issue in efficiency correction has been understood by the PAs. New correction procedure is developed and presented to PWG. Currently working on the systematic uncertainties. PAs will write an erratum for the paper.

- PAs have done estimating the proton feed-down contribution based on published Lambda spectrum for 39 GeV. They will continue to work on other collision energies. The UC Davis group also started to work on this topic to provide independent cross-check.

6) Upcoming conferences

sQM 2021, May 17-22, abstract due Jan. 31th (tentative)
APS 2021, April 17-20, abstract due Jan. 8th, online: https://april.aps.org
DIS 2021, April 12-16, abstract due Feb. 1st, online: https://indico.bnl.gov/event/9726/
CPOD, 2021 March, online
Initial Stages, 2021 Jan. 10-15, online: https://indico.cern.ch/event/854124/

STAR PWGC meeting

Updated on Fri, 2020-11-13 13:03. Originally created by marr on 2020-09-16 08:14.

Start: 2020-11-13 09:30

Timezone: America/New York

Friday, 13 November 2020
https://bnl.zoomgov.com/j/1619294511?pwd=TkRhZzFjOWZSQnpvUVdGUGFVMmlHdz09, at 14:30 (GMT), duration : 00:00

1) Paper preview: Disappearance of partonic collectivity in sqrt(sNN) = 3.0 GeV Au+Au collisions at RHIC

- Brief introduction from the PWG conveners (5’) [ShinIchi]

- Paper proposal (15') [Presentation by Shaowei Lan]

- Open discussions (35')

- Summary from the conveners' panel (5’)

Proposal page: https://www.star.bnl.gov/protected/bulkcorr/slan/FXT3gev/paperProposal/shortPaper/

NOTES

2) HLT express production of PicoDst files for Run19 and Run20. A complete list can be found here: LIST

Conclusions: CF and FCV PWGs will follow up on the discussion

3) Data restoration request (Production priority)
- production_pp200long2_2015, P16id_SL19c, st_ssdmb
- production_pAu200_2015, P16id, st_himult, MuDst

Conclusions: new requests will be restored with high priority

4) Analysis meeting
- How about mid December or early January, 2-3 hrs in the morning with plenary session only?

Conclusions: conveners generally support the idea. Will continue discussing the format and date

STAR PWGC meeting

Updated on Fri, 2020-11-06 11:08. Originally created by marr on 2020-09-16 08:14.

Start: 2020-11-06 09:30

Timezone: America/New York

Friday, 6 November 2020
https://bnl.zoomgov.com/j/1619294511?pwd=TkRhZzFjOWZSQnpvUVdGUGFVMmlHdz09, at 14:30 (GMT), duration : 00:00

1) HLT express production of PicoDst files for Run19 and Run20. A complete list can be found here: LIST
- Need discussion: a request of 100T disk space on RCF to host them. Are PWGs interested in analyzing these data?
- They are currently hosted on pwg_task (30T) and HLT machine (70T). The disk space on HLT machine needs to be freed to support 2021 running.
- These data were produced online with sub-optimal calibration, so cannot be used for preliminary or final physics results
- If granted, the 100T likely needs to come from RCF disk space that is currently used for data production. This will mean less buffer space and possibly more interruptions.

Conclusions: it was suggested by several conveners to keep only a fraction of the express production on disk to be used by analyzers. CFV and CF PWGs will bring up this topic for discussion in their weekly meetings next week. Currently, 30T of such production reside on pwg_task disk (/gpfs01/star/pwg_tasks/tfg02) and can be accessed by analyzers.

2) Small system event activity meeting: Nov. 10th 10am - 12pm

3) Isobar production has started last week. Run17 pp 510 GeV production paused.

4) Remove data on pwg_tasks
- "2016 AuAu200 FMS miniTree": green light from HF
- "2015 Jet ALL embedding private production": feedback from Cold QCD?

Conclusions: "2016 AuAu200 FMS miniTree" will be removed from pwg_task disk. ColdQCD conveners will follow up on the removal of the 2015 Jet ALL private embedding sample.

5) MuDst and PicoDst replacement. Please respond before Nov. 9th.

i) The following old PicoDst production will be replaced with new ones

- AuAu_200_production_2016, P16ij_SL18f, st_physics

- AuAu_200_production_2016, P16ij_SL16j , st_physics

- AuAu_200_production2_2016, P16ij_SL16j, st_sst, st_nosst

- AuAu54_production_2017, st_physics, P18ic_SL18c. A slight difference was found between SL18c and SL20c originating from different vertex selection algorithm used: SL18c (Default) vs. SL20c (VpdOrDefault)

ii) Replace MuDst with PicoDst
- AuAu200_production_2011: 92% of PicoDst (SL19c) available on DD

Conclusions: no objections raised so far. We will proceed with the replacement and removal starting from Nov. 9th.

Decipher the R observable (STAR Collaboration meeting 2020 Sept)

Updated on Wed, 2020-09-16 07:39. Originally created by fengyich on 2020-09-16 07:39.

fengyich's blog

Joint Test on Pentagon Prototype

Updated on Wed, 2020-09-16 05:02. Originally created by yshi on 2020-09-16 05:02.

Reference

Meeting : STAR forward sTGC meeting

Speaker : Feng Li

Talk time : 08:15, Duration : 00:20

AOB

Updated on Tue, 2020-09-15 18:15. Originally created by dongx on 2020-09-15 18:15.

Reference

Meeting : S&C Management Meeting

Talk time : 11:20, Duration : 00:15

- production status
- collaboration meeting

3GeV Direct Proton Flow

Updated on Wed, 2020-09-16 21:54 by sesumi. Originally created by jjiastar on 2020-09-15 14:40.

Reference

Speaker : Edwin Duckworth

Talk time : 16:00, Duration : 00:20

Jet fragmentation function - Run 14 BEMC calibration

Updated on Thu, 2020-09-17 08:29 by hanseul. Originally created by elayavalli on 2020-09-15 12:46.

Reference

Speaker : Saehanseul Oh

Talk time : 10:00, Duration : 00:30

Femtoscopy in small systems

Updated on Thu, 2020-09-17 08:57 by yuno. Originally created by sesumi on 2020-09-15 12:21.

Reference

Speaker : Eugenia Khyzhniak

Talk time : 11:30, Duration : 00:20

Jet Shape analysis update

Updated on Thu, 2020-09-17 09:47 by jmazer19. Originally created by elayavalli on 2020-09-15 12:20.

Reference

Speaker : Joel Mazer

Talk time : 11:00, Duration : 00:30

JetCorr parallel session #3

Updated on Tue, 2020-09-15 12:15. Originally created by elayavalli on 2020-09-15 12:15.

Time	Talk	Presenter
10:00	Jet fragmentation function - Run 14 BEMC calibration ( 00:30 ) 1 file	Saehanseul Oh
10:30	Inclusive jets in pAu ( 00:30 ) 1 file	Tong Liu
11:00	Jet Shape analysis update ( 00:30 ) 1 file	Joel Mazer