The STAR experiment

• 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/

• Inclusive jet analysis note
• Dijet analysis note

-- New physics opportunity opens up for longitudinal dynamics study which is one of main reason we argue for STAR run beyond 2022. 54.4 GeV is the only energy beside 200 GeV that allow us to study the beam energy dependence (any other energy 19GeV and below would be too low for this physics).  This energy would be also valuable for the CME searches where the QGP should still be present.  sPHENIX has no plan for such energy, so that is something STAR can do uniquely. 
-- We can use this data to understand the performance and evaluate the physics potential for the 200 GeV run in sPHENIX era (The event multiplicity would be not too much lower).

Conclusions: most of the PWGs either prefer the collider mode or do not have a strong opinion. Here are details: 
HF: prefer collider mode; Raa and v2 for Jpsi and HF electrons
FCV: prefer collider mode; longitudinal dynamics, CME search
LFSUPC: prefer collider mode; dielectron, low pt spectrum, UPC physics
JetCorr: no opinion
CF: will discuss through emails

3) It was concluded that one cannot produce blinded Isobar data, as requested by ABC and GPC, on Cori. The decision is to produce Isobar data on RCF with a large fraction of CPU allocated to it. Will follow up on whether one can move Run17 pp 510 GeV production to Cori. 

Conclusions: if Run17 pp 510 GeV data production can be moved to Cori, the ColdQCD PWG prefers to pick up the latest BEMC calibration, which requires a change of chain options and maybe new production tag. This would mean that analyzers would need to analyze two productions to obtain the full statistics. If the data set will continue to be produced at RCF with reduced CPU share, they should be produced as they are now, i.e. latest BEMC calibration is not included, to avoid overhead. ColdQCD PWG would also like to submit W and Z embeddings for this dataset with high priorities. More discussions on this will follow. 

4) Timeline HepData data tables preparation
- Current: before collaboration review
- Proposal: before announcement to RHIC. PAs can prepare these data tables while waiting for collaboration comments

Conclusions: conveners agree with the proposal, which will be implemented immediately. 

5) pAu collisions: centrality, high/low event activity
- How to deal with underlying quantities: signal saturation; vz and luminosity calibration
- Can we agree upon a global procedure: BBC inner vs. outer vs. all; high/low BBC cut values; centrality definitions

Conclusions: conveners agree that this effort would benefit STAR as a whole. As a starter, a dedicated centrality meeting will be held to have overview presentations from relevant PWGs (HF, ColdQCD, JetCorr, FCV) on their current approaches, and discussions on how to move forward will take place at this meeting. Conveners also suggest such an effort to be extended to other small system collisions in general. 

6) Reminder: Call for volunteers
- Task force for tuning PYTHIA8 (HF, JetCorr, SPIN)
- Task force for evaluating tracking efficiency uncertainty (1 per PWG if interested)

Conclusions: conveners will follow up on these calls.