Task forces

 

STAR TPC DAQ improvement task force

02/08/2022

We would like to form the STAR TPC DAQ improvement task force. With the firmware changes on the TPC electronics, it is possible for us to double the TPC electronics readout rate with a minimal cost. This will greatly enhance STAR physics capability. Our past Beam Use Request has taken the planned upgrade into account.  The long shut down anticipated after Run 22 provides us an opportunity to do the firmware change and evaluate the impact for physics data analysis. The task force is charged to evaluate the readiness of the TPC DAQ improvement for Run 23 and beyond:

 

  1. What are the resources required to realize DAQ improvement?
  2. Where is the bottleneck for this upgrade? What are the risks?
  3. What software changes (online and offline) are required to accommodate the upgrade?
  4. What hardware and network changes are required to handle this upgrade?
  5. Evaluate the impact of proposed changes on physics capabilities.
  6. What is the timeline and path toward completion of this upgrade? 
  7. Report to management regularly and provide input to beam use request for Run 23 and beyond.

 

The members are:

Flemming Videbaek (co-Chair)

Richard Witt (co-Chair)

Zhenyu Chen

Xin Dong

Yuri Fisyak

Carl Gagliardi

Jeff Landgraf

Tonko Ljubicic

Chun Yuen Tsang

Gene Van Buren

Tracking Efficiency Uncertainty

 Tracking efficiency uncertainty drupal page

Tuning PYTHIA8

Organization

=========================
Chair: Matthew Kelsey (mkelseyATwayne.edu)
Members: Raghav Kunnawalkam Elayavalli, Hanseul Oh, Yuanjing Ji, Jan Vanek, Qian Yang, Zilong Chang
Ex Officio: Jason Webb

 Charge
=========================
Study PYTHIA8 event generator to attempt to determine a tune that better matches available RHIC data. Produce a writeup documenting these studies, results, and a "STAR tune" set of parameters. An initial report is expected in 3-6 months, and the final document in 6-12 month


Paper
=========================
Final for submission v6
Latest Paper draft during STAR review v5
Old -- v4, v3,v2
Paper draft (internal) v1 


Github with Settings and RCF Instructions
=========================
https://github.com/mjk655/DetroitTuneOnRCF


 Mailing list
=========================
A dedicated mailing list is created: star-tf-tunepy-l@lists.bnl.gov
Subscription page: https://lists.bnl.gov/mailman/listinfo/star-tf-tunepy-l 
 
Meetings (Wed. @ 3 PM BNL Time)
=========================
11/06/2020:
Zilong Chang: STAR PYTHIA6 Tune drupal.star.bnl.gov/STAR/system/files/starpythia6.pdf
Raghav Elayavalli: Quick Look at PYTHIA 8 Tune drupal.star.bnl.gov/STAR/system/files/pythia8_tune_quick_look_v0_0.pdf

12/2/2020:
Matt Kelsey: RIVET task list and introductory pointer drupal.star.bnl.gov/STAR/system/files/Kelsey_Pythia8Tune_2Dec2020.pdf


1/6/2021:
Matt Kelsey: STAR Analysis Meeting Report drupal.star.bnl.gov/STAR/system/files/Kelsey_Pythia8Tune_CollabMeeting_6Jan2021.pdf

1/20/2021:
Minutes: drupal.star.bnl.gov/STAR/system/files/Minutes_1_20_21.pdf

2/24/2021:
Yuanjing Ji: Update on identified spectra RIVET analysis: https://drupal.star.bnl.gov/STAR/system/files/pythiatune0223.pdf
Matt Kelsey: Update on Professor status and first pass at tuning https://drupal.star.bnl.gov/STAR/system/files/Kelsey_Pythia8Tune_24JFeb2021.pdf


3/10/2021:
Matt Kelsey: STAR Collaboration Meeting Report drupal.star.bnl.gov/STAR/system/files/Kelsey_Pythia8Tune_CollabMeeting_10Mar2021.pdf

4/28/2021:
Zilong Chang: Comparisons of 510 GeV jet spectra with different PYTHIA versions+PDFs https://drupal.star.bnl.gov/STAR/system/files/Pythia8tune_pp510.pdf

4/28/2021:
Zilong Chang: Studies of using MB vs. partonic bins for tuning exercise: https://drupal.star.bnl.gov/STAR/system/files/Pythia8tune_200pip.pdf
Matthew Kelsey: Variations in tunes: https://drupal.star.bnl.gov/STAR/system/files/Kelsey_Pythia8Tune_19May2021.pdf

5/5/2021:
Zilong Chang: %10 GeV jet studies with tuned MPI and ISR variations: https://drupal.star.bnl.gov/STAR/system/files/Pythia8tune_pp510_isr.pdf

5/26/2021:
Manny Rosales: Studies of feed-down contributions to forward identified spectra: drupal.star.bnl.gov/STAR/system/files/BRAHMS_Invariant_CrossSection%28Pion-Kaon-Proton%29_2M_SFT_NONDIFFRACTIVE.pdf

6/2/2021:
Matt Kelsey: Various tune updates/Z0->ee RIVET/Points for outside discussions: drupal.star.bnl.gov/STAR/system/files/Kelsey_Pythia8Tune_2June2021.pdf

====================================================================================================

Tuning observables
=========Legend===========
Green = RIVET done and tested
Red    = RIVET needs work/testing
Black = No current RIVET/HepData available
=========================

Mid-rapidity:
 - Single particle spectra + proton/pion ratio (https://arxiv.org/pdf/0808.2041.pdf, https://www.hepdata.net/record/ins930463)
- Jet mass (paper in collab.-wide review)
- Jet sub-structure (https://arxiv.org/pdf/2003.02114.pdf)
- Underlying event (https://arxiv.org/pdf/1912.08187.pdf)
- Drell-Yan (https://arxiv.org/pdf/1805.02448.pdf Tables XII + XIII) RIVET: PHENIX_2019_I1672015
- Preliminary jet cross section @ 200 GeV

Heavy Flavor:
- Open Charm spectra (https://arxiv.org/pdf/1204.4244.pdf, https://arxiv.org/pdf/1404.6185.pdf)
- Heavy flavor decayed electron pt spectra (https://arxiv.org/pdf/1102.2611.pdf, https://arxiv.org/pdf/1102.2611.pdf)

p+p @ 510 GeV:
- Jet cross section (https://drupal.star.bnl.gov/STAR/blog/zchang/run12-pp510-jet-cross-seciton-preliminary-plot)
- Z pT spectrum (https://drupal.star.bnl.gov/STAR/files/Fazio_DNP_Fall_OCT2020_v6.pdf)

Forward Physics:
- Charged particle rapidity dependence (https://arxiv.org/pdf/1011.1940.pdf)
- p/K/pi spectra at forward rapidities (https://arxiv.org/pdf/hep-ex/0701041.pdf)
- Identified hadron cross-section (https://arxiv.org/pdf/0908.4551.pdf)
- Proton/Pion ratio (https://arxiv.org/pdf/0910.3328.pdf)
- Drell-Yan (https://arxiv.org/pdf/1805.02448.pdf Tables XII + XIII) RIVET: PHENIX_2019_I1672015
- Jet energy @ 500 GeV (https://www.sciencedirect.com/science/article/pii/S0370269315007522?via%3Dihub)
- Forward pi0 cross section vs. leading pion energy (PhysRevLett.92.171801)
====================================================================================================
Working Git repository
Contact Matt for access.
====================================================================================================
Useful links
=========================
 Professor: https://professor.hepforge.org/, main paper reference https://arxiv.org/pdf/0907.2973.pdf
Apprentice: https://iamholger.gitbook.io/apprentice/, new paper: https://arxiv.org/pdf/2103.05748.pdf
CMS HERWIG 7 tuning: https://arxiv.org/abs/2011.03422
CMS PYTHIA 8 UE Tune: https://arxiv.org/pdf/1903.12179.pdf
CMS PYTHIA 8 pT0Ref Energy Dependence: https://arxiv.org/pdf/1801.02536.pdf
LHCb PYTHIA 8 Tune Details: https://journals.aps.org/prl/supplemental/10.1103/PhysRevLett.123.232001/Supplemental.pdf
ATLAS PYTHIA 8 Tunes: https://inspirehep.net/literature/1197134
Forward PYTHIA 6 Studies: https://www.star.bnl.gov/~eca/INFO/Pythia-pi0-directGamma.pdf