sPHENIX discussion of physics

["Huang, Jin" <jhuang AT bnl.gov>]

 

 

Physics potential before the final TPC calibration - Joe Osborn

 

There are 3 types of distortions in the TPC

• Static distortions - O(cm) (calibrated with laser system)

• Beam induced - O(mm) (determined with TPOT)

• Fluctuations - O(100s μm) (calibrated with laser system)

 

With 500um smearing, tracking efficiency tanks at high pT, good momentum scale, and noticeable worse resolution

 

Marzia/Tony: MVTX alignment is critically important. Study on-going

Jin: bias in the sample due to efficiency. Blow up the covariance. 

Jin: performance

Tony: caution in monotonic systematic shifts

 

 

EvtGen update - Zhaozhong Shi

 

Good progress

TODO: Check memory leaks and coding checks

 

 

DNP talk dry run - Zhaozhong Shi

https://meetings.aps.org/Meeting/DNP22/Session/LF 

 

Cameron: add references to all plots

Jin: Reduce introduction in coordination with Ming's talk before 

Sasha: (have) sent polished Electron ID plots 

Marzia: make the summary concise for such a short talk

 

 

 

D0 jet - Antonio Carlos Oliveira da Silva

 

Dennis: how likely to have shared tracks for two D0 candidates?

Antonio: problematic issue in ALICE, TBD for RHIC

Cameron: we have the infrastructure to quantify such probability from the KFParticle_sphenix package

Jin: In the case of shared tracks, would one entry or two enter the D0-jet histograms? 

Antonio: two entry

 

Xuan/Dennis: was truth D0 matching used?

Antonio: yes, via D0 ancestry tracing

Jin: was the pile-up pp collision track excluded from this analysis? That includes out-of-time pile-up and in-time pile-up collisions. 

Jin/Joe: Please double check pp flag in production

 

Dennis/Jin: why FF peak at 1? 

Cameron: Pythia configuration. https://github.com/sPHENIX-Collaboration/calibrations/blob/master/Generators/HeavyFlavor_TG/phpythia8_jets_d02kpi_MDC2.cfg

Jin: suggest checking larger R, in case softer particle leak out of the R=0.3 cone 

 

 

Reference to particle flow and track calo matching: 

Joe: Particle flow is run in this macro: https://github.com/sPHENIX-Collaboration/macros/blob/master/common/G4_ParticleFlow.C 

Dennis: This long presentation in an old Collaboration Meeting is (for better or worse) probably our best documentation on this: https://indico.bnl.gov/event/8837/contributions/39275/attachments/29202/45320/dvp-sPHENIX-CM-JSTG-7-7-20.pdf

 

 

 

______________________________

 

Jin HUANG

 

Physicist, Ph.D.

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

On Tue, Oct 18, 2022 at 10:08 PM Huang, Jin <jhuang AT bnl.gov> wrote:

Dear friends,

 

Our joint HF/Quarkonium TG meeting will be Thu at 9:30AM ET. 

 

We have the following talks on the agenda:

• Introduction: co-convenors
• Physics potential prior to the final TPC calibration: Joe Osborn
• Self intro and K0s analysis: Munir Daradkeh
• Self intro and D0-jet analysis: Antonio da Silva
• DNP talk dry run: Zhaozhong Shi

 

Please join us via:

https://indico.bnl.gov/event/17408/

https://bnl.zoomgov.com/j/1613938007?pwd=QjYzUnpYQ2xNZWZLSy9qd3Z4dFpzZz09

 

We look forward to meeting you then.

 

Best regards

 

Cameron, Jin, Tony and Marzia

 

 

 

______________________________

 

Jin HUANG

 

Physicist, Ph.D.

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

_______________________________________________
sPHENIX-physics-l mailing list
sPHENIX-physics-l AT lists.bnl.gov
https://lists.bnl.gov/mailman/listinfo/sphenix-physics-l