Kun's weekly group discussion

Wednesday 13 Dec 2023, 13:30 → 15:00 Asia/Shanghai

Tsung-Dao Lee Institute/N5F-N530 - Discussion Room (Tsung-Dao Lee Institute)

13:30 → 14:00 DarkSHINE tracker, analysis and simulation

13:30 Tracking detector R&D

Speaker: Kang Liu

The ground wire and four office chairs have arrived. After the grounding construction is completed, the IV and CV tests can be started.

13:40 Tracking reconstruction

Speaker: Junhua Zhang

20231212-Junhua.pdf

To do:

1. Change the magnetic field, keep other information unchanged, and look at the trend of reconstructed momentum (the change is expected to be obvious).
    
2. After the parameterized translation is completed, directly sort out all the processes of the algorithm.
    
3. Truth needs to add some variables to store all the charged particles in the recoil region. It is expected to record more than DTruth.

13:50 Simulation and analysis

Speaker: Yufeng Wang (TDLI)

baseline1.6:

• production:
  • signal samples done with correct track momentum reconstruction
  • rare background processes: reconstruction pending
• validation:
  • signal efficiency drops significantly with dark photon mass,
    • mainly due to reco. track number cuts
      • more reco. track number = -1: too many (>20) or few (<4) hits for reconstruction ("-1" is new in 1.6)
      • more reco. track number =0: reconstruction failure
    • turning on track fitting algorithm doesn't change reco. track number --> why?
    • impact from geometry & filter: might change the distribution of hits per layer. Generated a few 1 MeV/ 1 GeV signal samples, validating.

14:00 → 14:30 ATLAS performance and physics

14:00 ttW/ttH -> multi-leptons analysis

Speaker: Jialin Li

1. Redo the fit with the new MVA-variables injection.
2. Help the group to generate the small ntuples.
3. Got the 3l's ntuple and submitted the jobs of multi-fit. (will be finished this week)

14:10 Electron/photon performance, H->Zgamma and gg* analysis

Speakers: Danning Liu (TDLI/SJTU), Kang Liu, Rui Yuan (SJTU)

Kang :

I have run though the H2ZG framework in rel21. Next I need to run on rel24 and try event selection.

 

Danning : 

gave a presentation on MC validation of Run3 Hy*y analysis on HGam meeting 

https://indico.cern.ch/event/1356730/

Keep working on HGamGamStar Migration

14:30 → 14:50 Round table

Speakers: Mr DIAN YU (Tsung-Dao Lee Institute), Lin Yang (TDLI), Zhiyang Dai