Shu's weekly group discussion

Wednesday 16 Sept 2026, 10:00 → 13:35 Asia/Shanghai

Tsung-Dao Lee Institute/N6F-N630 - Smart Classroom (Tsung-Dao Lee Institute)

Haidar Mas'ud Alfanda (TDLI, SJTU), Matthias Tartarin (TDLI, SJTU)

Online Zoom meeting room:

https://cern.zoom.us/j/4042031778

(PIN protected, see message from the group chat announcement)

10:00 → 10:05 Introduction & Announcements

Meeting's note: []

 

Announcements:

• A TeamShare space at jBox: https://pan.sjtu.edu.cn/web/invitation/PHaU6NjFZX
  • Click the link to join with your jAccount (internal only!)
  • Welcome to add any source that you want to share with our group members

 

---

Today's focus: 

[1st project/analysis: XXX ]:

• item 1
  • sub-item 1
  • sub-item 2
• item 2
• [...]

[2nd project/analysis: XXX ]:

• item 1
• item 2
• [...]

[...]

---

Plans: 

• [optional: indicate which project/analysis it refers to] item 1
• [optional: indicate which project/analysis it refers to] item 2

---

10:05 → 10:10 Status

Speaker: Zhijing Zhang (TDLI, SJTU)

Today's focus:

[STCF's Optical Simulation]:

• • • • Compared the contribution of the air layer with and without the alumimum and epoxy glue at the back of the crystal.
      • Investigated how the thickness of the air layer affects the results.
      • Verified whether a higher surface roughness leads to higher light output and better uniformity.

[Others]:

• • • • I've recently been preparing for the new semester.

Plans:

[STCF's Optical Simulation]:

• • • • Run simulations under more conditions to verify whether the conclusions drawn from these comparisons are correct.

[Others]:

• • • • I'll need to attend classes and may have some small tests to complete.

10:10 → 10:20 Status

Speaker: Kang Yu (TDLI, SJTU)

1. Learn the general procedure of MC requests.
2. Take 1 ADCoS shift.

10:20 → 10:30 Status

Speaker: Linjing Duan (TDLI, SJTU)

[ZZy]

Finished

• Completed the 4ℓγ integration job and submitted the Run-3 MC sample request ticket.

• Finished preparing the README and internal note for the EasyJet ZZγ framework.

Plan

• Focus on the Rivet validation plots for the requested MC samples and prepare a report summarizing the validation strategy and results.

• Finalize and share the corrected version of the EasyJet ZZγ framework with other members for validation.

• Reproduce the Run-2 validation with HGamGamStar as a cross-check of the EasyJet implementation.

[HGTD]

• Reviewed the scope, goals, and main technical tasks of the HGTD AQP project.

• Discuss the next steps with Matthias, especially the software setup and how to start working with the fitting farm.

• Start getting familiar with the relevant fitting-farm code and scan/fitting workflow.

 

10:30 → 10:40 Status

Speaker: Jun Wei Lok (TDLI, SJTU)

10:40 → 10:50 Status

Speaker: Zelin Yan (TDLI, SJTU)

[Today's focus:]

• Wlllv analysis: 
  • Finish preliminary SR+WZCR joint fit with new samples by TRExFitter
• HGTD FELIX Monitoring: 
  • Establish full monitoring chain: FELIX hardware -> felix-io -> OPCUA server -> WinCC OA panel 

[Next Plans:]

• Wlllv analysis: 
  • Figure out the unexpected huge Muon ISO sys issue. 
• HGTD FELIX Monitoring: 
  • Investigate into changing registers on FELIX card via felix-io in general.
  • Investigate if we can use OPCUA server change a register.
  • Test how many OPCUA server we need for many FELIX card and each host, it's best if single one is OK.

10:50 → 11:00 Status

Speaker: Bai-Hong Zhou (TDLI, SJTU)

[ssWW]:

• Fixed the FastFrames errors in new ROOT version (has been merged to the master),

[HWW QE]:

• Prelimininary study for profile likelihood unfolding for wigner-P functions.
  • Large uncertainties (due to statistics and bad reconstruction).
  • Still need further validation.

[Boosted HH to 4b]:

• Investigated the statitics FW using for boosted_VBF.
  • Made a plan with Hava and Zonghuan to harmonize the statitics FW between boosted_VBF and the general one used for other categories in HH4b.

Plans: 

 

[ssWW]:

• Make sure our sswwjj_fastframes can run ntuples with VBSTools smoothly.
• Investigate on the theory unc implemention.

[HWW QE]:

• Investigate the PLU process.
• Learn the Hypothesis test strategy in HZZ QE;

[Boosted HH to 4b]:

• Harmonize the statitics FW between boosted_VBF and the general one used for other categories in HH4b.
• Run the JO for CHResonance VBF HH4b signal and plan for sample request if the JO is validated.

11:00 → 11:10 Status

Speaker: Xuliang Zhu (TDLI, SJTU)

11:10 → 11:20 Status

Speaker: Zhiyu Zhao (TDLI, SJTU)

11:20 → 11:30 Status

Speaker: Haidar Mas'ud Alfanda (TDLI, SJTU)

DarkSHINE

• Several ideas were proposed to DarkSHINE by the theorist: milli-charged particles (MCP), magnetic dipole moment (MDM), electric dipole moment (EDM), charge radius (CR), etc.
• At the moment I will focus on MDM
• The model was setup working with MG5, obtained the cross-section
• Next step: generate more events, create the look-up-table, and start the full simulation

 

Exotic Higgs decay analysis

• Complete the BDT code which is currently under development

 

ATLAS HGTD

• I will take a wafer test shift tomorrow

11:30 → 11:40 Status

Speaker: Matthias Tartarin (TDLI, SJTU)

 

---

Today's focus: 

[Hyy*]:

• Lot of documentation and summary work done on both merged ID and CP studies. 
  
  

[ZZy]:

• (Please fill the Newdle link shared in the email Anke sent earlier, deadline is tomorrow. I re-sent the link in the WeChat a few days ago).

 

[VBS_KappaLambda]:

• The complete new UFO model created with FeynRules is operational (Wolfram Mathematica is now working). Previous results presented (about the c_WWH coupling) have been reproduced (validation) and beyond (more freedom in the model).

 

 

---

Plans: 

• [ssWW]: Still same item as last week: Plan to finally present the unfolding studies.
• [Hyy*]: Develop original work from the documentation work already made. Focus on merged ID first.
• [VBS_KappaLambda]: Detector level studies are next ; Discussion with Prof. Xie to organise next effort is also considered
• No direct plan on the other topics, other than continuing what is already ongoing.

11:40 → 12:35 REU: Undergraduate Research Discussions

11:40 Status (w/ Linjing&Danning)

Speakers: Bingxian Li (SPA, SJTU), Jiacheng Shi (SPA, SJTU), Yuning Chen (Zhiyuan College, SJTU), Zhengyang Qian (SPA, SJTU)

11:50 Status (w/ Haydar)

Speakers: Hansheng Ye, Mingyu Huang (Univ. of Manchester (GB))

primeTag_scores_log.png

Today's focus

[CEPC Hbb Analysis]

Mingyu:

• Sample Production
  • Produced about 80k events so far.
  • Continued the production towards the 500k-event target.
• Observable distributions Plots
  • Learnt how to plot distribution and refine formatting with ROOT.
  • Explored distribution fitting for the analysis and adjusted fit parameters.
  • 
• Final report preparation
  • Making slides to summarize the internship work.

 

Hansheng:

Migrated the analysis chain from LCG105 to LCG109

• Rebuilt ZllSelector, PrimeTagSvc and HqqBDT in the LCG109 environment.
• Resolved the main environment issues during the migration.

Implement Haidar's ZllSelector --> flavour tagging --> derived ntuple workflow

• ZllSelector selects the dilepton system and passes the remaining PFOs to the jet/flavour-tagging analysis.
• Successfully ran HqqBDTReco with PrimeTag under LCG109 and produced ROOT ntuple output.
• Using Z-->mumu in the steering file for the time being.

Continued large-scale reconstruction

• Reco production has started, 300k events produced up till now.
• These reconstructed samples are ready to go through the ZllSelector + flavour-tagging analysis chain.

Future Goal

• Continue for Z-->ee channel and combine the results.
• Produce full derived ntuples for BDT training.

12:00 Status (w/ Xuliang)

Speaker: Hongyi Chen (University of Nottingham, Ningbo, China)

Finished

• Changed the U-Net to a streaming structure and used DATAFLOW so that different layers can run in parallel. The required skip connections were kept.

• Moved the U-Net weights from external inputs to internal ROMs. This reduced the number of generated memory interfaces from approximately 807 to two.

• Normalized the BDT inputs and thresholds and reduced their bit width from 32 bits to 6 bits.

• After optimization, the top-level latency was reduced from 660 to 279 cycles, and the interval was reduced from 661 to 280 cycles.

• The HLS synthesis time was reduced from approximately 10 hours to around 10 minutes.

• The optimized design was successfully implemented on the laboratory FPGA and met the timing and resource requirements.

Plans

• Train the U-Net and BDT using real data generated by the DarkSHINE simulation.

• Use Conifer to convert the trained Python BDT model into HLS code.

• Finally, test and validate the complete FPGA implementation using real data.