Shu's weekly group discussion

Wednesday 1 Jul 2026, 10:00 → 13:35 Asia/Shanghai

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

点击链接入会，或添加至会议列表：

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

10:00 → 10:05 Introduction & Announcements

10:05 → 10:15 Status

Speaker: Kang Yu (TDLI, SJTU)

10:15 → 10:25 Status

Speaker: Linjing Duan (TDLI, SJTU)

ZZy

• restarted the ZZγ XS calculation at 13 TeV and 13.6 TeV with Sherpa 2.2.5, following the Run2 setup. After fixing the LHAPDF/NNPDF30NNLO setup, the 13 TeV job is now running normally

Plan

• Plan to discuss the next steps for the Run3 ZZγ analysis, including the sample request/production, and the framework strategy between HGamGamStar and EasyJet.
• A kickoff meeting will be held this Friday.

 

10:25 → 10:35 Status

Speaker: Jun Wei Lok (TDLI, SJTU)

thermal analysis.pptx

10:35 → 10:45 Status

Speaker: Zelin Yan (TDLI, SJTU)

[Today's focus:]

• Wlllv analysis: 
  • Xgboost training for new non-prompt ntuples.
  • Fill BDT section in INT note.
• H2a4b analysis: 
  • Finish mc23ade and data 2022-2024 ntuple production.
  • Modify Coffea code for ntuple analysis.
• HGTD FELIX Monitoring:
  • Update opcuafelixbridge code and implement FPGA hardware health monitoring on WinCC and UaExpert 
• Others：
  • Wafer test on Monday: fix one issue in link between FPGA and FMC board.

[Next plans:]

• Wlllv analysis: 
  • Data/MC comparison in SR sideband of bdt score. 
  • SR+WZCR stats-only fit.
  • Continue on INT note BDT section edit.
• HGTD FELIX Monitoring: 
  • Learn about what link alignment means 
  • Setup link alignment monitoring both on WinCC and UaExpert(as crosscheck)
• H2a4b analysis: 
  • Generate also mc23ade LLP ntuples 
  • Status report of partial run3 dataset? More discussion with Bingxuan. 

10:45 → 10:55 Status

Speaker: Bai-Hong Zhou (TDLI, SJTU)

Today's focus: 

[ssWW]:

• Validated if FastFrames can process systematics samples;

[Hyy*]:

• Updated the m_lly and signal strength plots for paper;

• Produced the SM capatibility and systematic breakdown results for paper draft;

[DarkSHINE FastSimu]:

• Checked the deposited energy distribution for the FastSimu results;
  • No low-deposited events in current dataset (inclusive, 10k) -> May need to generate more samples;

 

Plans: 

 

[ssWW]:

• Modify the Fastframes to process the systematic ntuples;
• Check the systematics impact for ParT;

[DarkSHINE FastSimu]:

• Produce more samples for FastSimulation;
• Prepare the short presentation for the introduction of Calo-VQ and the migration work;

10:55 → 11:05 Status

Speaker: Xuliang Zhu (TDLI, SJTU)

11:05 → 11:15 Status

Speaker: Zhiyu Zhao (TDLI, SJTU)

Today's focus: 

[STCF EMC]:

• Plan to build a 16-channel SiPM array: the central 4 channels for timing measurement and the outer 12 channels for energy measurement. Their timing and energy resolutions need to be optimized separately. I have surveyed some existing methods, and need to design a validation board based on our requirements

[DarkSHINE ECAL Prototype]:

• I produced a prototype for FPC flex-cable testing. It uses flexible cables to connect the SiPM board and the preamplifier board, which is more friendly to the mechanical design and can help isolate heat sources from the detector-sensitive region. It is currently under test

[CEPC crystal ECAL]:

• Recently, I proposed a new idea: adding dual-readout capability (scintillation light + Cherenkov light) to the existing double-ended readout long crystal bars. A low-pass optical filter is placed at one end to read Cherenkov light, while the other end reads scintillation light. The difference in non-EM response between the two signals is then used for correction, improving hadron measurement precision.

 

• This is a scheme that others have explored before, but it can be applied to our current detector design with minimal modification. I have carried out some simulation performance studies and gave two presentations on this topic. The results look promising. People at IHEP expressed interest.

• I asked some BGO and BSO crystals IHEP, and I am currently testing them in our lab

11:15 → 11:25 Status

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

Exotic Higgs decay analysis

• Produced the NTuples for the EveNet model
• Currently testing the EveNet model (working with Xuliang)
• Next plan: Improve the b-jet tagging efficiency for the 4b final state topology
• There is a new jet reconstruction algorithm called eXclusive Cone (XCone) algorithm that can identify jets even for merged topology (https://arxiv.org/abs/1508.01518v3)
• Firstly I am validating the performance of this algorithm against eekT for the CEPC using H->bb process
• If the jet performance looks good, then I will train the ParT with jets clustered using the XCone algorithm

HGTD upgrade

• Took the wafer test shift in the weekend and will take another one this Saturday

11:25 → 11:35 Status

Speaker: Matthias Tartarin (TDLI, SJTU)

---

Today's focus: 

[Hyy*]:

• Post-unblinding : Produced paper-ready plots for the fake template side.
• Looked at comments on CDS regarding fake templates to be adressed.

[ZZy]:

• Kick-off slides draft is ready for Friday. Should they be discussed them further?
• Framework investigation still on-going, no progress to discuss at the moment.

[VBS kappa_lambda]:

• Looking into going beyond : Using latest version of MadGraph, and/or using different generators to compare results.
• Ideally: Discuss preliminary results with Prof. Keping Xie in a near future. About the collaboration size, what is the expected collaboration here / workplan ? 

---

Plans: 

• [ZZy]: Present the kick-off on behalf of SJTU/TDLI, and get a clearer idea about the Run-3 analysis other team's contributions. Continue working on the new framework.
• [ssWW]: Status not clear about the dim-8 EFTs MC production from USTC side. Direction to be explored if times allow: unfolding?
• [VBS kappa_lambda]: Continue direction investigated these past weeks.

11:35 → 12:30 REU: Undergrad Research Discussions

11:35 Status

Speaker: Zhijing Zhang (CCNU & TDLI/SJTU)

Today's focus: 

[STCF]:

• I corrected the error in the previous position resolution analysis. Then I obtained the correct position resolution results for both the positron beam simulation and experimental data.
• Taking the 1.0 GeV positron beam as an example. From left to right:  experiment - simulation (slight differences arise from detector effects and analysis uncertainties)
• 
• To investigate the dependence of the detector response on the incident position, the beam spot distribution on the ECAL was reconstructed from the tracker to analyze the differences between simulation and experiment. (The beam spot formed after scattering closely resembles that formed in the experiment)
• 

 

Plans: 

 

[DarkSHINE]:

• Conduct single-crystal simulations with Geant4 (sorry for the delay caused by prior other tasks)

[STCF]:

• Adjust beam spot size, then compare position resolution between hits at crystal center and edge.

11:40 Status

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