Shu's weekly group discussion

Wednesday 27 May 2026, 10:00 → 13:35 Asia/Shanghai

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

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

10:00 → 10:05 Introduction & Announcements

Meeting's note: [No special announcement has been made during this meeting.]

 

Announcements:

 

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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
• [...]

[...]

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Plans: 

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

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10:05 → 10:15 Status

Speaker: Kang Yu (TDLI, SJTU)

Sorry, I don't have updates this week

10:15 → 10:25 Status

Speaker: Linjing Duan (TDLI, SJTU)

CEPC Zvvy nTGC

• Discussed the current progress of Yuning’s undergraduate innovation project. Helped resolve the sample production issue, enabling the project to proceed to full simulation and fitting studies.
• As the remaining tutorial work given by Danning is expected to be completed soon, it would be useful to discuss the next-stage tasks and follow-up plan

ZZy

• Supplemented the remaining MC sample list needed for the current Run 3 analysis.
• Continued working on the ZZγ signal process cross-section calculation using Sherpa 2.2.5. So far, I have completed the 0-jet@NLO setup. The next step is to merge the 1–3 jet samples at LO with the 0-jet NLO sample.
• Plan to discuss the current status and next steps after the kickoff meeting.

10:25 → 10:35 Status

Speaker: Jun Wei Lok (TDLI, SJTU)

Thermal Analysis of ECAL prototype.pptx

10:35 → 10:45 Status

Speaker: Zelin Yan (TDLI, SJTU)

[Today's foucus:]

• Wlllv analysis: 
  • Compare fit result between BDT score and mT_lllv or mlll, but failed in trex-fitter.
  •  Prepare slides for subgroup meeting.

[Next plans:]

• Wlllv analysis:
  • Reply comments from Junjie and Aram last night and modify our slides 
  • Fix the bug in mlll fit.
  • Optimize xgboost training on vars selection, especially comparision between m_sfos and m_ll_ij 
• HGTD FELIX Monitoring: 
  • Link more vars in WinCC and OPC-UA 
  • Visualization on WinCC panel 
  • Ask Alex for later works 

10:45 → 10:55 Status

Speaker: Bai-Hong Zhou (TDLI, SJTU)

Today's focus: 

[ssWW]:

• Export the ParT weight to ONNX format;
  • Can export the score in Fastframes;
• Plot the LL/LX/ssWW sig vs bkg score in WZCR; 

[Hyy*]:

• Checked the 95% CL upper limit results with Laura;
  • 1.69 for S+B with sys (->consist with Laura's results);
  • 0.70 for background only with sys (Laura's results is 0.71);
• Produced new workspace based on Laura's updates;

 

Plans: 

 

[ssWW]:

• Prepare to present the ParT training results;

[Hyy*]:

• Update the combination results with new workspace provided;
• Check the 95% CL upper limit in new workspace;
• Do the breakdown test again;

10:55 → 11:05 Status

Speaker: Xuliang Zhu (TDLI, SJTU)

11:05 → 11:15 Status

Speaker: Zhiyu Zhao (TDLI, SJTU)

Plans: 

• [DarkSHINE CDR]:  finish revision this week
• [STCF EMC]:  I found that the fast photons in the detector usually have shorter wavelengths, so I thought we could use an optical filter to remove the longer-wavelength photons to improve the timing resolution, and I am currently trying this approach.
• [PhD thesis]: I refactored some of the simulation code to prepare for adding more plots in my thesis next

11:15 → 11:25 Status

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

11:25 → 11:35 Status

Speaker: Matthias Tartarin (TDLI, SJTU)

 

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Today's focus: 

[HIGP Derivation]:

• Ready to take over Qiuping, after review of the tasks and responsibilities demanded over the past days.
   

[Hyy*]:

• Job done on the fake CR (and the plots associated) have been validated by the group. Next step to make a linear fit of the {lly only} yield to the total {lly+ fake CR} yield has also been done and shared privately to the AC who suggested it.

Plot of the linear fit between the ratio of {lly only}/{lly+ fake CR}  to effectively reweight the distributions which would be later used for background fit study (performed by other members of the analysis). This plot is only for one category out of 9 (low pt mumu).

• Once I have the updated Run-3 values on the fake fractions (and k-factor?) from Danning, I will produce the updated fake plots (and updated linear fits parameters).
   

[ssWW]:

• WZ CR reweighting: Implementation of the reweighting inside FF rather straightforward. Possible modification for the implementation (2 files only, ~20 lines total) have been shared with Baihong.
• dim-8 EFT: Strategy from legacy is clear. We can start implementing it following the same set-up that Run-3 dim-6 shared few weeks ago. Waiting to get a real closure on WZ CR reweighting first?

[VBS Kappa_Lambda]:

• Implementation @LO reproduced using MadGraph, and assessed the work needed for the @NLO picture.

 

 

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Plans: 

• [HIGP Derivation] Last item to cross of the list is to attend the weekly-meeting on Wednesday. 
• [VBS Kappa_Lambda] Next step would be to implement a batch submission for MadGraph jobs to reproduce QiBing cross sections results wrt to the updated mass of the Higgs.
• [ssWW;Hyy*;ZZy] Continue working on the on-going tasks, and strengthen our current results.

 

 

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

11:35 Status

Speaker: Zhijing Zhang (CCNU & TDLI/SJTU)

11:40 Status

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