Shu's weekly group discussion

Wednesday 28 Jan 2026, 10:00 → 13:00 Asia/Shanghai

Tsung-Dao Lee Institute/N6F-N631 - 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 → 10:10 Status

Speaker: Kang Yu (TDLI, SJTU)

1. Review the principle of microcontroller unit, pulse width modulation and comparator.
2. Observe multi-photon events using SiPM and measure its breakdown voltage. Complete the relevant experimental report.

10:10 → 10:20 Status

Speaker: Linjing Duan (TDLI, SJTU)

Course project (Computational Methods in Particle Physics):

• Using Geant4 to design a simple detector geometry and performing basic data analysis with ATLAS data, still onging

CEPC Zvvy nTGC

• Started running the fitting last week.
• Encountered a problem similar to one from my undergraduate project, likely related to histogram scaling, affecting the event yields.
• Will double-check the histogram normalization and fitting setup this week.

10:20 → 10:30 Status

Speaker: Jun Wei Lok (TDLI, SJTU)

System Automation: Successfully implemented computer-controlled integration for the picoammeter and DC power supply.

Data Acquisition: Completed automated IV curve measurements at 20°C, 0°C, and -10°C.

Breakdown Voltage (V_bd) Results

Temperature (°C)	Vbd​ via Gain vs. V (V)	Vbd​ via IV Curve (V)	Difference (ΔV)
20	37.84	38.08	+0.24
0	36.72	37.56	+0.84
-10	36.64	37.29	+0.65

 

• The V_bd is determined by the intersection of a "low-V" and "high-V" linear fit on the ln(I) scale.
• Small deviations in the slope of the "high-V fit" are amplified when extrapolated, leading to the observed overestimation of V_bd

 

10:30 → 10:40 Status

Speaker: Zelin Yan (TDLI, SJTU)

H2a4b analysis: 

• update new ntuple analysis code(SR2b3j & CR0b)

Hyyd analysis: 

• Get the unblinded combination result 
• The obs(expected) limit is down to 0.9%(0.8%)

HGTD upgrade: 

• FELIX monitoring:
  • use opcua server to design simple model

Next: 

• H2a4b analysis: 
  • prepare slides for HLRS meeting tmr
• Wlllv analysis:
  • setup TRExFitter config of initial version ntuples 
• HGTD upgrade: 
  • Link felix-io and opcua server 
  • Monitor some simple vars like FPGA_CORE_TEMP  

10:40 → 10:50 Status

Speaker: Bai-Hong Zhou (TDLI, SJTU)

2026_01_28.pdf

10:50 → 11:00 Status

Speaker: Xuliang Zhu (TDLI, SJTU)

FPGA

11:00 → 11:10 Status

Speaker: Zhiyu Zhao (TDLI, SJTU)

20260128_calorimeter_digitization.pdf

11:10 → 11:20 Status

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

• H4b analysis

The ParT model trained on nnHqq doesn't gove good b-jet tagging score for my analysis

I will train the model from scratch using my own sample

But for this I need to produce massive sample for the training - concern about disk space

 

11:20 → 11:30 Status

Speaker: Matthias Tartarin (TDLI, SJTU)

No results to present or discuss during this meeting from my side. 
 

• ssWW (same signe WW) analysis : work-in-progress. Correct framework being set up in the SJTU HPC workzone (thanks to Baihong).
• Hyy* GM: No personal contributions yet. 

11:30 → 12:25 REU: Undergrad Research Discussions

11:30 Status

Speaker: Peixu Teng (SPA, SJTU)

屏幕截图 2026-01-28 101311.png

• Check the privious problem of the efficiency
  • I confirm that this is likely not a problem related to the number of instances generated.
  • The new figure is generated by sigma_cut/sigma_total. "Cut" performing the cut during the generation process in MadGraph5, which theoretically should avoid issues related to the number of generations.
  • It doesn't make many changes to N_sig figure

• About angle and momentum:
  • I haved already make the distrubution about angle and energy before and after the cut. 
  • Some of it seems very strange. I have selected some representative examples to showcase. (X is mass of HNL, Y is coupling number)
  • Every strange pattern seems to correspond to an anomalous frequency.

• About DP analysis:
  • Doing
• Something new about effiency
  • The problem about the efficiency figure may due to the virtual particle. Especially, HNL. the previous study can generate a perfect plot because we ignore the process: e- p > e- p snu snu~(have virtual particle nu/nu~)
  • At that time, we only concern e- p > e- p snu nu~ + e- p > e- p snu~ nu

 

11:35 Status

Speaker: Zhijing Zhang (CCNU & TDLI/SJTU)

updates.pptx

11:40 Status

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