Asian Physics and Software Meeting

Monday 19 Oct 2026, 15:00 → 16:15 Asia/Tokyo

https://u-tokyo-ac-jp.zoom.us/j/84554632255?pwd=ULm1jI5ElV05sHzpTw1NWeDhHZuFD1.1

meeting ID: 845 5463 2255
passcode: 843129

1 Schedule / Announcements / Discussion topics

• Beam dump exp.: beam test at KEK last week
  • press release, paper 2023 accepted by PTEP
• FCC Reconstruction Workshop, Oct. 26-29
• ICFA Seminar @ Toyama, Nov. 2-6; some high level message from ILC Diet-Federation Chairman being prepared
• LCWS 2026 @ KEK, Nov. 9-13

2 Higgs to ss study (Iwate)

Speaker: Harukaze Ito (Iwate university)

2026_10_19.pdf

2026_10_19.pptx

• learning to use BDT for the analysis
• 44 input variables
• exceeds memory limit of 4GB
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3 Higgs to ss study (Tokyo)

Speaker: Takumi Seino (The university of Tokyo)

I cannot attend the meeting today (and  also for next week), due to I'm attending ISBA26

Currently working:

• hadronic ch
  • trained ParT again since the last results (used past weight data for the prediction) had worse output score compared to the past training.
  • running Marlin processor with overlayremoval, in order to test if the remaining 2f bkg are due to pile-up performance or not
• neutrino ch
  • as hadronic ch, got better results using DNN+templatefit
    • compared with last method, where only one BDT was applied
  • ↑ here, I didn't included 2fZhad and 4fWsl processes, which are omitted for Hss analysis
    • run Marlin for these processes, only for limited number of events
    • >> 2fZhad process survived sub-dominantly.
    • I will need to run marlin process again for 2fZhad bkg.

4 Higgs to bs / TPC distortion study

Speaker: Kanako Watanabe

5 PFA with machine learning

Speaker: Tatsuki Murata

6 Higgs to strange-quark study at FCC-ee

Speaker: Nagomi Dogishi (ICEPP, U. Tokyo)

• V0 finder
• LCFIPlus training
• V0 difference in h->ss/gg samples: not significant
• Angular distribution: difference in thrust, momentum
•