Kun's weekly discussion with students

Wednesday 21 Jun 2023, 16:00 → 17:50 Asia/Shanghai

N642 (TDLI)

Tencent meeting room: https://meeting.tencent.com/dm/NXVVKc7PPZSs

Meeting number: 695-8098-7502

16:00 → 16:05 Introduction

General items.

Speaker: Prof. Kun LIU (TDLI/SPA, SJTU)

16:05 → 16:15 ATLAS ttWML and ttHML analyses status

Speaker: Nihal BRAHIMI (Tsung-Dao Lee Institute & Shanghai Jiao Tong University)

16:15 → 16:25 ATLAS ttH analysis

Speaker: Jialin Li

20230621.pdf

16:25 → 16:35 ATLAS photon ID efficiency & Zgamma analysis

Speaker: Kang Liu

Progress of QT 20230621.pdf

16:35 → 16:45 DarkSHINE analysis general

Speaker: Yufeng Wang (TDLI)

electron initial energy bias in signal:

• four 5e5 signal samples generated (baseline 1.5, multi-track reconstruction fixed) for this check.
• this additional energy bias (>4 GeV) causes only 0.7% event loss.
• overall signal efficiency is not affected; overall track selection efficiency has a ~0.5% loss from this additional bias.
  • difference @ reco level comes from low-momuntum track mis-reconstruction.

axion model:

• photon-coupling dominated case: 
  • through secondary photons; mis-located signature if decay into photon pairs.
  • model's ready, but need to find a way to implement.
• electron-coupling dominated case: 
  • via direct bremsstrahlung (i.e., similar as dark photon inv. case).
  • fixed a bug in calcHEP
  • generated 4 mass points (assuming photon-coupling is absent), checking distribution
  • providing sensitivity once checked with theorist

16:45 → 16:55 DarkSHINE tracker study

Speaker: Junhua Zhang

20230621-Junhua.pdf

16:55 → 17:05 Silicon strip sensor

Speakers: Hanqing Liu, Jialin Li, Junhua Zhang, Kang Liu, Yufeng Wang (TDLI)

17:05 → 17:25 Undergraduate students projects

Speakers: DIAN YU (School of Physics and Astronomy, Shanghai Jiaotong University), Lin Yang (TDLI)

17:25 → 17:30 Non-academic items

Anything else?