Kun's weekly discussion with students

Wednesday 29 Mar 2023, 16:00 → 17:50 Asia/Shanghai

N642 (TDLI)

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

Meeting number: 695-8098-7502

1 Introduction

General items.

Speaker: Prof. Kun LIU (Tsung-Dao Lee Institute & Shanghai Jiao Tong University)

2 ATLAS ttWML and ttHML analyses status

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

ttWML analysis status:

• ttW analysis is public at last! results were shown at Moriond EW last Friday 
• A public webpage and physics briefing also available
• CONF note draft 1.5 signed off today —> to be released this week

ttHML analysis status:

• Given the updated timescale for the analysis (EB request by end of May), we need to freeze the MVAs strategy by Mid-End April. First step of optimization concerns finalizing the list of variables to be used.
• CRONLY and BONLY fits to data are being performed considering only CRs from the ttW analysis. These are needed to understand the discrepancies we see in the data/MC comparisons mainly the deficit in the “Other” CR which is enriched in VV background.

3 ATLAS ttH analysis

Speaker: jialin li

4 ATLAS photon ID efficiency & Zgamma analysis

Speaker: Kang Liu

LGAD_Position_Reconstruction.pdf

QT:

I have ask for Nadezhda for how to add cut in shower shape variables to calculate ID efficiency. She told me that I can use the AsgPhotonsEMSelector tool.

Now I am trying to add the tool in TnP frameworks.

Tracker:

We have calculate the position resolution of W11 and W12 Silicon sensor. W11 ~ 7.1 um, W12 ~ 10.2 um.

Next step we can measure the IV and CV of W11 (The avalanche voltage is expected to be above 380V), and measure position resolution of another two designs 40(20), 30(15) after read board is ready.

5 ATLAS Zgamma & diphoton analysis

Speakers: Yufeng Wang (TDLI), yufeng wang

6 DarkSHINE analysis general

Speakers: Yufeng Wang (TDLI), yufeng wang

• check signal efficiency & incl. background event ratio with fixed track reco. algorithm.
• investigating dark portal model using calcHEP.
  • implementing Lagrangian
  • check kine. distribution & cross section
  • simulate signal sample

7 DarkSHINE tracker study

Speaker: Junhua Zhang

20230328-Junhua.pdf

8 DarkSHINE HCAL Study

Speaker: Hanqing Liu

1. Still writing the thesis, finished the part of chpt2 and chp3,  summarizing the old result to write chp4.

2. About the new design of HCAL. We give a new judgment criteria that selects the nuclear process veto inefficiency to judge whether to add a Side HCAL.

3. I hav also already finished the code check  and simulation work, waiting for chunxiang's result（3fibers version）.

 

9 Silicon strip sensor

Speakers: Hanqing Liu, Junhua Zhang, Kang Liu, Yufeng Wang (TDLI), jialin li, yufeng wang

10 Non-academic items

Anything else?