Kun's weekly discussion with students

Wednesday 22 Feb 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 (Tsung-Dao Lee Institute & Shanghai Jiao Tong University)

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

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

ttWML analysis status:

• The analysis closure meeting took place on Friday at a special Top plenary and it went overall smoothly. There was a lengthy discussion however about the regularization method used for the unfolding which seems to be too strong but stress tests were already performed to gain confidence in the method. The team will get in touch with the stats forum for further feedback but this will not delay the first ATLAS circulation planned for Feb 24th.
• Latest version of the INT note (v07) and paper draft (v07) were circulated to the EB and Top group. We are currently addressing feedback and comments received on the paper draft to be ready for circulation.

ttHML analysis status:

• Decision made to adopt the 3D MVA setup for defining the SR discriminant in the 2lSS channel but the choice of BDT vs DNN is still not made. The performance in a realistic fit setup based on latest production will need to be assessed to guide the choice.
• Jialin currently checking the MC modeling of all the input training variables to rule out any with poor modeling.
• The option to adopt a looser b-tagging WP for the events selection is being considered as it was shown to result in enhanced MVAs performance. Currently working on testing the impact of adopting this WP on the template fit fakes estimation.

16:15 → 16:25 ATLAS ttH analysis

Speaker: jialin li

20230222_ttH.pdf

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

Speaker: Kang Liu

QT

I am trying to add code that applies the Smirnov transform to Rel22 TagAndProbe framework to get photon-like sample. 

EGamm Workshop preparation

I am writing the slides for the EGamm workshop in March and I intend to rehearse them next Wednesday so that I can get suggestion and revise them. 

 

16:35 → 16:50 ATLAS Zgamma analysis

Speakers: Yufeng Wang (TDLI), yufeng wang

16:50 → 17:00 DarkSHINE analysis general

Speakers: Yufeng Wang (TDLI), yufeng wang

analysis20230222.pdf

• 1e9 1.5.5 inclusive sample produced by Hanqing.
  • track reco. algorithm updated, "bad track" rate reduced. (5%/15% --> 1%/6% for tag./rec.)
  • track chi2 fixed.
  • full HCAL calibration.
  • list of HCAL particle type & energy.
• to be produced (waiting for more space):
  • 1e10 1.5.5 inclusive sample.
  • 1.5.5 signal sample.
  • SideHCAL information.
  • list of HCAL particle position.

17:00 → 17:10 DarkSHINE tracker study

Speaker: Junhua Zhang

20230222-Junhua.pdf

17:10 → 17:20 DarkSHINE HCAL Study

Speaker: Hanqing Liu

1.Finsihed the neutron distribution graph

The information of particle  entering  before HCAL, such as energy, position is easy to get now.

2. The result of the 1e7 sample looks good. Because of lack of enough hard disk space, I am trying to get a 1e9 result now .

To do

1. some problems in analyzing the 1e9 sample, working on it

17:20 → 17:30 Silicon strip sensor

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

AC-LGAD based 4D tracking detector R&D for the future lepton collider.ppt

sensor test discussion.pdf

• IV test validation; charge collection + spatial resolution; time resolution. 
• discussion with IHEP: https://indico-tdli.sjtu.edu.cn/event/1552/
  • waiting for Mengzhao's reply about PCB board.
  • heading to IHEP once wire bonding (2 boards) is booked.
• further SJTU PCB board production (64 channel? for 2x4 cm sensor): discussion with Prof. Wu Weihao

17:30 → 17:35 Non-academic items

Anything else?