Kun's weekly discussion with students

Wednesday 7 Jun 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 (TDLI/SPA, SJTU)

2 ATLAS ttWML and ttHML analyses status

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

3 ATLAS ttH analysis

Speaker: Jialin Li

1. remove tH region to fit. 
2. For page 4, understand why the central value and uncertainty of norm_ttW are larger. 
3. Remove ttW_xs systematics to check 1.(why)
4. Understand why adding ttW_xs uncertainty at 50% doesn't work at the red/blue block.
5. Understand and list all the systematics used(including the value).
6. For page 7, list the difference to compare( the difference between 2l and 3l is physics phase space not only some samples), and maybe ttbar CR in 3l is the issue, can remove it to check.
7. For pages 9 and 10, why the post-fit plots don't have QMisID samples?
8. For pages 9 and 10, why the post-fit plots have tiny uncertainty?

Based on the minutes:

1-4 are done(show in the plot)

5-6: Will compare and summary the the slides.

7: QmisID samples are shown in postfit plot after change POI from Norm_QMisID to mu_ttH. 

8. Need to check further.

Ongoing work:

1.  Running the new fit result with POI changed.
2. Wrote the macro to automatically produce mini-Ntuples. ( For all the training variables and further instrumental ntuples injection).

 

 

 

4 ATLAS photon ID efficiency & Zgamma analysis

Speaker: Kang Liu

I have run though the script of calculate electron fudge factors. The grid job for calculate data and mc PDFs of shower shape variables are running. 

here is my work plan:

 

5 DarkSHINE analysis general

Speaker: Yufeng Wang (TDLI)

Analysis:

• DCutflow tool has been pushed.
  • make branching ratio
  • any selection @ any level.
  • for signal: compute signal efficiency for all inputs --> for sensitivity study.

New physics:

• bug fixed in 
  • root injection
  • signal mass reading
  • secondary particle more than 1
• signal production (baseline 1.5 geo) ongoing:
  • 1e4 dark axion portal done;
  • 1e5 dark axion portal: DSimu done, DAna ongoing;
  • 1e5 axion: DSimu ongoing.
• current energy regiestration: 
  • incidentE * dp_E /8

6 DarkSHINE tracker study

Speaker: Junhua Zhang

Status for Dissertation Proposal: 

• Up to now, the first draft of this proposal, which is wating for comments, has been completed. The deadline for submitting the report is the 10th. So this item has the highest priority for me. 

Status for DarkSHINE Simulation: 

• Generatetd 1e7 events at both new and old geometry with the same bias. In events around 20MeV, the momentum reconstruction efficiency increased by 71% ( 20% for old, 91% for GeoE ) 
• Other variables can also be added to the scope of consideration, which will be discussed later.

 

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7 Silicon strip sensor

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

8 Undergraduate students projects

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

9 Non-academic items

Anything else?