Kun's weekly discussion with students

Wednesday 15 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:

• Latest version of the INT note (v07) was posted on Monday incorporating the final unblinded results (inclusive and differential fits) and paper draft (v06) will be released today
• We will have the analysis closure meeting on Friday at a special Top plenary. Following the closure, we will start circulation within ATLAS and hopefully go public for Moriond EW (CONF conversion)!

ttHML analysis status:

• Decision made to adopt the 3D MVA setup for defining the SR discriminant in the 2lSS channel. Working with Jialin to check the MC modeling of all the input training variables to rule out any with poor modeling.
• Need to decide on the DNN vs BDT architectures for the 3D MVAs after retraining based on the latest group production v0801. The performance in a realistic fit setup will need to be assessed to guide the choice.
• 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 preparing to test the impact of adopting this WP on the template fit fakes estimation.

16:15 → 16:25 ATLAS ttH analysis

Speaker: jialin li

20230215_ttH.pdf

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

Speaker: Kang Liu

Progress of QT 20230215.pdf

16:35 → 16:50 ATLAS Zgamma analysis

Speakers: Yufeng Wang (TDLI), yufeng wang

H->Zy: sensitivity improvement in the coming Run 3.

(new resonance search: similar strategy, probing possible excess in high mass region)

 

Reproduce the Run 2 result & perspective study of Run 3.

 

Full Run 2 glance: https://atlas-glance.cern.ch/atlas/analysis/analyses/details?id=1427

Full Run 2 Internal note: https://cds.cern.ch/record/2683431

16:50 → 17:00 DarkSHINE analysis general

Speakers: Yufeng Wang (TDLI), yufeng wang

analysis20230215.pdf

17:00 → 17:10 DarkSHINE tracker study

Speaker: Junhua Zhang

Finished:

study the map of delta_x and recoil_p in a small p reigon.

study the map of deflection angle and recoil_p in a full p reigon.

 

Next to do:

1. Check the code of theta_1's definition. Since the bad resolution in the figure.

17:10 → 17:20 DarkSHINE HCAL Study

Speaker: Hanqing Liu

2023.2.14.pdf

Already finished

-Particle information hit by hit

-1e7 HCAL energy scale

 

To do list

-Finish the 1e10 result（Hard disk space required）,the 1e9 sample already running

-The position of incident neutron.

17:20 → 17:30 Silicon strip sensor

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

discussion with Mei & Zhijun next week about the experiment/equipment details.

17:30 → 17:35 Non-academic items

Anything else?