4D Tracking and 5D Calorimetry

Thursday 2 Nov 2023, 10:00 → 12:00 America/Los_Angeles

Zoom:

https://stanford.zoom.us/j/92728532486pwd=eHBpcDQ0RjdnZlBjQmRHYW1WRjdFUT09

Password: 059507

Publications:

• https://cds.cern.ch/record/2870326 "Investigating the impact of 4D Tracking in ATLAS Beyond Run 4"

 

4D Tracking

1 Tracking clustering, seeding and finding

Tracking performance (purity, efficiency, CPU time)
minimum pT threshold
Large-R tracking

2 Object performance: b-tagging, charm-tagging, tau-tagging, PU suppression, Missing ET, particle flow

• b-tagging
• charm-tagging
• tau-tagging
• PU suppression
• Missing ET
• Particle flow

3 Layout studies

Mechanical, electrical (power), radiation, and data-transmission constraints for either a second layer replacement or a dedicated third timing layer. Consider potential technologies for sensors, electronics, and data-transmission. Study barrel and disk options separately.

5D Calorimetry

4 Vertex t0 reconstruction

• t0 resolution and efficiency
• Applications:
  o t0 for HGTD
  o PU suppression
  o LLP search (displaced photons/jets)

Speaker: Doyeong Kim

Screen Shot 2023-11-01 at 17.54.03 PM.png

Doyeong

color code: general discussion / action item

1. Feedback from the Upgrade Physics meeting https://indico.cern.ch/event/1337242/#9-5d-calorimetry 

• Need to check the agreement with Data. But, we are working on a 'feasibility' study to decide if it is worth investigating further with data. Next time, we can put a note on this and we'll eventually check the agreement btw data and MC. 
• Our sample is not uniform in pion pT (especially up to 10 GeV). So our result could be driven from higher pT pions and truth time resolution for lower pT pion could be worse. 

To address this,

1) We need to check if we are not lack of stat. Firstly, need to check if we need to generate more samples

2) Assuming we have enough events, we redo our study with fine pT granularity. something like [1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21] GeV.  

2. We had a discussion about correlation plots (attached to agenda). 

• Two left plots are appropriate, and we can see the correlation btw cell time of cells
• The sources of the correlation can be 1) Phycis or 2) measurement, ex cross-talk. We need to see if we can disentangle them when we have pion samples with pile-up

 

5 Single pion studies

• time evolution/structure of pion showers
• response vs time
• neutron component identification

Speakers: Doyeong Kim, Zahra Farazpay (Loisiana Tech)

6 Space-time structure of hadronic showers

• Response vs time
• overlapping showers
• time-aware GNN PFlow reconstruction

Speaker: Zahra Farazpay (Loisiana Tech)

7 Higgs Factory calorimeter timing studies

Electronics and Sensors: 4D/5D techniques

8 LGDAs

Speakers: Christopher Kenney (SLAC), Julie Segal (SLAC)

9 28nm CMOS TDC ASIC

Speakers: Bojan Markovic (SLAC), Larry Ruckman (SLAC)

10 4D Tracking and 5D Calorimetry electronic concepts

11 Intelligent readout: 4D pixel and 5D calorimeter clustering