FCC-ee Workshop on Particle Flow Reconstruction

Name: FCC-ee Workshop on Particle Flow Reconstruction
Start: 2025-09-01T08:30:00+02:00
End: 2025-09-05T18:00:00+02:00
Location: CERN

1 Sept 2025, 08:30 → 5 Sept 2025, 18:00 Europe/Zurich

40/S2-A01 - Salle Anderson (CERN)

40/S2-A01 - Salle Anderson

CERN

100

Show room on map

Anna Zaborowska (CERN), Dolores Garcia (CERN), Lena Maria Herrmann, Michele Selvaggi (CERN)

Description

This workshop is meant to discuss in details the particle flow approaches for the experiments on the Future Circular Collider (FCC-ee).

The first three days feature introductory talks and overview of the work at LHC and in neutrino experiments (modern Pandora developments), with the main part of the event dedicated to the FCC-ee detector concepts: current work on Pandora implementation and Machine Learning approaches.

The last two days of the event are dedicated to the hands-on sessions/hackathon and the discussions on the evolution of particle flow for FCC-ee.

We gratefully acknowledge the support of Brookhaven National Laboratory (BNL) in funding this workshop.

Participants

97 View full list

Monday 1 September
- 09:00 → 10:45
  Opening: Introduction 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
  Show room on map
  
  Convener: Michele Selvaggi (CERN)
  - 09:00
    
    Welcome 15m
    
    Speaker: Michele Selvaggi (CERN)
    
    FCC-ee workshop Particle Flow reconstruction.pdf
  - 09:15
    
    The Particle Flow approach 1h
    
    Speaker: Patrick Janot (CERN)
    
    PFIntro.pdf
  - 10:15
    
    Overview of Pandora and historical context 30m
    
    Speaker: Mark Thomson (CERN)
    
    PandoraPFA-Thomson.pdf
    
    PandoraPFA-Thomson.pptx
- 11:15 → 11:45
  
  Coffee break 30m
- 11:45 → 12:45
  Opening: Detector Concepts 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
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  Convener: George Iakovidis (Brookhaven National Laboratory (US))
  - 11:45
    
    Detector Concepts: CLD 20m
    
    Speaker: Leonhard Reichenbach (University of Bonn (DE))
    
    250901_FCC_CLD_reichenbach.pdf
  - 12:05
    
    Detector Concepts: ALLEGRO 20m
    
    Speaker: Brieuc Francois (CERN)
    
    20250901_DetectorConcept_ALLEGRO_Brieuc_Francois_PFlow_workshop.pdf
  - 12:25
    
    Detector Concepts: IDEA 20m
    
    Speaker: Iacopo Vivarelli (Universita e INFN, Bologna (IT))
    
    DetectorConceptIDEA_01092025.pdf
- 12:45 → 14:00
  
  Lunch 1h 15m
- 14:00 → 15:30
  Pandora: Introduction to Pandora 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
  110
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  Convener: Leonhard Reichenbach (University of Bonn (DE))
  - 14:00
    
    Pandora SDK 30m
    
    Speaker: John Stuart Marshall (University of Warwick (GB))
    
    FCCee_WorkingWithPandora.pdf
  - 14:30
    
    Overview of the LCContent library 1h
    
    Speaker: John Stuart Marshall (University of Warwick (GB))
- 15:30 → 16:00
  
  Coffee break 30m
  
  No coffee provided (technical difficulties around this room) - please head to R1!
- 16:00 → 17:00
  
  Pandora: Pandora algorithms 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
  110
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  Convener: Anna Zaborowska (CERN)
- 17:00 → 17:30
  Pandora: Discussions 4/3-006 - TH Conference Room
  
  4/3-006 - TH Conference Room
  
  CERN
  
  110
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  Convener: Anna Zaborowska (CERN)
  - 17:00
    
    Discussion 30m
    
    LCContent: how do we continue to develop it?
    LCContent: management of the git repository, how can FCC-ee or key4hep mainainers take more active role?
- 18:45 → 20:45
  
  Conference Dinner 2h Luigia
  
  Luigia
  
  Rte du Nant-d'Avril 148, 1217 Meyrin
Tuesday 2 September
- 09:00 → 12:00
  Pandora: @ FCC 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
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  Convener: Brieuc Francois (CERN)
  - 09:00
    
    Experience with Pandora for CLD 45m
    
    Speaker: Anna Zaborowska (CERN)
    
    PFlow_Pandora_CLD-3.pdf
  - 09:45
    
    Experience with Pandora for ALLEGRO 45m
    
    Speaker: Chris Rasmussen (Brookhaven National Laboratory (US))
    
    Pandora_ALLEGRO.pdf
  - 10:30
    
    Coffee break 20m
  - 10:50
    
    Experience with Pandora for IDEA 45m
    
    Speaker: Sang Hyun Ko (Seoul National University (KR))
    
    250902_PFworkshop.pdf
  - 11:35
    
    Discussion 25m
    
    What is the start point for the new detector concepts that are far from ILD/CLICdp?
    What do we think should work (or not) for those detectors?
    How to continue using Pandora?
- 12:00 → 14:00
  
  Lunch 2h
- 14:00 → 15:30
  Pandora: Technical implementation 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
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  Convener: Andre Sailer (CERN)
  - 14:00
    
    Pandora @ key4hep 30m
    
    Speaker: Juan Miguel Carceller (CERN)
    
    20250902-pandora-carceller.pdf
  - 14:30
    
    Overview of LArContent library 1h
    
    Speaker: Andrew Chappell (University of Warwick (GB))
    
    acha_fcc.pdf
- 15:30 → 15:50
  
  Coffee break 20m 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
  Show room on map
- 16:10 → 17:10
  Pandora: Working with Pandora 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
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  - 16:10
    
    Debugging Pandora 1h
    
    Speaker: Isobel Mawby (Lancaster University)
    
    FCCWorkshop_2_9_25.pdf
Wednesday 3 September
- 09:00 → 10:30
  Particle Flow: Colliders 40/S2-B01 - Salle Bohr
  
  40/S2-B01 - Salle Bohr
  
  CERN
  
  100
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  Convener: Josh Bendavid (CERN)
  - 09:00
    
    Overview of Particle-Flow in ATLAS 30m
    
    Speaker: Mark Hodgkinson (University of Sheffield (GB))
    
    PFlow_FCCEE_ATLAS_Sep2025.pdf
  - 09:30
    
    Overview of Particle-Flow in CMS 30m
    
    Speaker: Andre Govinda Stahl (CERN)
    
    FCC PF workshop_ CMS PF overview.pdf
  - 10:00
    
    Overview of Particle-Flow in CEPC 30m
    
    Speaker: Fangyi Guo (Chinese Academy of Sciences (CN))
    
    FP_in_CEPC_FCCWS.pdf
- 10:30 → 10:50
  
  Coffee break 20m 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
  Show room on map
- 10:50 → 12:20
  Particle Flow: Machine Learning 40/S2-B01 - Salle Bohr
  
  40/S2-B01 - Salle Bohr
  
  CERN
  
  100
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  Convener: Lena Maria Herrmann
  - 10:50
    
    Machine-Learning Based Reconstruction in CEPC 30m
    
    Speaker: Manqi Ruan
    
    CEPC - Holistic - FCCPFAWS - v2.pdf
  - 11:35
    
    Machine-Learning Based Particle Flow in ILD 30m
    
    Speaker: Taikan Suehara (ICEPP, The University of Tokyo (JP))
    
    250903-fccpfws-gnnpfa-suehara.pdf
- 12:20 → 13:50
  
  Lunch 1h 30m
- 13:50 → 15:20
  Particle Flow: Machine Learning 40/S2-B01 - Salle Bohr
  
  40/S2-B01 - Salle Bohr
  
  CERN
  
  100
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  Convener: Lena Maria Herrmann
  - 13:50
    
    Machine-Learning Particle Flow in FCC 30m
    
    Speakers: Dolores Garcia (CERN), Lena Maria Herrmann (CERN)
    
    MachineLearning_ParticleFlow_FCC_Sept3rd.pptx-1.pdf
    
    MachineLearning_ParticleFlow_FCC_Sept3rd.pptx.pdf
  - 14:35
    
    Machine-Learning Particle Flow in CLICDet/FCC-ee CLD/CMS 30m
    
    Speaker: Farouk Mokhtar (Univ. of California San Diego (US))
    
    FM_MLPF_PF@FCCworkshop.pdf
- 15:20 → 15:40
  
  Coffee break 20m 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
  Show room on map
- 15:40 → 17:30
  
  Particle Flow: Machine Learning Q&A 40/S2-B01 - Salle Bohr
  
  40/S2-B01 - Salle Bohr
  
  CERN
  
  100
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  Convener: Dolores Garcia (CERN)
- 17:30 → 19:00
  
  Social event 1h 30m 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
  Show room on map
Thursday 4 September
- 09:00 → 17:30
  Hackathon 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
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  - 09:00
    
    Introduction 10m 40/S2-A01 - Salle Anderson
    
    40/S2-A01 - Salle Anderson
    
    CERN
    
    100
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    Speaker: Anna Zaborowska (CERN)
    
    board teams
    
    FCC-ee_PFlow_hackathon.pdf
    
    Hackathon_info_rooms
  - 09:10
    
    Key4hep and Pandora 10m 40/S2-A01 - Salle Anderson
    
    40/S2-A01 - Salle Anderson
    
    CERN
    
    100
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    Speakers: Anna Zaborowska (CERN), Juan Miguel Carceller (CERN), Juraj Smiesko (CERN)
    
    Key4hep_pandora
    
    Key4hep_pandora
  - 09:20
    
    MLPF 10m 40/S2-A01 - Salle Anderson
    
    40/S2-A01 - Salle Anderson
    
    CERN
    
    100
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    Speaker: Dolores Garcia (CERN)
  - 09:30
    
    Common datasets 30m 40/S2-A01 - Salle Anderson
    
    40/S2-A01 - Salle Anderson
    
    CERN
    
    100
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    Speakers: Andrea De Vita (Universita e INFN, Padova (IT)), Michele Selvaggi (CERN)
    
    Dataset_hackaton_FCC_PF_workshop.pdf
  - 10:00
    
    Validation 30m 40/S2-A01 - Salle Anderson
    
    40/S2-A01 - Salle Anderson
    
    CERN
    
    100
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    Speaker: Lena Maria Herrmann
    
    k4hepphysicsvalidation.pdf
  - 10:30
    WORK IN SMALLER TEAMS 7h
    
    MLPF - pre-lunch 4/R-050 and after lunch: 5/R-026
    
    Physics Benchmarks - 4/3-004
    
    key4hep + Pandora - 4/3-001
    Calibration of Pandora - 2/R-021
    
    Common datasets - pre-lunch 4/R-050 and after lunch: 5/R-026
    
    Other rooms:
    4/R-050 , 61/1-017 (but from 13:30)
    
    team boards
Friday 5 September
- 09:00 → 17:00
  Hackathon 40/S2-A01 - Salle Anderson
  
  40/S2-A01 - Salle Anderson
  
  CERN
  
  100
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  - 09:00
    
    WORK IN SMALLER TEAMS 7h
    
    We all meet in one of those:
    
    4/S-020 Pandora
    4/S-030 tutorials and Physics validation
    4/S-056 common datasets and MLPF
    
    And 2 backup rooms (see slides)
  - 16:00
    
    Summary 1h 40/S2-A01 - Salle Anderson
    
    40/S2-A01 - Salle Anderson
    
    CERN
    
    100
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    Speakers: Andrea De Vita (Universita e INFN, Padova (IT)), Anna Zaborowska (CERN), Dolores Garcia (CERN), Lena Maria Herrmann, Michele Selvaggi (CERN)
    
    2025-09-05_FCC_PFlow_Hackathon_Validation.pdf
    
    Key4hep_FCC_Pandora
    
    PF_Hackathon_CommonDataset_MLPF-2.pdf
    
    PHOTOS.pdf

FCC-ee Workshop on Particle Flow Reconstruction

40/S2-A01 - Salle Anderson

CERN

40/S2-A01 - Salle Anderson

CERN

40/S2-A01 - Salle Anderson

CERN

4/3-006 - TH Conference Room

CERN

4/3-006 - TH Conference Room

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4/3-006 - TH Conference Room

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Luigia

40/S2-A01 - Salle Anderson

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40/S2-B01 - Salle Bohr

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CERN

40/S2-B01 - Salle Bohr

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40/S2-B01 - Salle Bohr

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