FCC-ee Workshop on Particle Flow Reconstruction

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

CERN

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

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.

 

Please note that the timetable is still a first draft, we are waiting for confirmations from the speakers.

Monday 1 September

09:00 → 10:35 Introduction

09:00 Welcome

09:05 The Particle Flow approach

Speaker: Patrick Janot (CERN)

10:05 Overview of Pandora and historical context

Speaker: Mark Thomson (CERN)

10:35 → 10:50 Coffee break

10:50 → 12:15 Introduction

10:55 Detector Concepts: CLD

Speaker: Leonhard Reichenbach (University of Bonn (DE))

11:15 Detector concepts: ILD

11:35 Detector Concepts: ALLEGRO

Speaker: Brieuc Francois (CERN)

11:55 Detector Concepts: IDEA

Speaker: Iacopo Vivarelli (Universita e INFN, Bologna (IT))

12:15 → 13:45 Lunch

13:45 → 14:15 Pandora: Introduction to Pandora

13:45 Pandora SDK

Speakers: Andrew Chappell (University of Warwick (GB)), John Stuart Marshall (University of Warwick (GB))

14:15 → 15:15 Pandora: Pandora algorithms

14:15 Overview of the LCContent library

LCContent contains algorithms that were implemented for the linear collider experiments. The development has not continued in the recent years.

Speaker: John Stuart Marshall (University of Warwick (GB))

15:15 → 15:30 Coffee break

15:30 → 16:30 Pandora: Pandora algorithms

15:30 Overview of LArContent library

LArContent library is used in the neutrino's experiments.
It represents the more modern developments.

Speaker: Andrew Chappell (University of Warwick (GB))

16:30 → 17:30 Pandora: Discussions

16:30 Discussion

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?
What are the ideas on how to continue with the LCContent?
What is the start point for the new detector concepts that are far from ILD/CLICdp?

Tuesday 2 September

09:00 → 12:00 Pandora: @ FCC

09:00 Experience with Pandora for CLD

09:45 Experience with Pandora for ALLEGRO

10:30 Coffee break

10:50 Experience with Pandora for IDEA

11:35 Discussion

What do we think should work (or not) for those detectors?
How to continue using Pandora?

12:00 → 13:30 Lunch

13:30 → 15:30 Pandora: Technical implementation

13:30 Pandora @ key4hep

How does it work now,
plan for future.

14:00 Debugging Pandora

PandoraMonitoring
other tools ?

15:00 Discussion

How to use best debugging tools in Pandora @ FCC?

15:30 → 15:50 Coffee break

15:50 → 17:30 Pandora: Discussions

Wednesday 3 September

09:00 → 10:30 Particle Flow approaches: Colliders

09:00 Overview of Particle-Flow in ATLAS

09:30 Overview of Particle-Flow in CMS

10:00 Overview of Particle-Flow in CEPC

10:30 → 10:50 Coffee break

10:50 → 12:20 Particle Flow approaches: Machine Learning

10:50 Machine-Learning Particle Flow in FCC

11:35 Machine-Learning Particle Flow in CLICDet/FCC-ee CLD/CMS

12:20 → 13:50 Lunch

13:50 → 15:20 Particle Flow approaches: Machine Learning

13:50 Machine-Learning Based Reconstruction in CEPC

14:35 Machine-Learning Based Particle Flow in ILD

15:20 → 15:40 Coffee break

15:40 → 17:30 Particle Flow approaches: Discussion

Thursday 4 September

09:00 → 17:00 Hackathon

Friday 5 September

09:00 → 17:00 Hackathon