PIONEER 2nd Reconstruction Workshop

Session

Day 1

13 Jul 2026, 08:40

Room 128 (conference room) (CENPA)

Conveners

Day 1: Status of viability campaign

• Quentin Buat (University of Washington)
• Patrick Schwendimann (ETHZ)

Day 1: Test beam simulations

• Quentin Buat (University of Washington)
• Patrick Schwendimann (ETHZ)

Day 1: Software

• Quentin Buat (University of Washington)
• Patrick Schwendimann (ETHZ)

Day 1: Baseline Pipeline

• Patrick Schwendimann (ETHZ)
• Quentin Buat (University of Washington)

Day 1: AI

• Quentin Buat (University of Washington)
• Patrick Schwendimann (ETHZ)

4. Toward 0.01%

Quentin Buat (University of Washington)

13/07/2026, 08:40

7. piE5 beam and PSM simulations

Kolja Frahm (ETH Zurich)

13/07/2026, 09:10

8. piE5 measurement plans

Joshua LaBounty (University of Washington)

13/07/2026, 09:40

12. Low-level reconstruction / raw data processing

Patrick Schwendimann (ETHZ)

13/07/2026, 10:10

14. PIONEER simulation and reconstruction framework 3.0

Patrick Schwendimann (ETHZ)

13/07/2026, 10:50

2. LXe Calo reconstruction overview

Kensuke Yamamoto (The University of Tokyo)

13/07/2026, 11:10

We made significant progress on the LXe calorimeter reconstruction and are integrating the LXe reconstruction methods into the develop branch (called V3 before). This presentation gives an overview of the LXe calorimeter reconstruction and how to run the LXe option.

5. Status of the simulation and detector response

Bradley Taylor (University of Washington - CENPA)

13/07/2026, 13:00

6. Status of the Rule-based reconstruction

Sean Foster (Amherst College)

13/07/2026, 13:20

9. ATAR8 simulations

Jessie Yang (University of Washington)

13/07/2026, 13:50

15. genFit

Adam Molnar (SCIPP (Santa Cruz Institute for Particle Physics))

13/07/2026, 14:10

10. Pioneer Unified Reconstruction with Interactive Transformer topologY (PURITY)

Omar Beesley (University of Washington)

13/07/2026, 15:00

13. AI Infrastructure

John Carlton (University of Kentucky)

13/07/2026, 15:30

1. ML approach to LXe event reconstruction

David Gallacher (McGill Univeristy)

13/07/2026, 15:50

We present a graph neural network-based approach to calorimeter shower reconstruction in liquid xenon, under development for the PIONEER experiment's LXe calorimeter option. The method employs a GravNet backbone operating on a graph of active sensors as nodes, with node features encoding spatial position, sensor type, and a compact temporal representation of photon arrival times via a learned...

11. AI Opportunities for PIONEER

Tyler Barrett (Cornell University)

3. Introduction

Patrick Schwendimann (ETHZ), Quentin Buat (University of Washington)