Name: PyHEP 2025 - "Python in HEP" Users Workshop (hybrid), CERN
Start: 2025-10-27T13:00:00+01:00
End: 2025-10-30T22:00:00+01:00
Location: CERN

PyHEP 2025 - "Python in HEP" Users Workshop (hybrid), CERN

from Monday, October 27, 2025 (1:00 PM) to Thursday, October 30, 2025 (10:00 PM)

Monday, October 27, 2025
2:00 PM Plenary Session Monday (1)
2:00 PM - 4:00 PM
Room: 40/S2-B01 - Salle Bohr
Contributions

2:00 PM Welcome and workshop overview - Ianna Osborne (Princeton University)

2:10 PM ROOT's Newest Pythonizations: UHI, RDataFrame and More - Silia Taider (CERN)

2:20 PM RNTuple and Uproot - Andres Rios-Tascon (Princeton University)

2:50 PM uproot-custom: customize branch data reading in Uproot - Mingrun Li (IHEP, CAS)

3:00 PM Simulations, Post-Processing and Visualisations of Detector Cooling Systems - Viren Bhanot (CERN)

3:30 PM ISpy NanoAOD: An event display for the NanoAOD format of the CMS Experiment - Thomas McCauley (University of Notre Dame (US))

3:40 PM PyLHE in 2025: New features and improvements - Alexander Puck Neuwirth (UNIMIB & INFN)

3:50 PM Coffea schemas modifications - Iason Krommydas (Rice University (US)) Maksym Naumchyk
4:00 PM Break
Break
4:00 PM - 4:30 PM
Room: 222/R-001
4:30 PM Plenary Session Monday (2)
4:30 PM - 6:00 PM
Room: 40/S2-B01 - Salle Bohr
Contributions

4:30 PM Reproducible reuse by default: Use of Pixi for software in (Py)HEP - Matthew Feickert (University of Wisconsin Madison (US))

5:20 PM Histogram Serialization - Henry Fredrick Schreiner (Princeton University)

5:50 PM PyTrees for vectors - Nick Smith (Fermi National Accelerator Lab. (US))
Tuesday, October 28, 2025
2:00 PM Plenary Session Tuesday (3)
2:00 PM - 4:00 PM
Room: 222/R-001
Contributions

2:00 PM Up your ML game: an overview of Python ML tools relevant to HEP - Liv Helen Vage (Princeton University (US))

2:50 PM Zero-overhead ML training from Python with ROOT in an ATLAS Open Data analysis - Martin Foll (University of Oslo (NO))

3:00 PM From ROOT to PyTorch: Seamless Data Pipelines with HDF5 - Jan Gavranovic (Jozef Stefan Institute (SI))

3:30 PM Efficient Statistical Modeling for Particle Physics Using Computational Graphs in Python - Giordon Holtsberg Stark (University of California,Santa Cruz (US))
4:00 PM Break
Break
4:00 PM - 4:30 PM
Room: 222/R-001
4:30 PM Plenary Session Tuesday (4)
4:30 PM - 6:00 PM
Room: 222/R-001
Contributions

4:30 PM Smart Gradient-Based Optimization of HEP Analyses - Lino Oscar Gerlach (Princeton University (US)) Mohamed Aly (Princeton University (US))

5:20 PM evermore: differentiable binned likelihoods in JAX - Felix Philipp Zinn (Rheinisch Westfaelische Tech. Hoch. (DE)) Manfred Peter Fackeldey (Princeton University (US))

5:40 PM Efficient binned profile likelihood maximization with Rabbit - David Walter (Massachusetts Inst. of Technology (US))
Wednesday, October 29, 2025
2:00 PM Plenary Session Wednesday (5)
2:00 PM - 4:00 PM
Room: 13/2-005
Contributions

2:00 PM FLARE: FCCee b2Luigi Automated Reconstruction And Event processing - Cameron Harris

2:30 PM PocketCoffea: Configuration Framework for CMS Analyses based on Coffea - Felix Philipp Zinn (Rheinisch Westfaelische Tech. Hoch. (DE))

3:00 PM Workflows via ParaO - Parametrizing Objects - Benjamin Fischer (RWTH Aachen University (DE))

3:30 PM Scattering Amplitude Reconstruction in Python - Giuseppe De Laurentis (University of Edinburgh)
4:00 PM Break
Break
4:00 PM - 4:30 PM
Room: 222/R-001
4:30 PM Plenary Session Wednesday (6)
4:30 PM - 6:00 PM
Room: 13/2-005
Contributions

4:30 PM Pythonic GPU Parallelism for HEP with cuda-cccl - Ashwin Srinath

5:30 PM Accelerating scientific Python code with dispatching: Graphs and Arrays - Aditi Juneja

5:40 PM Reviving Formulate - Andres Rios-Tascon (Princeton University)
Thursday, October 30, 2025
9:00 AM Awkward Array Internals: A Hands-On Hacking Session
9:00 AM - 12:00 PM
Room: 31/3-004 - IT Amphitheatre
Contributions

9:00 AM Awkward Array Internals: A Hands-On Hacking Session - Ianna Osborne (Princeton University)
2:00 PM Plenary Session Thursday
2:00 PM - 4:00 PM
Room: 222/R-001
Contributions

2:00 PM Coffea Framework: Current Status and Recent Updates - Iason Krommydas (Rice University (US))

2:50 PM (Super)powering ntuple analysis with coffea for ATLAS - Giordon Holtsberg Stark (University of California,Santa Cruz (US))

3:20 PM Wrangling Massive Task Graphs with Dynamic Hierarchical Composition - Benjamin Tovar Lopez (University of Notre Dame)

3:50 PM Workshop close-out - Ianna Osborne (Princeton University)

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