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)
CERN (222/R-001)

        : Sessions
    /     : Talks
        : Breaks
Oct 27, 2025
Oct 28, 2025
Oct 29, 2025
Oct 30, 2025
AM
9:00 AM
Awkward Array Internals: A Hands-On Hacking Session - Ianna Osborne (Princeton University) (until 12:00 PM) (31/3-004 - IT Amphitheatre)
9:00 AM Awkward Array Internals: A Hands-On Hacking Session - Ianna Osborne (Princeton University)  
PM
2:00 PM
Plenary Session Monday (1) - Ianna Osborne (Princeton University) (until 4:00 PM)
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 ---
4:30 PM
Plenary Session Monday (2) - Matthew Feickert (University of Wisconsin Madison (US)) (until 6:00 PM) (40/S2-B01 - Salle Bohr)
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))  
2:00 PM
Plenary Session Tuesday (3) - Iason Krommydas (Rice University (US)) (until 4:00 PM) (222/R-001)
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 - Dr Giordon Holtsberg Stark (University of California,Santa Cruz (US))  
4:00 PM --- Break ---
4:30 PM
Plenary Session Tuesday (4) - Iason Krommydas (Rice University (US)) (until 6:00 PM) (222/R-001)
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))  
2:00 PM
Plenary Session Wednesday (5) - Manfred Peter Fackeldey (Princeton University (US)) (until 4:00 PM) (13/2-005)
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 ---
4:30 PM
Plenary Session Wednesday (6) - Manfred Peter Fackeldey (Princeton University (US)) (until 6:00 PM) (13/2-005)
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)  
2:00 PM
Plenary Session Thursday - Manfred Peter Fackeldey (Princeton University (US)) (until 4:00 PM) (222/R-001)
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 - Dr 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)