LHC Monte Carlo WG plenary meeting

from Wednesday 8 October 2025 (09:00) to Thursday 9 October 2025 (18:00)
CERN (4/3-006)

        : Sessions
    /     : Talks
        : Breaks
8 Oct 2025
9 Oct 2025
AM
09:00 Introduction  
09:15
Updates from Experiments (until 10:30)
09:15 ALICE (remote via Zoom) - Antonin Maire (IPHC - Strasbourg (CNRS-In2p3/Unistra))  
09:30 ATLAS - Ana Rosario Cueto Gomez (Universidad Autonoma de Madrid (ES))  
09:45 CMS (remote via Zoom) - Si Hyun Jeon (Boston University (US))  
10:00 LHCb (remote via Zoom) - Tom Hadavizadeh (Monash University (AU))  
10:30 --- Coffee break ---
11:00
Updates from event generators and related tools - Leif Lönnblad (Lund University (SE)) (until 12:30)
11:00 Herwig updates - Simon Platzer (University of Graz (AT))  
11:15 Pythia news - Dr Ilkka Helenius (University of Jyväskylä)  
11:30 Updates from Sherpa - Daniel Reichelt (CERN)  
11:45 The future of MadGraph - Theo Heimel (UCLouvain)  
12:00 Rivet updates - Christian Gutschow (UCL (UK))  
12:15 Contur news - Jonathan Butterworth (UCL)  
09:00
Sharing of event samples between experiments - Enrico Bothmann (CERN) (until 09:45)
09:45
Updates on code acceleration - Stefan Roiser (CERN) (until 11:00)
09:45 Madgraph plugin for hardware acceleration - Zenny Wettersten (CERN)  
10:10 Pepper parton level event generation - Enrico Bothmann (CERN)  
10:35 GAPS, GPU-Amplified Parton Shower - Mike Seymour (The University of Manchester (GB))  
11:00 --- Coffee break ---
11:30
Sustainability of the MC toolchain - Dmitri Konstantinov (Chulalongkorn University (TH)) (until 12:45)
11:30 MC community vision & asks - Frank Martin Krauss  
11:45 Community MC tools: sustainability lessons and challenges - Andy Buckley (University of Glasgow (GB))  
12:00 Experiments’ perspective (common presentation) - John Derek Chapman (University of Cambridge (GB)) Gloria Corti (CERN)  
12:15 HSF: Vision and Role in MC Toolchain Sustainability - Saptaparna Bhattacharya (Southern Methodist University (US))  
12:30 EP-SFT: Mandate and Role - Gerardo Ganis (CERN)  
PM
12:30 --- Lunch break ---
14:00
Tuning issues - Leif Lönnblad (Lund University (SE)) (until 15:40)
14:00 Intoduction and Pythia plans - Leif Lönnblad (Lund University (SE))  
14:10 Tuning the rope model to ALICE data (via Zoom) - Lorenzo Bernardinis (Universita e INFN Trieste (IT))  
14:25 Non-perturbative modelling and tuning in Sherpa - Frank Martin Krauss  
14:40 Thoughts on cutoffs and tuning - Simon Platzer (University of Graz (AT))  
14:55 ATLAS tuning - Baris Tuncay (University of Oxford (GB))  
15:10 CMS tuning - Kyle Cormier (CERN)  
15:25 Discussion about possible tuning sub-group  
15:40 --- Coffee break ---
16:00
Progress towards (N)NLL parton showers - Pier Francesco Monni (CERN) (until 18:00)
16:00 Status update from PanScales - Melissa Corona van Beekveld (Nikhef National institute for subatomic physics (NL))  
16:25 Status update from Herwig - Mike Seymour (The University of Manchester (GB))  
16:50 Status update from Alaric - Daniel Reichelt (CERN)  
17:15 Status update from Apollo - Christian Preuss (University of Goettingen)  
17:40 Status update from CVolver - Simon Platzer (University of Graz (AT))  
18:00 --- Reception ---
12:45 --- Lunch break ---
14:00
Negative weights, variation and biasing - Michelangelo Mangano (CERN) (until 15:45)
14:00 Machine learning applications to negative-weight reduction - Andrea Valassi (CERN) Stefano Frixione (INFN)  
14:25 Negative weight suppression: Quantifying improvements and distortions - Jeppe Andersen (IPPP, University of Durham)  
14:50 Negative weight elimination: ESME - Dr Alexander Karlberg (CERN)  
15:15 Neural Refinement of Sample Weights - Dennis Noll (Stanford University)  
15:45
Wrap-up and future plans (until 16:05)