Welcome and Aims

• Peter Skands (Monash University (AU))

Including discussion of main goals for the week.

Beam Remnants & Cosmic Rays - Status and Questions

• Torbjorn Sjostrand (Lund University (SE))

String Junctions (& Closepacking) - Status and Questions

• Javira Altmann

General Discussion of Physics and Issues related to Hadronization

Angantyr

• Ilkka Helenius (University of Jyväskylä)

EIC and Gleipnir - Status and Plans

• Leif Lönnblad (Lund University (SE))

Nuclear Geometries

• Christian Bierlich
• Christian Bierlich (Lund University (SE))

General Discussion of Physics and Issues related to Heavy Ions

GPU Tutorial

• Leif Lönnblad (Lund University (SE))
• Philip Ilten (University of Cincinnati (US))
• Michal Kreps (University of Warwick (GB))

Pythia 8.312

• Philip Ilten (University of Cincinnati (US))

Discussion of Future Roles & Funding Opportunities

Total and Diffractive Cross Sections

• Torbjorn Sjostrand (Lund University (SE))

Careful discussion of Hadronization variations & general variations, related to #210.

Rivet 4 & Yoda 2

• Christian Gutschow (UCL (UK))

Errors on Errors

• Enzo Canonero (University of London (GB))
• Glen Cowan (Royal Holloway, University of London)

Preliminary Studies

• Adil Jueid (Institute for Basic Science)

Self-Introductions: B. Tuncay & L. Bernardinis (Ongoing Tuning Efforts)

• Baris Tuncay (University of Oxford (GB))
• Lorenzo Bernardinis (Universita e INFN Trieste (IT))

MCPLOTS - Update and Plans

• Natalia Korneeva (Monash University (AU))
• Anton Karneyeu (Russian Academy of Sciences (RU))

Work and Discussions related to Tuning

• Philip Ilten (University of Cincinnati (US))
• Peter Skands (Monash University (AU))

- Errors on Errors - Tunes as Command Files - PDF Updates - Needs of different communities: From Forward Physics, to B Decays, to FCC-ee, to Hard and Soft Processes at the LHC, to Heavy Ions, EIC, and Cosmic Rays? - Studying and Reducing Correlations among parameters? Refactorizations, Reparametrizations? - Tuning and Matching/Merging applications. - Status of Autotunes now that both Bellm and Gellersen have left? - Tuning and PDFs (and orders of PDFs) - ...

Plans for New Pythia Tuning

• Stephen Mrenna
• Peter Skands (Monash University (AU))

Getting to a stage where we can use Reweighting and Professor together

New C++ Version

• Philip Ilten (University of Cincinnati (US))

User Interface to Fragmentation: Discussions and Work

Discussions and Work - Expect continuations from Monday/Tuesday discussions.

Discussions and Work - Fast Glauber from Angantyr to Cosmic-Ray modelling. - Matching/Merging related issues - LHE related issues. - Clang format. - CERN gitlab vs gitlab.com

PanScales: Intro & Experience with Pythia Interfacing

• Melissa Corona van Beekveld (Nikhef National institute for subatomic physics (NL))

Pythia Contrib (& Tutorial?)

• Philip Ilten (University of Cincinnati (US))

Self-Introductions: Ludo Scyboz, Basem El-Menoufi, and Jack Helliwell

PanScales-Pythia Interface: Discussions

Discussions and Work - Numerical accuracy (aiming for Cosmic-Ray energy stability and log tests).Tricks from PanScales: Replacing dot products by cross products, ...

MiNNLOPS (& Pythia)

• Silvia Zanoli (University of Oxford)

Discussions and Work

Particle Theory Seminar by Ilkka Helenius

• Ilkka Helenius (Helsinki Institute of Physics (HIP)-Univ. of Helsinki, Fac. of S)
• Ilkka Helenius (University of Jyväskylä)

Room: Simpkins Lee Room https://zoom.us/j/98685957349?pwd=Z0ZJUE9Odi9MYmlDSDIvYy8zMDVQQT09

Future

• Peter Skands (Monash University (AU))

Collaboration Roles Gitlab.com vs CERN Gitlab?

CR Optimisations & Static Code Analysis

• Philip Ilten (University of Cincinnati (US))
• Michal Kreps (University of Warwick (GB))

Discussion on Optimisation and related issues - Further CR Optimisations (and related)? - Identifying MPI bottlenecks. E.g., first-interaction pT and b sampling. - Systematic Approach to Identifying and Addressing Optimisation Issues? - Inclusion of various compute-intensive intializations as command files? - Other Issues related to SCA and Optimisations - Instruments for Mac (alternative to valgrind) - Studying and Reducing Correlations among parameters? Refactorizations, Reparametrizations? - Status and follow-ups on tuning

EvtGen & Pythia

• Michal Kreps (University of Warwick (GB))

QED in Hadron Decays

• Peter Skands (Monash University (AU))

Discussion & Work Including other aspects related to QED / EW physics? Including other aspects related to hadron-decay physics?

Issue Desk and Informal Follow-Ups Gitlab.com vs CERN Gitlab?