Julia for HEP Mini-workshop

Monday 27 Sept 2021, 15:00 → 18:45 Europe/Zurich

Benjamin Krikler (University of Bristol (GB)), Eduardo Rodrigues (University of Liverpool (GB)), Philippe Gras (Université Paris-Saclay (FR))

The PyHEP WG is launching a study of the potential Julia usage for HEP.

During this mini-workshop we will share the information which has already been collected, discuss the matters for which we need to share opinions, identify the questions that will require some work to be answered.

The workshop will focus on discussions and possibly practical work. The goal is the preparation of a report on the potential of Julia for HEP and recommendations on its usage.

The topics to be addressed are listed here.

Because of the nature of the workshop, the agenda of the day will involve depending on the interests of the participants and the ideas that come out during the event and its preparation.

Some resource on Julia that can be consulted before the workshop

• Official site and documentation: https://julialang.org/
• Learning the language: https://juliaacademy.com/
• HEP represented at the Julia computing conference with the example of a physics analysis using Julia
• A github corner: https://github.com/JuliaHEP
• Julia session at last PyHEP annual workshop

Minutes (CodiMD doc)

Recording of workshop (youtube)

1 Introduction

intro-julia4hep-20210927.pdf

List of Topics

The high-level, high-performace promise

2 Why Julia? - motivation and comparison to other languages.

Speaker: Oliver Schulz (Max Planck Society (DE))

why-julia slides.pdf

3 Report on performance tests

Speaker: Philippe Gras (Université Paris-Saclay (FR))

perf-julia4hep-20210927.pdf

4 Case study: Julia in a workgroup and a collaboration.

Speaker: Oliver Schulz (Max Planck Society (DE))

introducing-julia-into-groups slides.pdf

5 Julia and the first observation of Ω⁻_b → Ξ⁺_c K⁻ π⁻

Speaker: Mikhail Mikhasenko (Excellence Cluster ORIGINS)

spectroscopy_mmikhasenko.pdf

6 Discussion on usage of Julia as high-level language in HEP analysis and questions that need further investigations

Julia beyond last-step of Physics analysis: event generation simulation and reconstruction

7 Julia for large HEP experiment software framework. Points to be investigated.

5' introduction + discussion

Speaker: Stefan Kluth (Max Planck Society (DE))

juliainHEPprojects.pdf

8 Julia for phenomenology and event generators

5’ intro + discussion

Speaker: Alexander Moreno Briceño (Universidad Antonio Nariño)

Julia_for_Pheno.pdf

16:35 Make-your-own-tea break

Interface with other languages and HEP legacy

9 Interface of Julia with C++

Speakers: Oliver Schulz (Max Planck Society (DE)), Vasil Georgiev Vasilev (Princeton University (US))

CxxInterop.pdf

10 ROOT I/O, past and future

Speaker: Jakob Blomer (CERN)

ROOT I_O and Foreign Languages [v2].pdf

11 UnROOT.jl and some other HEP-specific libraries

Speakers: Jerry 🦑 Ling (Harvard University (US)), Tamas Gal (University of Erlangen / Erlangen Centre for Astroparticle Physics)

jerry-unroot-julia-hsf-2021.pdf.pdf

12 How an Awkward Array/Julia bridge can introduce HEP to Julia.

Speaker: Jim Pivarski (Princeton University)

pivarski-awkward-julia.pdf

13 Discussion on interfacing with legacy code and HEP data formats.

14 Review of the report outline and next steps

Report outline (outdated)

Updated outline