HSF Plans for 2023

Preamble
- Reference Presentations
- Previous Plans
Overall HSF Activities
- General Meeting Series
- Workshops
Working Groups

Preamble

In the first few months of 2023 the HSF again established some high-level plans and goals for the year ahead. While none of these are cast in stone, we remain agile to adapt to new opportunities and circumstances throughout the year. This planning is a useful guide to our activities.

We encourage experiments and projects to take a look at these and always welcome any suggestions about how to make the HSF more effective and useful for HEP.

Reference Presentations

See the slides that were presented at HSF Coordination meetings on 19 January, 2 February, 16 February and 30 March

Previous Plans

Overall HSF Activities

General Meeting Series

Continue with regular coordination meetings every 2 weeks (on the odd-numbered weeks of the year by default).
The Compute Accelerator Forum, co-organised with SIDIS and openlab, has established itself as a strong series of meetings with good turnout, focusing on new compute architectures. We shall continue to find interesting topics to present.
- As there is a significant cross-over with the WG activities in many places, we should consider joint organised meetings when appropriate
Monthly Software and Computing Roundtable meetings, co-organised with JLab and BNL, cover general topics of interest and the engagement of the HSF increased through 2022. We should continue to advertise the meeting and use this as an engagement opportunity for speaking to Nuclear Physics colleagues.

Workshops

As travel restrictions have now largely eased, we can organise more workshops as in-person events, which we know are extremely productive, after last year’s Analysis Ecosystem II meeting
In particular, we plan a pre-CHEP workshop with WLCG, that should focus on common topics between software and computing infrastructure
- Use of non-x86 hardware on at WLCG sites
- Analysis Facilities

See below for PyHEP and Generators workshop ideas.

Working Groups

Physics Event generators

Priorities:
- Event generation:
  - Event generation for LHC and HL-LHC
  - Cross-cutting aspects with other experiments in NHEP
- MCEG R&D:
  - Cutting-edge software technology
  - Standards for shared elements
Working group discussions:
- More engagement in the WG?
- Follow up on LHCC and Snowmass/P5
- New documents?
Workshop planning:
- MC4EIC 2023 (tba)
- Follow up of the 2018 workshop?
Training:
- Tuning tutorial (co-organize with Training WG)

PyHEP

PyHEP 2023

The 5th anniversary workshop!
Online workshop, we converged on the week of October 9‒13
- To be advertised soon, but see next slide …
Targeting as always the broader audience of developers and physicists:
- Idea of connecting Python users in HEP

PyHEP Dev Workshop

New this year: In person workshop for Python package developers @ Princeton, USA
- 25-29 July, at Princeton, aiming for ~50 people
Idea to get developers getting their software products to work together as a coherent ecosystem, and plan a coherent roadmap and make priorities for the upcoming year

Topical Meetings for 2023

Thinking about possibility to do joint meetings with IRIS-HEP / other HSF WGs or other interested parties
- Agreed already with IRIS-HEP
We need to define better the goal of the meetings:
- To introduce users to new packages?
  - Now harder to find packages that are at a stage where there is a package that is on the verge of becoming mature
- To connect to various working groups, analysis groups, experiments to connect users?
- Possible to have better overlap with training working group as well

Detector Simulation

Following up on developments of or in the area of
- Opticks
- FLUKA
- Simulation on GPUs and co-processors in general
- ML/AI related to simulation (including training on Geant4 samples)
- Fast Simulation
- Differentiable simulation
- Simulation of future experiments (at EIC, FCC, and others)
Techniques used to optimize geometry
Optimization of Geant4 cuts and materials as done by experiments
Simulation of effects like space charge
Topics overlapping with other working groups:
- Integration of Geant4 and Event Generators
  - E.g., in the area physics models, processes, including exotic physics/particles
- Sharing experiences of extending Geant4 by experiments
- Integration of processing frameworks, Geant4 as well as Event Generators
  - Simulation aspects of ACTS (A Common Tracking Software)
- Integration of Geant4 into Python based frameworks
  - More generally, Python/Julia bindings in simulation packages

Frameworks

Improve interactions with other WGs
- Accelerator usage, Simulation, …
Potential topics for meetings/discussions
- Integration of accelerators into experiment frameworks
  - Allen and Gaudi in LHCb
  - Integration of CUDA and Alpaka (and beyond) in CMSSW
- Incorporation of ML models into frameworks. Management of ML model files
- New language features
- New parallelism libraries as a potential long-term alternative to TBB
  - E.g., HPX
- Key4Hep

Software Training

Switch to intermediate target audience and HEP-specific tools
Teach more scikit-HEP & IRIS-HEP packages
- Active community that is interested in growing its user base
- Use IRIS-HEP fellowships to expand training fellowships
Coordinate with new initiatives from the Research Software Engineering World
Be more open to materials of different formats and from different authors
State of Training Survey: identify blind-spots, start subgroups to work on them
Improve liaisons to experiments
Report experiences in Journals like JOSE
Hybrid training events
Expand Training Center
- Vision: One website as entry point for all HEP related training material
Concrete Events
- Carpentry workshops (still included in subscription):
  - How can we lower attrition?
  - How do we bundle carpentry intro together with our previous “last day” (if at all) → should probably be separate indico agenda
- Analysis preservation
  - Second event in summer for scale?
  - Now that all videos are in place, only need to find mentors for last day, so relatively easy
- ML + GPU
  - Already have material, so should be somewhat easy to set up

Software Tools and Packaging

Continue Spack Discussions with contributions from Spack Developers and Experiments
- Update on EESSI
- Python packaging
Together with other Working Groups:
- C++ language features
- Spack training material

Data Analysis

Data compression
- several speakers and novel areas identified
Open data
- LHCb now has significant open data set
- Key for AGC, can serve as common ground for “challenges”
End user survey of data analysis approaches across experiments
- Needs careful design & large representative set of responses
- No recent comprehensive results available -> good to get overview of field
Set up a “Systematics challenge”
- Small analysis task to probe handling of systematic uncertainties
- Needs careful design (scope, effort involved to contribute)
- Would naturally frame further discussions on this topic following AEWII

Reconstruction and Software Triggers

Topics
- Biased triggering and missed physics:
  - Experiment TDAQ design and trigger/reco biases
  - Strategies to “leave no stone unturned”
- Sustainability: Impact, indicators, better practices
- Lessons learned” from new/upgraded experiments after 1-2 years of data-taking
Have a kick-off meeting - confirmed for 26 April
- Introduction to the group
  - Highlight differences & commonalities among experiments
  - WG as place where to discuss issues that someone else may have already solved
- List of plans - old survey & new ideas
- Open the floor to proposals from participants
  - Make a google-doc available in advance