NNPDF collaboration and code meeting

20 Nov 2017, 09:00 → 24 Nov 2017, 18:00 Europe/London

Monday 20 November

09:00 → 09:15 Introduction

Speaker: Stefano Forte (Università degli Studi e INFN Milano (IT))

09:15 → 11:00 New experimental data

i) List of topics to discuss:
- Which datasets do we want to include for NNPDF4.0 and in which order?
- Make list of experiments and prioritize them
- In particular, what LHC measurements at 13 TeV can/should include?
- New processes: direct photons, single top, D mesons, etc
ii) Joint brainstorming
iii) Define milestones
iv) Agree on short term tasks and who does what

11:00 → 11:15 Break

11:15 → 13:00 Theory issues

i) List of topics to discuss:
- MHOU: implementation of scale variation
- MHOU: implementation of the extra uncertainty on the fit and way to estimate it
- Further uses and dissemination of fits with scale variation
- Inclusion of EW corrections (including photon-induced)
- Approximate N3LO
ii) Joint brainstorming
iii) Define milestones
iv) Agree on short term tasks and who does what

13:00 → 13:30 Lunch

13:30 → 15:15 Methodological improvements

i) List of topics to discuss:
- Improved minimization: CMA-ES validation
- Improved param.: fitting preprocessing, testing quadratic NNs
- How we can make positivity work
- Closure tests revisited?
ii) Joint brainstorming
iii) Define milestones
iv) Agree on short term tasks and who does what

15:15 → 15:30 Break

15:30 → 17:00 Side projets

i) List of topics to discuss:
- Polarized PDFs
- Fragmentation functions
- Nuclear PDFs
- Fits with resummation (large-x, small-x, joint)
ii) Joint brainstorming
iii) Define milestones
iv) Agree on short term tasks and who does what

17:00 → 17:15 Break

17:15 → 18:45 General Brainstorming

The short, medium, and long term future of the Collaboration

Tuesday 21 November

09:00 → 10:00 Interviewing new PhD students

Individual and collective meeting with MU, NH and SC.
Aims: understand the background of each student, determine a personalized training background.

10:00 → 12:00 Code overview

• NNPDF methodology summary
  -- latests releases
• Code overview:
  -- components
  -- installation procedure
  -- infrastructure
  -- short tutorial

12:00 → 13:00 Lunch

13:00 → 18:00 Code meeting - Issues Overview

• Quick summary of the issues to be discussed
• Organizing development and manpower
• Preparing the code for future

Wednesday 22 November

09:00 → 18:00 Core status and required actions

• Overview of the latest pull requests
• Collecting complains and discussing open issues
• Decide short and long term milestones towards NNPDF4 and N3PDF interfacing

Thursday 23 November

09:00 → 12:00 APFEL and APFELcomb roadmap

• Summary and status of the code
• Integrating APFEL/APFEL++ integration
• FK tables, storage, generation, repositories
• Future improvements

12:00 → 13:00 Lunch

13:00 → 18:00 Validphys2

• Summary and status of the code
• Status of users and devs documentation
• Open issues and required features
• Deciding the integration policy with other code components
• The future of vp2

Friday 24 November

09:00 → 18:00 Free discussion / work / flights