FCCAnalysis Walkthrough��3^rd May 2023�

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Sarah Williams (University of Cambridge) and Roy Lemmon (STFC Daresbury Laboratory)

FCC-hh UK hackathon- 3^rd May 2023- UCL

Introduction

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The ”FCC” feasibility study was launched in 2021, aiming to provide key input by 2025 ahead of the next European Strategy Update

FCC-hh UK hackathon- 3^rd May 2023- UCL

Introducing ourselves (from an FCC perspective)

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Sarah

Roy

• This year- supervised masters project on FCC-ee in LLP group.

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• FCC BSM MC coordinator.

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• Keen to have projects on FCC-hh academic year 2023-24.

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• FCC week LOC (aside: the ECR session of FCC week will be open to non-registrants- please encourage interested ECRs in your group to connect: https://indico.cern.ch/event/1280385/)

• Interested in Higgs self-coupling
• Involved with FCC-ee, in particular the Higgs WG
• Last two years co-supervised with Roberto Salerno (LLR Paris, CMS) the Masters Thesis of Nico Harringer (LLR Paris/ETH Zurich) on Higgs self coupling from single Higgs measurements with the FCC-ee. Successfully defended last August. Now doing his PhD in CMS at ETH.
• Keen to have projects on FCC-hh (and FCC-ee) academic year 2023-24.

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FCC-hh UK hackathon- 3^rd May 2023- UCL

This session

• This presentation aims to avoid duplication of material available elsewhere whilst (hopefully) being accessible to those new to FCC.
• The aim is to demonstrate how ~ easy it is to get ramped up in the FCC analysis framework and highlight areas where work still needs to be done.
• In preparing this tutorial I came across a lot of unexpected obstacles- hopefully by building a community we can share resources/ generate a pool of expertise

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https://github.com/HEP-FCC

This in itself says a lot!

FCC-hh UK hackathon- 3^rd May 2023- UCL

Useful links

• FCC twiki page: https://twiki.cern.ch/twiki/bin/view/FCC/WebHome
• FCC software tutorial: https://hep-fcc.github.io/fcc-tutorials/master/software-basics/README.html
• Structure of EDM4HEP input files: https://hep-fcc.github.io/fcc-tutorials/master/fast-sim-and-analysis/FCCAnalysesProblemsAndSolutions.html#structure-of-edm4hep-files
• FCC software help: https://fccsw-forum.web.cern.ch first point of call for questions or support.
• FCC simulation database for centrally produced samples: http://fcc-physics-events.web.cern.ch/fcc-physics-events/

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FCC-hh UK hackathon- 3^rd May 2023- UCL

Overview of analysis workflow

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Next couple of slides taken from:

https://indico.cern.ch/event/1244371/contributions/5305335/attachments/2635199/4558748/FCC-SnC-USFCC-BNL-25Apr2023-Overview.pdf

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FCC-hh UK hackathon- 3^rd May 2023- UCL

FCCAnalysis software

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https://root.cern/doc/master/classROOT_1_1RDataFrame.html

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Reading up on RDataFrames is helpful to run the FCC software efficiently…

FCC-hh UK hackathon- 3^rd May 2023- UCL

EDM4HEP model

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https://edm4hep.web.cern.ch

…provides a generic EDM for future experiments.

FCC-hh UK hackathon- 3^rd May 2023- UCL

This tutorial

• Aimed to start from the discussion at the FCC-hh-UK workshop last year: https://indico.cern.ch/event/1147914/ and have a go at running some of the Liverpool examples: https://gitlab.ph.liv.ac.uk/msullivan/fcchh-liverpool in the “updated” FCC analysis workflow.
• I have a very rough skeleton that works- we can have a look today and explore how these could be expanded to do more detailed performance studies: https://github.com/sarahlouisewilliams/FCCAnalyses/tree/fccuk-hhtutorial-swmay2023/examples/FCChh/HH_bbtautau

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FCC-hh UK hackathon- 3^rd May 2023- UCL

Summary of workflow

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Now lets look though the code…

(1) Provides (skimmed) ntuples for further analysis. These outputs could be used with other packages (i.e. ML etc)

(2) Apply further selections, fill histograms (with scaling). Print cutflow.

(3) Make final plots with selections applied.

Note: within the coming days I should have some updated code to do the b-tagging/ tau-ID and different jet selections :) watch this space…

FCC-hh UK hackathon- 3^rd May 2023- UCL

Quick note

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https://hep-fcc.github.io/FCCAnalyses/doc/latest/index.html

If you can’t access the FCC inputs today, you can skip “stage 1” but still run the rest :)

FCC-hh UK hackathon- 3^rd May 2023- UCL

Points for the discussion session

• Considerations for “scalability” to full analysis and running on batch:
• Fixes needed for FCCAnalysisRun.py to track the number of entries processed when filtering files (https://fccsw-forum.web.cern.ch/t/potentialbug-in-fccanalysisrun-py/172 )
• Functionality for non-custom jet reconstruction, hadronic taus and b-tagging WPs: custom c++ analysers needed (discussions ongoing with Birgit Sylvia Stapf and Michele Selvaggi following discussions with FCC SW coordinators).
• What could we do in the UK by pooling resources/ working together?

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FCC-hh UK hackathon- 3^rd May 2023- UCL