LHC Higgs Cross Section Working Group 2 - Higgs Properties


  • Group meetings: WG2: Higgs Properties
  • Mailing list: lhc-higgs-properties@cernNOSPAMPLEASE.ch
  • git area : https://gitlab.cern.ch/LHCHIGGSXS/LHCHXSWG2
  • Conveners: Daniele Barducci (INFN / Rome - Sapienza), Nicolas Berger (Annecy LAPP), Mauro Donega (ETH Zurich), Ken Mimasu (King’s College London)
  • Previous conveners: Giuliano Panico (Firenze), Jorge de Blas (Granada), Predrag Milenovic (Belgrade), Marco Delmastro (Annecy), Francesco Riva (CERN), David Marzocca (Trieste), Mingshui Chen (Bejing), Chris Hays (Oxford), Adam Falkowski (Orsay-LPT), Gino Isidori (Zürich), Michael Dührssen (CERN) Andre David (CERN)


  • STXS & fiducial/differential XS
    • Recommendations for the fiducial and differential (Fid/DiffXS twiki) and simplified template cross sections (STXS) measurement and uncertainties computation.
    • Dedicated Fid./Diff./STXS twiki (with more details and contact emails).

  • PO
    • Overview of effective POs and tools for extraction from measurements
    • Reweighting code to apply to existing MC
    • HiggsPO model available in Madgraph with NLO QCD corrections for VH/VBF production

  • EFT
    • Tools: Implementation of Warsaw basis in FeynRules (available) with NLO QCD corrections in Madgraph (in development)
    • Validity (for discussion): defining the region of ci vs Lambda; square term gives an estimate of the uncertainty from higher powers of 1/Lambda
    • STXS->EFT mapping (available for HEL with SILH basis, in development for SMEFT with Warsaw)
    • Standard procedure for combined fit to Higgs+EW+Top data (for discussion, in coordination with other LHC Physics groups)
    • Initiative on establishing the EFT interpretation workflow guidelines/recommendations. A non-exhaustive list of aspects for discussion/clarification can be found here, together with google doc where anyone interested can sign-up for particular topics.


Topic ShortDescription Deliverables Timescale Notes Status Contact
STXS & differential XS STXS stage 1.2 and TH uncertainties treatment recommendation Note/journal (+ Rivet code?) 2020 To be ready in 2021 In Progress Frank Tackmann
STXS & differential XS STXS stage 1.2 binning recommendation Note/arXiv/(journal) + Rivet code Concluded arXiv, to be updated with Stage 1.2 Definitions and Rivet routine done, documentation TBD Frank Tackmann
STXS & differential XS STXS decay-side binning definition Note + Rivet code 2022 Draft note Ongoing Michael Dührssen-Debling
EFT BSM Benchmarks and mapping to EFT. Determine benchmarks sensitive to differential and coupling measurements, define relevant EFT parameters Note/arXiv Early 2019 Ready arXiv LHCHXSWG-2019-006 Francesco Riva David Marzocca
EFT Interpretation Workflow Summary: Processes, Operators and BSM Interpretations Note 2020-2021 Addendum to BSM Benchmarks note Started Jorge de Blas
EFT Fit to STXS using a standardized mapping of STXS stage 1.2 Note/(arXiv) Summer 2019 LHCHXSWG-2019-004 Concluded Chris Hays
EFT Global Fit in EFT Framework; inclusion of top and Electroweak measurements Note During 2021   In plan  
EFT High-Energy Higgs Probes: Longitudinal multiboson processes as tests of Higgs physics Note During 2021   Not started yet Francesco Riva David Marzocca
[*] PO presentation by D.Marzocca

Recent meetings:

Link to the dedicated indico category: WG2: Higgs Properties

  • WG2 fid/diff/STXS meeting: ggH stage 1.2 uncertainties 04/11/2020
  • Higgs measurements and their EFT interpretations 01/7/2020
  • [STXS] Meeting on Updates to Uncertainties for Stage 1.2 25/06/2020
  • EXP+TH LO/NLO EFT scheme discussion: 09/04/2020
  • WG2-related plenary & discussion sessions in Oct 2019 general meeting 16/10/19
  • STXS gg->H & ttH closure + diffXS variables discussion 16/9/19
  • STXS discussion on ttH & ggH binning (for stage 1.2) 24/7/19
  • STXS discussion at Les Houches 2019 12/6/19
  • ttH STXS binning discussion 6/6/2019
  • Joint VBF & fid/dif/STXS meeting: STXS qq→Hqq binning 17/1/19
  • WG2 session in Dec 2018 general meeting 10/12/18
  • WG2 fid/dif/STXS meeting: Presentation of results and STXS updates November 23
  • CP and dimension-8 EFT November 13
  • Validation and benchmarking of EFT tools June 14
  • STXS meeting May 17
  • WG2 session in March 2018 general meeting March 27
  • Benchmark scenarios February 23 (2018)
  • Winter meeting December 11 (2017)
  • WG2 session in July 2017 general meeting July 14
  • Joint EW+WG2 meeting July 10
  • STXS meeting July 6
  • Kickoff meeting May 8


  • EFT Interpretation Workflow Twiki page

  • EFT
    • Mapping of the STXS to HEL parameters
    • FeynRules implementation of the Warsaw basis (SMEFTsim)

Past projects


  • STXS.tgz: Revision 8941 of the STXS classification code
Topic attachments
I Attachment History Action Size Date Who Comment
Compressed Zip archivetgz STXS.tgz r1 manage 78.1 K 2018-05-15 - 08:27 ChristopherHays Revision 8941 of the STXS classification code
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Topic revision: r58 - 2022-05-20 - NicolasBerger
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