LHC Higgs Cross Section Working Group 2 - Higgs Properties

Organization:

Topics:

  • STXS & 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
    • Note on STXS->EFT mapping (available)
    • Standard procedure for combined fit to Higgs+EW+Top data (for discussion)

Roadmap:

Topic ShortDescription Deliverables Timescale Notes Status Contact
STXS & differential XS STXS stage 1.1 TH uncertainties treatment recommendation Note/journal Early summer 2019 to be ready for summer 2019 conferences Not started yet Frank Tackmann
STXS & differential XS STXS stage 1.1 binning recommendation Note/arXiv/(journal) + Rivet code Early 2019 to be ready for Moriond 2019 In progress Frank Tackmann
PO PO Summary for experiments. Scenarios for h>4l decays. Mapping to other frameworks. Note Early 2019 see presentation [*] Being written David Marzocca
EFT BSM Benchmarks and mapping to EFT. Determine benchmarks sensitive to differential and coupling measurements, define relevant EFT parameters Note Early 2019 Four contributions in progress; more contributions welcome Being Finalised Francesco Riva David Marzocca
EFT Interpretation Workflow Summary: Processes, Operators and BSM Interpretations Note Early 2019 Addendum to BSM Benchmarks note Not started yet  
EFT Fit to STXS using a standardized mapping of STXS stage 1.0 Note/(arXiv) Summer 2019 Internal note available with HEL model, follow-up public note ongoing using SMEFTsim Being Finalised Chris Hays
EFT Global Fit in EFT Framework; inclusion of top and Electroweak measurements Note End 2019   In plan  
EFT High-Energy Higgs Probes: Longitudinal multiboson processes as tests of Higgs physics Note Early 2020   Not started yet Francesco Riva David Marzocca
[*] PO presentation by D.Mrazocca

Recent meetings:

Link to the dedicated indico category: WG2: Higgs Properties

  • Joint VBF & fid/dif/STXS meeting: STXS qq→Hqq binning [[https://indico.cern.ch/event/783146/][January 17]
  • WG2 session in Dec 2018 general meeting [[https://indico.cern.ch/event/740110/][December 10]
  • 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

Tools:

  • STXS & Differential XS
    • The STXS Rivet code
      • Download with a CERN account using svn+ssh://svn.cern.ch/reps/lhchiggsxs/repository/TemplateXS <http://svn.cern.ch/reps/lhchiggsxs/repository/TemplateXS>
      • Download this tar ball if you do not have a CERN account

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

Past projects:

-- AdamFalkowski - 28 Oct 2014

  • 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: r33 - 2019-02-25 - PredragMilenovic
 
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