Les Houches

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People interested: Simone, Simon, Andrzej, Matt, Jenifer, Stefan K., Andreas, Maria V.,  ...

==== Plan/Discussion ====

  * Start with existing Rivet analyses as first step, and compare current MC

  * Suggest/study new observables -- correlations among jet constituents, hadronic composition of q/g jets

  * double-differential w.r.t jet axis, different jet axis definitions?

More in
https://www.overleaf.com/project/648ab3e1c164ede47c68c368

==== Rivet plugins to study to explore new observables ====

Rivet routine growing here: https://gitlab.com/jroloff/leshouches2023

==== Rivet plugins to compare to existing measurements ====
https://codimd.web.cern.ch/ng8P7AjsRHGUMEKheMibMQ?view

Rivets for LH23 JSS Survey

    Let’s just use 13 TeV analyses
    Let’s limit ourselves to q/g (dijets / multijets / Z+jets) ?
        But CMS ttbar measurement has a very pure quark jet selection…

ATLAS
Multijets (higher priority)

    ATLAS_2020_I1790256 – 13 TeV Lund jet plane
        Dijets, pT > 675 GeV
    ATLAS_2020_I1808726 – 13 TeV Event Shapes (Thrust etc.)
        Multijets, HT2 > 1 TeV
    ATLAS_2019_I1772062 – 13 TeV Soft-drop mass, rg, zg
        Dijets, pT > 300 GeV
    ATLAS_2019_I1724098[MODE=“DJ”] – 13 TeV jet tagging observables
        Dijets, pT > 400 GeV
    ATLAS_2019_I1740909 – 13 TeV nTrk, fragmentation functions
        Dijets, pT > 300 GeV
    ATLAS_2018_I1634970 – 13 TeV Inclusive Jets ?
        Inclusive jets, pT > 100 GeV

Multijets (lower priority)

    ATLAS_2021_I1913061 – 13 TeV exclusive b-fragmentation (B->J/Psi K)
        Dijets, pT > 50 GeV
    ATLAS_2018_I1711114 – 13 TeV g(bb)
        Dijets, pT > 50 GeV

ttbar (lower priority?)

    ATLAS_2019_I1724098[MODE=“TW”] – 13 TeV jet tagging observables (ttbar)
        boosted W, pT > 200 GeV; boosted top, pT > 350 GeV

CMS
Multijets (higher priority)

    CMS_2021_I1920187 [MODE=“DIJET”] angularities in Z+jet and multijets
        pT > 50 GeV binned up to 1 TeV
    CMS_2018_I1682495 jet mass in dijets
        pT > 200 GeV
    CMS_2021_I1972986 13 TeV inclusive jets
        pT > 97 GeV

Z+jets (higher priority)

    CMS_2021_I1920187 [MODE=“ZJET”] angularities in Z+jet and multijets
        pT > 50 GeV binned up to 1 TeV

ttbar (lower priority?)

    CMS_2018_I1690148 jet substructure observables in ttbar
        pT > 30 GeV

==== Rivet plugin to dump root tree for ML studies ====

First version from Huilin:
https://github.com/lh23-jss/lh23-jss-rivet

JET_NTUPLE_QG:MODE=DIJET:JET_R=0.4 for q-vs-g

JET_NTUPLE_QG:MODE=ZJET:JET_R=0.4 for q-vs-g

JET_NTUPLE_QG:MODE=DIJET:JET_R=0.8 for W-vs-q/g

JET_NTUPLE_QG:MODE=WZ:JET_R=0.8 for W-vs-q/g

==== Samples ====

dijets with pT>50 (for comparison with angularities measurement, q-vs-g-ML studies)

Z(mumu)+jet with pT>50 (for comparison with angularities measurement,  q-vs-g-ML studies)

dijets with pT>550  (for comparison with Lund plane measurement, W-vs-q/g-ML studies)

Z(nunu)W(qq) with pT>550 (for W-vs-q/g-ML studies)

(also used for https://phystev.cnrs.fr/wiki/2023:groups:smjets:jets-and-ml:start)

==== Generator setups ====

Sherpa NLO + angle/dipole,cluster/string (Daniel) 
Example files: https://ippp.dur.ac.uk/~dreichelt/LesHouches/

Herwig LO + NLO + angle/dipole,cluster/string (Andrzej, Stefan K)

Powheg+Pythia NLO (Maria)
Les Houches

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