A Collection of Matching Benchmarks

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(ttbar plus Jets study)
Current revision (07:31, 16 June 2009) (view source)
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**** eg. Z + >= 2 jets with pT>100 GeV: delta_phi JJ, pT_Z (important early data; bg for missing E for SUSY; sensitive to UE)
**** eg. Z + >= 2 jets with pT>100 GeV: delta_phi JJ, pT_Z (important early data; bg for missing E for SUSY; sensitive to UE)
*** Hierarchies: One high scale + >= 2 objects at lower scale, for a small and a large scale separation
*** Hierarchies: One high scale + >= 2 objects at lower scale, for a small and a large scale separation
-
**** eg. two 400 GeV jets + one 100 GeV jet
+
**** eg. one 400 GeV jet + two 100 GeV jets
**** eg. Heavy Higgs (800 GeV) + two 400 GeV jets + one 100 GeV jet
**** eg. Heavy Higgs (800 GeV) + two 400 GeV jets + one 100 GeV jet
*** Separately check FSR matching from ISR matching?
*** Separately check FSR matching from ISR matching?
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* MLM Matched (Fabio + Roberto Chierici)
* MLM Matched (Fabio + Roberto Chierici)
* CKKW (Stefan H. + Jan W.)
* CKKW (Stefan H. + Jan W.)
-
* MCFM (H+X, H+1 jet; H+2 jets + X) (John)
+
* MCFM (H+X, H+1 jet; H+2 jets + X) (Joey, John)
* HNNLO (Gunther)
* HNNLO (Gunther)
-
* HE + Matched (Jeppe, Peter)
+
* HYPERJET (Jeppe, Peter)
= Radiation in WBF: comparison =
= Radiation in WBF: comparison =
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= Radiation in gg->H: mt finite vs mt->infty =  
= Radiation in gg->H: mt finite vs mt->infty =  
 +
* (Joey, Jeppe)
* Higgs + 1 Jet (MCFM) LO + finite mt
* Higgs + 1 Jet (MCFM) LO + finite mt
* Higgs + 2 jets (VBF@NLO) LO + finite mt
* Higgs + 2 jets (VBF@NLO) LO + finite mt
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** pT of the leading jet
** pT of the leading jet
** Decorrelation
** Decorrelation
-
* (Jeppe)
 
= Radiation in W+jets =  
= Radiation in W+jets =  
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= ttbar plus Jets study =
= ttbar plus Jets study =
-
* see [[Ttbar_plus_jets_study]]
+
* see [[Ttbar plus jets study]]

Current revision

Aim: Estimate Uncertainties

Contents

Radiation in gg->H: comparison

Plots

  • Higss Masses: 120, 200, 400
  • Single Inclusive: H pT, H eta
  • Jets (fast-jet: anti-kT? kT? ... ?)
    • Jet distributions
      • Jet rates
      • Jet pT distributions
      • Jet eta distributions
      • Jet Masses
      • Volcano plot
    • Jet-jet distributions
      • Delta(eta), Delta(R)
      • Jet Rate Ratios
    • Pathological Phase Space Points (Jeppe, Matt, Peter)
      • Jet Masses -- sensitive to resummation
        • eg. Jet mass distribution in direct photon at pT = 100 GeV, 600 GeV, 1.2 TeV
        • eg. Jet mass in dijets (background for boosted W/Z's, tops, Higgs, new physics...)
      • Higgs/Z + >= 2 jets at low Higgs pT
        • eg. Z + >= 2 jets with pT>100 GeV: delta_phi JJ, pT_Z (important early data; bg for missing E for SUSY; sensitive to UE)
      • Hierarchies: One high scale + >= 2 objects at lower scale, for a small and a large scale separation
        • eg. one 400 GeV jet + two 100 GeV jets
        • eg. Heavy Higgs (800 GeV) + two 400 GeV jets + one 100 GeV jet
      • Separately check FSR matching from ISR matching?

Tools

  • MC@NLO (Gunther)
  • POWHEG (Keith, Carlo)
  • PYTHIA (Steve)
  • MLM Matched (Fabio + Roberto Chierici)
  • CKKW (Stefan H. + Jan W.)
  • MCFM (H+X, H+1 jet; H+2 jets + X) (Joey, John)
  • HNNLO (Gunther)
  • HYPERJET (Jeppe, Peter)

Radiation in WBF: comparison

As above, modulo

  • WBF
    • Cuts: 2 Jets with pT > 0.4 in opposite hemisphere and Delta(y) > Delta(y)_min = 4.0
    • Observables:
      • Jet rates vs Delta(y) (for which jet pT?)
      • Ratios of jet rates
      • pT of jets
      • Delta(eta) jof ets
      • Decorrelation
      • Zeppenfeld Plot

Radiation in gg->H: mt finite vs mt->infty

  • (Joey, Jeppe)
  • Higgs + 1 Jet (MCFM) LO + finite mt
  • Higgs + 2 jets (VBF@NLO) LO + finite mt
  • Parton-Level plots
    • pT Higgs, eta
    • pT of the leading jet
    • Decorrelation

Radiation in W+jets

  • W + >= 2 jets
  • <cos(phi)> vs Delta(y) for various kinds of approaches
  • (Steve)

ttbar plus Jets study

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