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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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Revision as of 07:12, 16 June 2009

Aim: Estimate Uncertainties

Contents 1 Radiation in gg->H: comparison 1.1 Plots 1.2 Tools 2 Radiation in WBF: comparison 3 Radiation in gg->H: mt finite vs mt->infty 4 Radiation in W+jets 5 ttbar plus Jets study

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. 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?

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

• 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
• (Jeppe)

Radiation in W+jets

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

ttbar plus Jets study

• see Ttbar plus jets study