Difference: JetEtmissJetPerformanceQuarkGluon ( vs. 1)

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JetEtmissJetPerformanceQuarkGluon

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Performance of Quark/Gluon initiated jets

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[Jet response EMJES]

Jet response difference of isolated light-quark initiated and gluon initiated jets as a function of the true jet pT for anti-kt jets with R = 0.4 in the barrel calorimeter. Three different calibration schemes are shown: the EM+JES calibration. Results are shown in the PYTHIA MC11 sample (solid red circles), while empty markers represent results in the PYTHIA Perugia2011 sample (open black squares) and in Herwig++ (open blue circles). Jets are labeled as light-quark initiated or gluon initiated based on the generator event record.

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[Jet response GS]

Jet response difference of isolated light-quark initiated and gluon initiated jets as a function of the true jet pT for anti-kt jets with R = 0.4 in the barrel calorimeter. Three different calibration schemes are shown: the GS calibration. Results are shown in the PYTHIA MC11 sample (solid red circles), while empty markers represent results in the PYTHIA Perugia2011 sample (open black squares) and in Herwig++ (open blue circles). Jets are labeled as light-quark initiated or gluon initiated based on the generator event record.

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[Jet response LCW+JES]

Jet response difference of isolated light-quark initiated and gluon initiated jets as a function of the true jet pT for anti-kt jets with R = 0.4 in the barrel calorimeter. Three different calibration schemes are shown: the LCW+JES calibration. Results are shown in the PYTHIA MC11 sample (solid red circles), while empty markers represent results in the PYTHIA Perugia2011 sample (open black squares) and in Herwig++ (open blue circles). Jets are labeled as light-quark initiated or gluon initiated based on the generator event record.

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[Track multiplicity]

Distributions of the number of tracks associated to a jet for isolated light-quark induced and gluon induced jets with 160<pT<210 GeV and |eta|<0.8 in Pythia MC11.

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[Track Width]

Distributions of the track width for isolated light-quark induced and gluon induced jets with 160<pT<210 GeV and |eta|<0.8 in Pythia MC11.

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[Track multiplicity vs pt, MC based]

Average number of track associated to a jet for light-quark- (closed markers) and gluon-induced (empty markers) jets as a function of the reconstructed jet pT for isolated jets with |eta| < 0.8. Results are shown for PYTHIA MC11 (circles), PYTHIA Perugia2011 (triangles) and Herwig++ (squares). The error bars represent only statistical uncertainties.

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[Track width vs pt, MC based]

Average track width for light-quark- (closed markers) and gluon-induced (empty markers) jets as a function of the reconstructed jet pT for isolated jets with |eta| < 0.8. Results are shown for PYTHIA MC11 (circles), PYTHIA Perugia2011 (triangles) and Herwig++ (squares). The error bars represent only statistical uncertainties.

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[Track multiplicity vs pt, in situ extraction in MC]

Average number of tracks for light-quark- (solid marker) and gluon-induced (open marker) jets as a function of reconstructed jet pT for isolated jets with |eta| < 0.8. Results are shown for distributions obtained using the in situ extraction method in Monte Carlo simulation (circles), labeled jets in the dijet sample (triangles) and labeled jets in the $\gamma$-jet sample (squares). The error bars represent only statistical uncertainties.

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[Track width vs pt, in situ extraction in MC]

Average track width for light-quark- (solid marker) and gluon-induced (open marker) jets as a function of reconstructed jet pT for isolated jets with |\eta| < 0.8. Results are shown for distributions obtained using the in situ extraction method in Monte Carlo simulation (circles), labeled jets in the dijet sample (triangles) and labeled jets in the gamma-jet sample (squares). The error bars represent only statistical uncertainties.

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[Track multiplicity vs pt, in situ extraction in data]

Average track multiplicity for light-quark- (solid marker) and gluon-induced (open marker) jets as a function of reconstructed jet pT for isolated jets with |eta| < 0.8. Results are shown for distributions obtained using the in situ extraction method in data (circles), labeled jets in the dijet sample (triangles) and labeled jets in the gamma-jet sample (squares). The error bars represent only statistical uncertainties.

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[Track width vs pt, in situ extraction in data]

Average track width for light-quark- (solid marker) and gluon-induced (open marker) jets as a function of reconstructed jet pT for isolated jets with |eta| < 0.8. Results are shown for distributions obtained using the in situ extraction method in data (circles), labeled jets in the dijet sample (triangles) and labeled jets in the gamma-jet sample (squares). The error bars represent only statistical uncertainties.

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[Track multiplicity vs pt, in situ extraction in data]

Average track multiplicity for light-quark- (solid marker) and gluon-induced (open marker) jets as a function of reconstructed jet pT for isolated jets with |eta| < 0.8. Results are shown for distributions obtained using the in situ extraction method in data (circles), and labeled jets in the dijet Herwig++ sample (triangles). The error bars represent only statistical uncertainties.

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[Track width vs pt, in situ extraction in data]

Average track width for light-quark- (solid marker) and gluon-induced (open marker) jets as a function of reconstructed jet pT for isolated jets with |eta| < 0.8. Results are shown for distributions obtained using the in situ extraction method in data (circles), and labeled jets in the dijet Herwig++ sample (triangles). The error bars represent only statistical uncertainties.

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[Track multiplicity vs pt, in situ extraction in data, purified samples]

Average track multiplicity for light-quark- (solid marker) and gluon-induced (open marker) jets as a function of reconstructed jet pT for isolated jets with |eta| < 0.8. Results are shown for distributions obtained using the in situ extraction method in data (circles) and samples purified using event-level kinematic cuts. The error bars represent only statistical uncertainties.

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[Track Width vs pt, in situ extraction in data, purified samples]

Average track width for light-quark- (solid marker) and gluon-induced (open marker) jets as a function of reconstructed jet pT for isolated jets with |eta| < 0.8. Results are shown for distributions obtained using the in situ extraction method in data (circles) and samples purified using event-level kinematic cuts. The error bars represent only statistical uncertainties.

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[Separation efficiency]

The efficiency for tagging a quark-like jet vs the rejection for gluon-like jets using a likelihood built from ntrk and track width in Monte Carlo simulation for isolated jets with |eta| < 0.8. The efficiency and rejection are derived using jets labeled with the generator event record. Right, approximate rejections and efficiencies in Pythia MC11 and data for isolated jets with p_T ~ 150 GeV and |eta| < 0.8.

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Major updates:
-- TancrediCarli - 19-Jul-2012

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