Difference: JetEtmissApproved2014LargeRJES (1 vs. 2)

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Large-R (anti-kt R=1.0) JES and JMS for 2012 data

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Revision 12014-08-17 - DavidLopezMateos

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AtlasPublicTopicHeader.png

Large-R (anti-kt R=1.0) JES and JMS for 2012 data

Jet Energy Scale

Summary of the trimmed jet pT scale (JpTS) fractional systematic uncertainties as a function of jet pT. Trimming is implemented (as in arXiv:1306.4945) by re-clustering the jet constituents into subjets of radius R=0.3. The clusters belonging to subjets that carry at least 5% of the original jet pT are kept, and those clusters in subjets with less than 5% of the original jet pT are discarded. These uncertainties are determined from [1] Track/calo jet double ratios using the same prescription as for 2011 (arXiv:1306.4945), which includes a contribution from the tracking efficiency and fake rate. In 2011 the uncertainties were determine as a function of pT and eta; this has been updated such that uncertainties are now calculated as a function of pT, eta and mass/pT; [2] Gamma+jet response in data and [3] Pileup dependence are calculated using the full 2012 dataset with the same prescription as for regular jets with no jet area or offset pileup corrections (as in arXiv:1406.0076); [4] Monte Carlo -based studies of response differences across the different final state topologies resulting from QCD dijet, ttbar and W+jet production. It is known that the pT scale of anti-kt, R = 0.4 jets differs depending on whether the jet was quark- or gluon- initiated [arxiv:1112.6426, arXiv:1406.0076]. By analogy, the jet pT scale may differ between jets originating from quark/gluon and those originating from a W boson or top quark. An internal MC study comparing the jet pT scale for top-, W- and quark/gluon-initiated jets provided by Powheg revealed differences in the pT scale of up to 2-4% dependent on the jet ’flavor’ (or topology) and pT. Repeated studies using the Pythia8, MC@NLO and MadGraph generators support these conclusions.


[eps]

Summary of the trimmed jet pT scale (JpTS) fractional systematic uncertainties as a function of jet pT. Trimming is implemented (as in arXiv:1306.4945) by re-clustering the jet constituents into subjets of radius R=0.3. The clusters belonging to subjets that carry at least 5% of the original jet pT are kept, and those clusters in subjets with less than 5% of the original jet pT are discarded. These uncertainties are determined from [1] Track/calo jet double ratios using the same prescription as for 2011 (arXiv:1306.4945), which includes a contribution from the tracking efficiency and fake rate. In 2011 the uncertainties were determine as a function of pT and eta; this has been updated such that uncertainties are now calculated as a function of pT, eta and mass/pT; [2] Gamma+jet response in data and [3] Pileup dependence are calculated using the full 2012 dataset with the same prescription as for regular jets with no jet area or offset pileup corrections (as in arXiv:1406.0076); [4] Monte Carlo -based studies of response differences across the different final state topologies resulting from QCD dijet, ttbar and W+jet production. It is known that the pT scale of anti-kt, R = 0.4 jets differs depending on whether the jet was quark- or gluon- initiated [arxiv:1112.6426, arXiv:1406.0076]. By analogy, the jet pT scale may differ between jets originating from quark/gluon and those originating from a W boson or top quark. An internal MC study comparing the jet pT scale for top-, W- and quark/gluon-initiated jets provided by Powheg revealed differences in the pT scale of up to 2-4% dependent on the jet ’flavor’ (or topology) and pT. Repeated studies using the Pythia8, MC@NLO and MadGraph generators support these conclusions.


[eps]

Summary of the trimmed jet pT scale (JpTS) fractional systematic uncertainties as a function of jet pT. Trimming is implemented (as in arXiv:1306.4945) by re-clustering the jet constituents into subjets of radius R=0.3. The clusters belonging to subjets that carry at least 5% of the original jet pT are kept, and those clusters in subjets with less than 5% of the original jet pT are discarded. These uncertainties are determined from [1] Track/calo jet double ratios using the same prescription as for 2011 (arXiv:1306.4945), which includes a contribution from the tracking efficiency and fake rate. In 2011 the uncertainties were determine as a function of pT and eta; this has been updated such that uncertainties are now calculated as a function of pT, eta and mass/pT; [2] Gamma+jet response in data and [3] Pileup dependence are calculated using the full 2012 dataset with the same prescription as for regular jets with no jet area or offset pileup corrections (as in arXiv:1406.0076); [4] Monte Carlo -based studies of response differences across the different final state topologies resulting from QCD dijet, ttbar and W+jet production. It is known that the pT scale of anti-kt, R = 0.4 jets differs depending on whether the jet was quark- or gluon- initiated [arxiv:1112.6426, arXiv:1406.0076]. By analogy, the jet pT scale may differ between jets originating from quark/gluon and those originating from a W boson or top quark. An internal MC study comparing the jet pT scale for top-, W- and quark/gluon-initiated jets provided by Powheg revealed differences in the pT scale of up to 2-4% dependent on the jet ’flavor’ (or topology) and pT. Repeated studies using the Pythia8, MC@NLO and MadGraph generators support these conclusions.


[eps]

Summary of the trimmed jet pT scale (JpTS) fractional systematic uncertainties as a function of jet pT. Trimming is implemented (as in arXiv:1306.4945) by re-clustering the jet constituents into subjets of radius R=0.3. The clusters belonging to subjets that carry at least 5% of the original jet pT are kept, and those clusters in subjets with less than 5% of the original jet pT are discarded. These uncertainties are determined from [1] Track/calo jet double ratios using the same prescription as for 2011 (arXiv:1306.4945), which includes a contribution from the tracking efficiency and fake rate. In 2011 the uncertainties were determine as a function of pT and eta; this has been updated such that uncertainties are now calculated as a function of pT, eta and mass/pT; [2] Gamma+jet response in data and [3] Pileup dependence are calculated using the full 2012 dataset with the same prescription as for regular jets with no jet area or offset pileup corrections (as in arXiv:1406.0076); [4] Monte Carlo -based studies of response differences across the different final state topologies resulting from QCD dijet, ttbar and W+jet production. It is known that the pT scale of anti-kt, R = 0.4 jets differs depending on whether the jet was quark- or gluon- initiated [arxiv:1112.6426, arXiv:1406.0076]. By analogy, the jet pT scale may differ between jets originating from quark/gluon and those originating from a W boson or top quark. An internal MC study comparing the jet pT scale for top-, W- and quark/gluon-initiated jets provided by Powheg revealed differences in the pT scale of up to 2-4% dependent on the jet ’flavor’ (or topology) and pT. Repeated studies using the Pythia8, MC@NLO and MadGraph generators support these conclusions.


[eps]

Summary of the trimmed jet pT scale (JpTS) fractional systematic uncertainties as a function of jet pT. Trimming is implemented (as in arXiv:1306.4945) by re-clustering the jet constituents into subjets of radius R=0.3. The clusters belonging to subjets that carry at least 5% of the original jet pT are kept, and those clusters in subjets with less than 5% of the original jet pT are discarded. These uncertainties are determined from [1] Track/calo jet double ratios using the same prescription as for 2011 (arXiv:1306.4945), which includes a contribution from the tracking efficiency and fake rate. In 2011 the uncertainties were determine as a function of pT and eta; this has been updated such that uncertainties are now calculated as a function of pT, eta and mass/pT; [2] Gamma+jet response in data and [3] Pileup dependence are calculated using the full 2012 dataset with the same prescription as for regular jets with no jet area or offset pileup corrections (as in arXiv:1406.0076); [4] Monte Carlo -based studies of response differences across the different final state topologies resulting from QCD dijet, ttbar and W+jet production. It is known that the pT scale of anti-kt, R = 0.4 jets differs depending on whether the jet was quark- or gluon- initiated [arxiv:1112.6426, arXiv:1406.0076]. By analogy, the jet pT scale may differ between jets originating from quark/gluon and those originating from a W boson or top quark. An internal MC study comparing the jet pT scale for top-, W- and quark/gluon-initiated jets provided by Powheg revealed differences in the pT scale of up to 2-4% dependent on the jet ’flavor’ (or topology) and pT. Repeated studies using the Pythia8, MC@NLO and MadGraph generators support these conclusions.


[eps]

Summary of the trimmed jet pT scale (JpTS) fractional systematic uncertainties as a function of jet pT. Trimming is implemented (as in arXiv:1306.4945) by re-clustering the jet constituents into subjets of radius R=0.3. The clusters belonging to subjets that carry at least 5% of the original jet pT are kept, and those clusters in subjets with less than 5% of the original jet pT are discarded. These uncertainties are determined from [1] Track/calo jet double ratios using the same prescription as for 2011 (arXiv:1306.4945), which includes a contribution from the tracking efficiency and fake rate. In 2011 the uncertainties were determine as a function of pT and eta; this has been updated such that uncertainties are now calculated as a function of pT, eta and mass/pT; [2] Gamma+jet response in data and [3] Pileup dependence are calculated using the full 2012 dataset with the same prescription as for regular jets with no jet area or offset pileup corrections (as in arXiv:1406.0076); [4] Monte Carlo -based studies of response differences across the different final state topologies resulting from QCD dijet, ttbar and W+jet production. It is known that the pT scale of anti-kt, R = 0.4 jets differs depending on whether the jet was quark- or gluon- initiated [arxiv:1112.6426, arXiv:1406.0076]. By analogy, the jet pT scale may differ between jets originating from quark/gluon and those originating from a W boson or top quark. An internal MC study comparing the jet pT scale for top-, W- and quark/gluon-initiated jets provided by Powheg revealed differences in the pT scale of up to 2-4% dependent on the jet ’flavor’ (or topology) and pT. Repeated studies using the Pythia8, MC@NLO and MadGraph generators support these conclusions.


[eps]

Jet Mass Scale

Summary of the trimmed jet mass scale (JMS) fractional systematic uncertainties as a function of pjet . T Trimming is implemented (as in arXiv:1306.4945) by re-clustering the jet constituents into subjets of radius R=0.3. The clusters belonging to subjets that carry at least 5% of the original jet pT are kept, and those clusters in subjets with less than 5% of the original jet pT are discarded. These uncertainties are determined from track/calo jet double ratios using the same prescription as for 2011 (arXiv:1306.4945), which includes a contribution from the tracking efficiency and fake rate. In 2011 the uncertainties were determine as a function of pT and eta; this has been updated such that uncertainties are now calculated as a function of pT, eta and mass/pT.
[eps]
Summary of the trimmed jet mass scale (JMS) fractional systematic uncertainties as a function of pjet . T Trimming is implemented (as in arXiv:1306.4945) by re-clustering the jet constituents into subjets of radius R=0.3. The clusters belonging to subjets that carry at least 5% of the original jet pT are kept, and those clusters in subjets with less than 5% of the original jet pT are discarded. These uncertainties are determined from track/calo jet double ratios using the same prescription as for 2011 (arXiv:1306.4945), which includes a contribution from the tracking efficiency and fake rate. In 2011 the uncertainties were determine as a function of pT and eta; this has been updated such that uncertainties are now calculated as a function of pT, eta and mass/pT.
[eps]

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