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Quark vs Gluon Jet Tagging at ATLAS
Distinguishing quark-initiated from gluon-initiated jets is useful for many measurements and searches at the LHC. We present a quark-initiated versus gluon-initiated jet tagger from the ATLAS experiment using the number of reconstructed charged particles inside the jet. The measurement of the charge...
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Lenguaje: | eng |
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2017
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Acceso en línea: | http://cds.cern.ch/record/2275502 |
_version_ | 1780955138210398208 |
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author | Rubbo, Francesco |
author_facet | Rubbo, Francesco |
author_sort | Rubbo, Francesco |
collection | CERN |
description | Distinguishing quark-initiated from gluon-initiated jets is useful for many measurements and searches at the LHC. We present a quark-initiated versus gluon-initiated jet tagger from the ATLAS experiment using the number of reconstructed charged particles inside the jet. The measurement of the charged-particle multiplicity inside jets from Run 1 is used to derive uncertainties on the tagger performance for Run 2. With an efficiency of 60% to select quark-initiated jets, the efficiency to select gluon-initiated jets is between 10 and 20% across a wide range in jet pT up to 1.5 TeV with about an absolute 5% systematic uncertainty on the efficiencies. In addition, we also present preliminary studies on a tagger for the ATLAS experiment using the full radiation pattern inside a jet processed as images in deep neural network classifiers. |
id | cern-2275502 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2017 |
record_format | invenio |
spelling | cern-22755022019-09-30T06:29:59Zhttp://cds.cern.ch/record/2275502engRubbo, FrancescoQuark vs Gluon Jet Tagging at ATLASParticle Physics - ExperimentDistinguishing quark-initiated from gluon-initiated jets is useful for many measurements and searches at the LHC. We present a quark-initiated versus gluon-initiated jet tagger from the ATLAS experiment using the number of reconstructed charged particles inside the jet. The measurement of the charged-particle multiplicity inside jets from Run 1 is used to derive uncertainties on the tagger performance for Run 2. With an efficiency of 60% to select quark-initiated jets, the efficiency to select gluon-initiated jets is between 10 and 20% across a wide range in jet pT up to 1.5 TeV with about an absolute 5% systematic uncertainty on the efficiencies. In addition, we also present preliminary studies on a tagger for the ATLAS experiment using the full radiation pattern inside a jet processed as images in deep neural network classifiers.ATL-PHYS-SLIDE-2017-574oai:cds.cern.ch:22755022017-07-23 |
spellingShingle | Particle Physics - Experiment Rubbo, Francesco Quark vs Gluon Jet Tagging at ATLAS |
title | Quark vs Gluon Jet Tagging at ATLAS |
title_full | Quark vs Gluon Jet Tagging at ATLAS |
title_fullStr | Quark vs Gluon Jet Tagging at ATLAS |
title_full_unstemmed | Quark vs Gluon Jet Tagging at ATLAS |
title_short | Quark vs Gluon Jet Tagging at ATLAS |
title_sort | quark vs gluon jet tagging at atlas |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2275502 |
work_keys_str_mv | AT rubbofrancesco quarkvsgluonjettaggingatatlas |