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Jet energy measurement and its systematic uncertainty in proton-proton collisions at √s=7 TeV with the ATLAS detector

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Jet energy measurement and its systematic uncertainty in proton-proton collisions at √s=7 TeV with the ATLAS detector. / The ATLAS collaboration.
In: European Physical Journal C: Particles and Fields, Vol. 75, 17, 15.01.2015.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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The ATLAS collaboration. Jet energy measurement and its systematic uncertainty in proton-proton collisions at √s=7 TeV with the ATLAS detector. European Physical Journal C: Particles and Fields. 2015 Jan 15;75:17. doi: 10.1140/epjc/s10052-014-3190-y

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The ATLAS collaboration. / Jet energy measurement and its systematic uncertainty in proton-proton collisions at √s=7 TeV with the ATLAS detector. In: European Physical Journal C: Particles and Fields. 2015 ; Vol. 75.

Bibtex

@article{e061e9244257430cba4c4211d0b27213,
title = "Jet energy measurement and its systematic uncertainty in proton-proton collisions at √s=7 TeV with the ATLAS detector",
abstract = "The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector using proton–proton collision data with a centre-ofmass energy of √s = 7 TeV corresponding to an integrated luminosity of 4.7 fb−1. Jets are reconstructed from energy deposits forming topological clusters of calorimeter cells using the anti-kt algorithm with distance parameters R = 0.4 or R = 0.6, and are calibrated using MC simulations. A residual JES correction is applied to account for differences between data and MC simulations. This correction and its systematic uncertainty are estimated using a combination of in situ techniques exploiting the transverse momentum balance between a jet and a reference object such as a photon or a Z boson, for 20 ≤ p jet T < 1000 GeV and pseudorapidities |η| < 4.5. The effect of multiple proton–proton interactions is corrected for, and an uncertainty is evaluated using in situ techniques. The smallest JES uncertainty of less than 1 % is found in the central calorimeter region (|η| < 1.2) for jets with 55 ≤ p jet T < 500 GeV. For central jets at lower pT, the uncertainty is about 3 %. A consistent JES estimate is found using measurements of the calorimeter response of single hadrons in proton–proton collisions and test-beam data, which also provide the estimate for p jet T > 1 TeV. The calibration of forward jets is derived from dijet pT balance measurements. The resulting uncertainty reaches its largest value of 6 % for low-pT jets at |η| = 4.5. Additional JES uncertainties due to specific event topologies, such as close-by jets or selections of event samples with an enhanced content of jets originating from light quarks or gluons, are also discussed. The magnitude of these uncertainties depends on the event sample used in a given physics analysis, but typically amounts to 0.5–3 %",
keywords = "HEAVY-ION COLLISIONS, BARREL CALORIMETER, TRANSVERSE FLOW, CROSS-SECTION, BEAM TESTS, PHOTOPRODUCTION, SIMULATION, HERA, FRAGMENTATION, GENERATORS",
author = "Lee Allison and Adam Barton and Guennadi Borissov and Eva Bouhova-Thacker and James Catmore and Alexandre Chilingarov and William Dearnaley and Harald Fox and Kathryn Grimm and Robert Henderson and Gareth Hughes and Jones, {Roger William Lewis} and Vakhtang Kartvelishvili and Robin Long and Peter Love and Harvey Maddocks and Maria Smizanska and James Walder and {The ATLAS collaboration}",
note = "The final publication is available at Springer via http://dx.doi.org/10.1140/epjc/s10052-014-3190-y Date of Acceptance: 24/11/2014",
year = "2015",
month = jan,
day = "15",
doi = "10.1140/epjc/s10052-014-3190-y",
language = "English",
volume = "75",
journal = "European Physical Journal C: Particles and Fields",
issn = "1434-6044",
publisher = "SPRINGER",

}

RIS

TY - JOUR

T1 - Jet energy measurement and its systematic uncertainty in proton-proton collisions at √s=7 TeV with the ATLAS detector

AU - Allison, Lee

AU - Barton, Adam

AU - Borissov, Guennadi

AU - Bouhova-Thacker, Eva

AU - Catmore, James

AU - Chilingarov, Alexandre

AU - Dearnaley, William

AU - Fox, Harald

AU - Grimm, Kathryn

AU - Henderson, Robert

AU - Hughes, Gareth

AU - Jones, Roger William Lewis

AU - Kartvelishvili, Vakhtang

AU - Long, Robin

AU - Love, Peter

AU - Maddocks, Harvey

AU - Smizanska, Maria

AU - Walder, James

AU - The ATLAS collaboration

N1 - The final publication is available at Springer via http://dx.doi.org/10.1140/epjc/s10052-014-3190-y Date of Acceptance: 24/11/2014

PY - 2015/1/15

Y1 - 2015/1/15

N2 - The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector using proton–proton collision data with a centre-ofmass energy of √s = 7 TeV corresponding to an integrated luminosity of 4.7 fb−1. Jets are reconstructed from energy deposits forming topological clusters of calorimeter cells using the anti-kt algorithm with distance parameters R = 0.4 or R = 0.6, and are calibrated using MC simulations. A residual JES correction is applied to account for differences between data and MC simulations. This correction and its systematic uncertainty are estimated using a combination of in situ techniques exploiting the transverse momentum balance between a jet and a reference object such as a photon or a Z boson, for 20 ≤ p jet T < 1000 GeV and pseudorapidities |η| < 4.5. The effect of multiple proton–proton interactions is corrected for, and an uncertainty is evaluated using in situ techniques. The smallest JES uncertainty of less than 1 % is found in the central calorimeter region (|η| < 1.2) for jets with 55 ≤ p jet T < 500 GeV. For central jets at lower pT, the uncertainty is about 3 %. A consistent JES estimate is found using measurements of the calorimeter response of single hadrons in proton–proton collisions and test-beam data, which also provide the estimate for p jet T > 1 TeV. The calibration of forward jets is derived from dijet pT balance measurements. The resulting uncertainty reaches its largest value of 6 % for low-pT jets at |η| = 4.5. Additional JES uncertainties due to specific event topologies, such as close-by jets or selections of event samples with an enhanced content of jets originating from light quarks or gluons, are also discussed. The magnitude of these uncertainties depends on the event sample used in a given physics analysis, but typically amounts to 0.5–3 %

AB - The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector using proton–proton collision data with a centre-ofmass energy of √s = 7 TeV corresponding to an integrated luminosity of 4.7 fb−1. Jets are reconstructed from energy deposits forming topological clusters of calorimeter cells using the anti-kt algorithm with distance parameters R = 0.4 or R = 0.6, and are calibrated using MC simulations. A residual JES correction is applied to account for differences between data and MC simulations. This correction and its systematic uncertainty are estimated using a combination of in situ techniques exploiting the transverse momentum balance between a jet and a reference object such as a photon or a Z boson, for 20 ≤ p jet T < 1000 GeV and pseudorapidities |η| < 4.5. The effect of multiple proton–proton interactions is corrected for, and an uncertainty is evaluated using in situ techniques. The smallest JES uncertainty of less than 1 % is found in the central calorimeter region (|η| < 1.2) for jets with 55 ≤ p jet T < 500 GeV. For central jets at lower pT, the uncertainty is about 3 %. A consistent JES estimate is found using measurements of the calorimeter response of single hadrons in proton–proton collisions and test-beam data, which also provide the estimate for p jet T > 1 TeV. The calibration of forward jets is derived from dijet pT balance measurements. The resulting uncertainty reaches its largest value of 6 % for low-pT jets at |η| = 4.5. Additional JES uncertainties due to specific event topologies, such as close-by jets or selections of event samples with an enhanced content of jets originating from light quarks or gluons, are also discussed. The magnitude of these uncertainties depends on the event sample used in a given physics analysis, but typically amounts to 0.5–3 %

KW - HEAVY-ION COLLISIONS

KW - BARREL CALORIMETER

KW - TRANSVERSE FLOW

KW - CROSS-SECTION

KW - BEAM TESTS

KW - PHOTOPRODUCTION

KW - SIMULATION

KW - HERA

KW - FRAGMENTATION

KW - GENERATORS

U2 - 10.1140/epjc/s10052-014-3190-y

DO - 10.1140/epjc/s10052-014-3190-y

M3 - Journal article

VL - 75

JO - European Physical Journal C: Particles and Fields

JF - European Physical Journal C: Particles and Fields

SN - 1434-6044

M1 - 17

ER -