Determination of jet calibration and energy resolution in proton-proton collisions at \sqrts = 8 TeV using the ATLAS detector

Haug, Sigve; Weber, Michele; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio; Merlassino, Claudia; Miucci, Antonio; Weston, Thomas Daniel (2020). Determination of jet calibration and energy resolution in proton-proton collisions at \sqrts = 8 TeV using the ATLAS detector. European physical journal. C - particles and fields, 80(12) EDP Sciences 10.1140/epjc/s10052-020-08477-8

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The jet energy scale, jet energy resolution, and their systematic uncertainties are measured for jets reconstructed with the ATLAS detector in 2012 using proton–proton data produced at a centre-of-mass energy of 8 TeV with an integrated luminosity of 20fb−1. Jets are reconstructed from clusters of energy depositions in the ATLAS calorimeters using the anti-kt algorithm. A jet calibration scheme is applied in multiple steps, each addressing specific effects including mitigation of contributions from additional proton–proton collisions, loss of energy in dead material, calorimeter non-compensation, angular biases and other global jet effects. The final calibration step uses several in situ techniques and corrects for residual effects not captured by the initial calibration. These analyses measure both the jet energy scale and resolution by exploiting the transverse momentum balance in γ + jet, Z + jet, dijet, and multijet events. A statistical combination of these measurements is performed. In the central detector region, the derived calibration has a precision better than 1% for jets with transverse momentum 150GeV<pT< 1500 GeV, and the relative energy resolution is (8.4±0.6)% for pT=100GeV and (23±2)% for pT=20GeV. The calibration scheme for jets with radius parameter R=1.0, for which jets receive a dedicated calibration of the jet mass, is also discussed.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)
08 Faculty of Science > Physics Institute

UniBE Contributor:

Haug, Sigve; Weber, Michele; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio; Merlassino, Claudia; Miucci, Antonio and Weston, Thomas Daniel

Subjects:

500 Science > 530 Physics

ISSN:

1434-6044

Publisher:

EDP Sciences

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

31 May 2021 17:41

Last Modified:

06 Jun 2021 03:15

Publisher DOI:

10.1140/epjc/s10052-020-08477-8

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt

BORIS DOI:

10.48350/155601

URI:

https://boris.unibe.ch/id/eprint/155601

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