ATLAS Collaboration, including; Ancu, Lucian; Battaglia, Andreas; Beck, Hanspeter; Borer, Claudia; Ereditato, Antonio; Fonseca Martin, Teresa; Gallo, Valentina; Haug, Sigve; Kabana, Sonja; Kruker, Tobias; Pretzl, Klaus; Weber, Michael (2011). Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV
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1112.6426v1.pdf Available under License BORIS Standard License. Download (3MB) | Preview |
The jet energy scale (JES) and its systematic uncertainty are determined for jets measured with the ATLAS detector at the LHC in proton-proton collision data at a centre-of-mass energy of sqrt(s) = 7 TeV corresponding to an integrated luminosity of 38 inverse pb. Jets are reconstructed with the anti-kt algorithm with distance parameters R=0.4 or R=0.6. Jet energy and angle corrections are determined from Monte Carlo simulations to calibrate jets with transverse momenta pt > 20 GeV and pseudorapidities eta<4.5. The JES systematic uncertainty is estimated using the single isolated hadron response measured in situ and in test-beams. The JES uncertainty is less than 2.5% in the central calorimeter region (eta<0.8) for jets with 60 < pt < 800 GeV, and is maximally 14% for pt < 30 GeV in the most forward region 3.2<eta<4.5. The uncertainty for additional energy from multiple proton-proton collisions in the same bunch crossing is less than 1.5% per additional collision for jets with pt > 50 GeV after a dedicated correction for this effect. The JES is validated for jet transverse momenta up to 1 TeV to the level of a few percent using several in situ techniques by comparing a well-known reference such as the recoiling photon pt, the sum of the transverse momenta of tracks associated to the jet, or a system of low-pt jets recoiling against a high-pt jet. More sophisticated jet calibration schemes are presented based on calorimeter cell energy density weighting or hadronic properties of jets, providing an improved jet energy resolution and a reduced flavour dependence of the jet response. The JES systematic uncertainty determined from a combination of in situ techniques are consistent with the one derived from single hadron response measurements over a wide kinematic range. The nominal corrections and uncertainties are derived for isolated jets in an inclusive sample of high-pt jets.
Item Type: |
Working Paper |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP) |
UniBE Contributor: |
Ancu, Lucian, Battaglia, Andreas, Beck, Hans Peter, Borer, Claudia, Ereditato, Antonio, Gallo, Valentina, Haug, Sigve, Kruker, Tobias, Weber, Michele |
Subjects: |
500 Science > 530 Physics |
Language: |
English |
Submitter: |
Factscience Import |
Date Deposited: |
04 Oct 2013 14:28 |
Last Modified: |
05 Dec 2022 14:08 |
ArXiv ID: |
1112.6426 |
BORIS DOI: |
10.7892/boris.10398 |
URI: |
https://boris.unibe.ch/id/eprint/10398 (FactScience: 216282) |
Available Versions of this Item
- Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV. (deposited 04 Oct 2013 14:28) [Currently Displayed]
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