Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV

ATLAS, Collaboration; Ancu, Lucian; Battaglia, Andreas; Beck, Hanspeter; Borer, Claudia; Ereditato, Antonio; Fonseca, Maria; Gallo, Valentina; Haug, Sigve; Kabana, Sonja; Kruker, Tobias; Pretzl, Klaus-Peter; Weber, Michael (2013). Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV. European physical journal. C - particles and fields, 73(3), p. 2304. EDP Sciences 10.1140/epjc/s10052-013-2304-2

Preview

Text 2304-2.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (8MB) | 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.

Interest & Impact

Downloads

119 since deposited on 12 May 2014
9 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

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)
  • Jet energy measurement with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV. (deposited 12 May 2014 16:09) [Currently Displayed]

Actions (login required)

Edit item