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

Understand

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.