ATLAS presents the first JES and JER measurements for anti-k_t R=0.2 and R=0.6 jets at 13 TeV, using a new direct-matching in situ calibration against R=0.4 jets.
Single hadron response measurement and calorimeter jet energy scale uncertainty with the ATLAS detector at the LHC
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abstract
The uncertainty on the calorimeter energy response to jets of particles is derived for the ATLAS experiment at the Large Hadron Collider (LHC). First, the calorimeter response to single isolated charged hadrons is measured and compared to the Monte Carlo simulation using proton-proton collisions at centre-of-mass energies of sqrt(s) = 900 GeV and 7 TeV collected during 2009 and 2010. Then, using the decay of K_s and Lambda particles, the calorimeter response to specific types of particles (positively and negatively charged pions, protons, and anti-protons) is measured and compared to the Monte Carlo predictions. Finally, the jet energy scale uncertainty is determined by propagating the response uncertainty for single charged and neutral particles to jets. The response uncertainty is 2-5% for central isolated hadrons and 1-3% for the final calorimeter jet energy scale.
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Energy scale and resolution for anti-$k_t$ jets with radius parameters $R=0.2$ and 0.6 measured in proton-proton collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
ATLAS presents the first JES and JER measurements for anti-k_t R=0.2 and R=0.6 jets at 13 TeV, using a new direct-matching in situ calibration against R=0.4 jets.