Jet energy resolution in proton-proton collisions at sqrt(s) = 7 TeV recorded in 2010 with the ATLAS detector

TL;DR

This paper measures the jet energy resolution in proton-proton collisions at 7 TeV using ATLAS data, comparing calibration methods and Monte Carlo simulations, with results showing good agreement within uncertainties.

Contribution

It provides the first detailed in situ measurement of jet energy resolution at 7 TeV with ATLAS, using multiple calibration schemes and validating Monte Carlo models.

Findings

Jet energy resolution measured with two in situ methods.

Uncertainties range from 20% to 10% for jets with pT 30-500 GeV.

Monte Carlo simulation agrees with data within 10%.

Abstract

The measurement of the jet energy resolution is presented using data recorded with the ATLAS detector in proton-proton collisions at sqrt(s) = 7 TeV. The sample corresponds to an integrated luminosity of 35 pb-1. Jets are reconstructed from energy deposits measured by the calorimeters and calibrated using different jet calibration schemes. The jet energy resolution is measured with two different in situ methods which are found to be in agreement within uncertainties. The total uncertainties on these measurements range from 20% to 10% for jets within |y|<2.8 and with transverse momenta increasing from 30 GeV to 500 GeV. Overall, the Monte Carlo simulation of the jet energy resolution agrees with the data within 10%.