Setting the jet energy scale for the ZEUS calorimeter
M. Wing (On behalf of the ZEUS collaboration)

TL;DR
This paper presents an improved method for calibrating jet energy measurements in the ZEUS detector, combining tracking, calorimeter data, and simulation to achieve a 1% uncertainty in the jet energy scale.
Contribution
It introduces a dual-method correction procedure for jet energy scale calibration, enhancing accuracy and reliability in ZEUS measurements.
Findings
Achieved a jet energy scale uncertainty of +/- 1%.
Validated correction methods with data and simulation comparisons.
Improved resolution of reconstructed kinematic variables.
Abstract
A much improved determination of the transverse energy of jets has been carried out in ZEUS, using a correction procedure based on two independent methods. The first is based on a combination of tracking and calorimeter information which optimises the resolution of reconstructed kinematic variables. The conservation of energy and momentum in neutral current deep inelastic e^+p scattering events is exploited to determine the energy corrections by balancing the kinematic quantities of the scattered positron with those of the hadronic final state. The method has been independently applied to data and simulated events. The second method uses calorimeter cells as inputs to the jet algorithm. Simulated events are then used to provide a correction for the energy loss due to inactive material in front of the calorimeter. A detailed comparison of the jet transverse energy and the transverse…
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