Study of energy response and resolution of the ATLAS Tile Calorimeter to hadrons of energies from 16 to 30 GeV

TL;DR

This paper reports on measurements of the energy response and resolution of the ATLAS Tile Calorimeter to hadrons between 16 and 30 GeV, validating simulation predictions with experimental data.

Contribution

It provides the first detailed comparison of the ATLAS Tile Calorimeter's response to hadrons with Geant4 simulations in the 16-30 GeV range.

Findings

Measured response and resolution with few percent uncertainties.

Experimental data agree with Geant4 simulations within uncertainties.

Validates simulation models used for LHC proton-proton event analysis.

Abstract

Three spare modules of the ATLAS Tile Calorimeter were exposed to test beams from the Super Proton Synchrotron accelerator at CERN in 2017. The measurements of the energy response and resolution of the detector to positive pions and kaons and protons with energy in the range 16 to 30 GeV are reported. The results have uncertainties of few percent. They were compared to the predictions of the Geant4-based simulation program used in ATLAS to estimate the response of the detector to proton-proton events at Large Hadron Collider. The determinations obtained using experimental and simulated data agree within the uncertainties.