Butterworth, Jonathan;
ATLAS Collaboration;
(2022)
Measurement of the energy response of the ATLAS calorimeter to charged pions from W±→τ±(→π±ντ)ντ events in Run 2 data.
The European Physical Journal C - Particles and Fields
, 82
, Article 223. 10.1140/epjc/s10052-022-10117-2.
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Abstract
The energy response of the ATLAS calorimeter is measured for single charged pions with transverse momentum in the range 10<pT<300 GeV. The measurement is performed using 139 fb−1 of LHC proton–proton collision data at s√=13 TeV taken in Run 2 by the ATLAS detector. Charged pions originating from τ-lepton decays are used to provide a sample of high-pT isolated particles, where the composition is known, to test an energy regime that has not previously been probed by in situ single-particle measurements. The calorimeter response to single-pions is observed to be overestimated by ∼2% across a large part of the pT spectrum in the central region and underestimated by ∼4% in the endcaps in the ATLAS simulation. The uncertainties in the measurements are ≲1% for 15<pT<185 GeV in the central region. To investigate the source of the discrepancies, the width of the distribution of the ratio of calorimeter energy to track momentum, the energies per layer and response in the hadronic calorimeter are also compared between data and simulation.
| Type: | Article |
|---|---|
| Title: | Measurement of the energy response of the ATLAS calorimeter to charged pions from W±→τ±(→π±ντ)ντ events in Run 2 data |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1140/epjc/s10052-022-10117-2 |
| Publisher version: | https://doi.org/10.1140/epjc/s10052-022-10117-2 |
| Language: | English |
| Additional information: | Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10145711 |
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