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Measurement of the energy response of the ATLAS calorimeter to charged pions from W±→τ±(→π±ντ)ντ events in Run 2 data

The energy response of the ATLAS calorimeter is measured for single charged pions with transverse momentum in the range $$10<p_\text {T}<300$$ GeV. The measurement is performed using 139 $$\text {fb}^{-1}$$of LHC proton-proton collision data at $$\sqrt{s}=13$$ TeV taken in Run 2 by the ATLAS d...

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Main Authors: Aad, Georges (Author) , Bartels, Falk (Author) , Castillo, Florencia Luciana (Author) , Czurylo, Marta (Author) , Dittmeier, Sebastian (Author) , Dunford, Monica (Author) , Franchino, Silvia (Author) , Klassen, Martin (Author) , Krishnan, Anjali (Author) , Mkrtchyan, Tigran (Author) , Napolitano, Fabrizio (Author) , Ott, Philipp (Author) , Rassloff, Damir Fabrice (Author) , Rodriguez Bosca, Sergi (Author) , Sauer, Christof (Author) , Schöning, André (Author) , Schultz-Coulon, Hans-Christian (Author) , Spieker, Thomas (Author) , Stamen, Rainer (Author) , Starovoitov, Pavel (Author) , Vigani, Luigi (Author) , Weber, Sebastian (Author) , Wessels, Martin (Author) , Yue, Xiaoguang (Author) , Zinßer, Joachim (Author)
Corporate Author: ATLAS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 14 March 2022
In: The European physical journal. C, Particles and fields
Year: 2022, Volume: 82, Issue: 3, Pages: 1-31
ISSN:1434-6052
DOI:10.1140/epjc/s10052-022-10117-2
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-022-10117-2
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Author Notes:ATLAS Collaboration
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Summary:The energy response of the ATLAS calorimeter is measured for single charged pions with transverse momentum in the range $$10<p_\text {T}<300$$ GeV. The measurement is performed using 139 $$\text {fb}^{-1}$$of LHC proton-proton collision data at $$\sqrt{s}=13$$ TeV taken in Run 2 by the ATLAS detector. Charged pions originating from $$\tau $$-lepton decays are used to provide a sample of high-$$p_{\text {T}}$$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 $${\sim }2\%$$across a large part of the $$p_{\text {T}}$$spectrum in the central region and underestimated by $${\sim }4\%$$in the endcaps in the ATLAS simulation. The uncertainties in the measurements are $${\lesssim }1\%$$for $$15<p_\text {T}<185$$ 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.
Item Description:Gesehen am 22.06.2022
ATLAS Collaboration: G. Aad, F. Bartels, F.L. Castillo, M.M. Czurylo, S.J. Dittmeier, M. Dunford, S. Franchino, M. Klassen, A. Krishnan, T. Mkrtchyan, F. Napolitano, P.S. Ott, D.F. Rassloff, S. Rodriguez Bosca, C. Sauer, A. Schöning, H-C. Schultz-Coulon, T.M. Spieker, R. Stamen, P. Starovoitov, L. Vigani, S. Weber, M. Wessels, X. Yue, J. Zinsser [und viele weitere]
Im Titel ist das Plusminus-Zeichen hochgestellt, "tau" nach "nu" ist tiefgestellt
Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-022-10117-2

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