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Energy scale and resolution for anti-kt jets with radius parameters R = 0.2 and 0.6 measured in proton-proton collisions at √s = 13 TeV with the ATLAS detector

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Jets with different radius parameters R are an important tool for probing quantum chromodynamics processes at different angular scales. Jets with small $$R=0.2$$are instrumental in measurements of the substructure of large-R jets resulting from collimated hadronic decays of energetic W, Z, and Hig...

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Hauptverfasser: Aad, Georges (Verfasst von) , Ackermann, Anke (Verfasst von) , Backes, Mathias (Verfasst von) , Baltes, Lisa Marie (Verfasst von) , Bartels, Falk (Verfasst von) , Dittmeier, Sebastian (Verfasst von) , Dunford, Monica (Verfasst von) , Franchino, Silvia (Verfasst von) , Junkermann, Thomas (Verfasst von) , Mkrtchyan, Tigran (Verfasst von) , Rassloff, Damir Fabrice (Verfasst von) , Sanfilippo, Lorenzo (Verfasst von) , Schöning, André (Verfasst von) , Schultz-Coulon, Hans-Christian (Verfasst von) , Sothilingam, Varsiha (Verfasst von) , Stamen, Rainer (Verfasst von) , Vigani, Luigi (Verfasst von) , Wessels, Martin (Verfasst von) , Zinßer, Joachim (Verfasst von)
Körperschaft: ATLAS Collaboration (Verfasst von)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 22 July 2025
In: The European physical journal. C, Particles and fields
Year: 2025, Jahrgang: 85, Heft: 7, Pages: 1-46
ISSN:1434-6052
DOI:10.1140/epjc/s10052-025-14226-6
Online-Zugang:Verlag, kostenfrei, Volltext: https://doi.org/10.1140/epjc/s10052-025-14226-6
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Verfasserangaben:ATLAS Collaboration*
Beschreibung
Zusammenfassung:Jets with different radius parameters R are an important tool for probing quantum chromodynamics processes at different angular scales. Jets with small $$R=0.2$$are instrumental in measurements of the substructure of large-R jets resulting from collimated hadronic decays of energetic W, Z, and Higgs bosons, top quarks, and of potential new resonances. This paper presents measurements of the energy scale, resolution, and associated uncertainties of jets with radius parameters $$R=0.2$$and 0.6, obtained using the ATLAS detector. The results are based on $$37~\text {fb}^{-1}$$of proton-proton collision data from the Large Hadron Collider at a centre-of-mass energy of $$\sqrt{s}=13$$ TeV. A new in situ method for measuring jet energy scale differences between data and Monte Carlo simulations is presented. The systematic uncertainties in the jet energy scale for central jets $$(|\eta | < 1.2)$$typically vary from 1% to about 5% as a function of $$|\eta |$$at very low transverse momentum, $$p_{\text {T}},$$of around 20 GeV for both $$R=0.2$$and 0.6 jets. The relative energy resolution ranges from $$(35 \pm 6)\%$$at $$p_{\text {T}} = 20$$ GeV to $$(6 \pm 0.5)\%$$at $$p_{\text {T}} = 300$$ GeV for central $$R=0.2$$jets, and is found to be slightly worse for $$R=0.6$$jets. Finally, the effect of close-by hadronic activity on the jet energy scale is investigated and is found to be well modelled by the ATLAS Monte Carlo simulations.
Beschreibung:Veröffentlicht: 22. Juli 2025
Im Titel ist der Buchstabe "t" tiefgestellt
*ATLAS Collaboration: G. Aad, A. Ackermann, M.J. Backes, L.M. Baltes, F. Bartels, S.J. Dittmeier, M. Dunford, S. Franchino, T. Junkermann, T. Mkrtchyan, D.F. Rassloff, L. Sanfilippo, A. Schoening, H.-C. Schultz-Coulon, V. Sothilingam, R. Stamen, L. Vigani, M. Wessels, J. Zinsser [und sehr viele weitere Personen]
Gesehen am 22.04.2026
Beschreibung:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-025-14226-6

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