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Measurement of Suppression of Large-Radius Jets and Its Dependence on Substructure in Pb + Pb Collisions at √sNN = 5.02 TeV with the ATLAS Detector

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dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbeling, K.
dc.contributor.authorAbidi, S.H.
dc.contributor.authorAboulhorma, A.
dc.contributor.authorAbramowicz, H.
dc.contributor.authorAbreu, H.
dc.contributor.authorAbulaiti, Y.
dc.contributor.authorAbusleme Hoffman, A.C.
dc.contributor.authorAcharya, B.S.
dc.contributor.authorAdam Bourdarios, C.
dc.contributor.authorAdamczyk, L.
dc.contributor.authorAdamek, L.
dc.contributor.authorAddepalli, S.V.
dc.contributor.authorAdelman, J.
dc.contributor.authorAdiguzel, A.
dc.contributor.authorAdorni, S.
dc.contributor.authorAdye, T.
dc.contributor.authorAffolder, A.A.
dc.contributor.authorAfik, Y.
dc.contributor.authoret al.
dc.date.issued2023
dc.description.abstractThis letter presents a measurement of the nuclear modification factor of large-radius jets in √sNN = 5.02 TeV Pb + Pb collisions by the ATLAS experiment. The measurement is performed using 1.72 nb¯¹ and 257 pb‾¹ of Pb + Pb and pp data, respectively. The large-radius jets are reconstructed with the anti-kt algorithm using a radius parameter of R ¼ 1.0, by reclustering anti-k(t) R = 0.2 jets, and are measured over the transverse momentum (pT) kinematic range of 158 < pT < 1000 GeV and absolute pseudorapidity |y| < 2.0. The large-radius jet constituents are further reclustered using the k(t) algorithm in order to obtain the splitting parameters, √d₁₂ and ΔR₁₂, which characterize the transverse momentum scale and angular separation for the hardest splitting in the jet, respectively. The nuclear modification factor, R(AA), obtained by comparing the Pb + Pb jet yields to those in pp collisions, is measured as a function of jet transverse momentum (pT ) and √d₁₂ or ΔR₁₂. A significant difference in the quenching of large-radius jets having single subjet and those with more complex substructure is observed. Systematic comparison of jet suppression in terms of R(AA) for different jet definitions is also provided. Presented results support the hypothesis that jets with hard internal splittings lose more energy through quenching and provide a new perspective for understanding the role of jet structure in jet suppression.
dc.identifier.citationPhysical Review Letters, 2023; 131(17):172301-1-172301-22
dc.identifier.doi10.1103/physrevlett.131.172301
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.orcidFilmer, E.K. [0000-0001-6967-7325]
dc.identifier.orcidJackson, P. [0000-0002-0847-402X]
dc.identifier.orcidKong, A.X.Y. [0000-0001-8063-8765]
dc.identifier.orcidMcDougall, A.E. [0000-0001-7713-2800]
dc.identifier.orcidOliver, J.L. [0000-0002-0713-6627]
dc.identifier.orcidPotti, H. [0000-0002-0800-9902]
dc.identifier.orcidRuggeri, T.A. [0000-0001-9941-1966]
dc.identifier.orcidTing, E.X.L. [0000-0002-5886-6339]
dc.identifier.orcidWhite, M.J. [0000-0001-5474-4580]
dc.identifier.urihttps://hdl.handle.net/2440/142675
dc.language.isoen
dc.publisherAmerican Physical Society (APS)
dc.relation.grantARC
dc.rights© 2023 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
dc.source.urihttps://doi.org/10.1103/physrevlett.131.172301
dc.subjectlarge-radius jets; ATLAS
dc.titleMeasurement of Suppression of Large-Radius Jets and Its Dependence on Substructure in Pb + Pb Collisions at √sNN = 5.02 TeV with the ATLAS Detector
dc.title.alternativeMeasurement of Suppression of Large-Radius Jets and Its Dependence on Substructure in Pb + Pb Collisions at root sNN = 5.02 TeV with the ATLAS Detector
dc.typeJournal article
pubs.publication-statusPublished

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