Measurement of Jet pT correlations in Pb+Pb and pp collisions at √sNN = 2.76 TeV with the ATLAS detector

dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorMeirose, Bernharden_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorAaboud, M.en_US
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdallah, J.en_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAbeloos, B.en_US
dc.contributor.authorAbidi, S. H.en_US
dc.contributor.authorATLAS Collaborationen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorMeirose, Bernharden_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.description.abstractMeasurements of dijet pT correlations in Pb+Pb and pp collisions at a nucleon–nucleon centre-of-mass energy of √sNN= 2.76 TeV are presented. The measurements are performed with the ATLAS detector at the Large Hadron Collider using Pb+Pb and pp data samples corresponding to integrated luminosities of 0.14 nb−1 and 4.0 pb−1, respectively. Jets are reconstructed using the anti-kt algorithm with radius parameter values R = 0.3 and R = 0.4. A background subtraction procedure is applied to correct the jets for the large underlying event present in Pb+Pb collisions. The leading and sub-leading jet transverse momenta are denoted pT1 and pT2. An unfolding procedure is applied to the two-dimensional (pT1, pT2) distributions to account for experimental effects in the measurement of both jets. Distributions of (1/N)dN/dxJ, where xJ= pT2/pT1, are presented as a function of pT1 and collision centrality. The distributions are found to be similar in peripheral Pb+Pb collisions and pp collisions, but highly modified in central Pb+Pb collisions. Similar features are present in both the R =0.3 and R = 0.4 results, indicating that the effects of the underlying event are properly accounted for in the measurement. The results are qualitatively consistent with expectations from partonic energy loss models. © 2017 The Author. Published by Elsevier B.V.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.identifier.bibliographicCitationAaboud, M., G. Aad, B. Abbott, J. Abdallah, et al. 2017. "Measurement of jet pT correlations in Pb+Pb and pp collisions at √sNN = 2.76 TeV with the ATLAS detector." Physics Letters B 774, doi:10.1016/j.physletb.2017.09.078en_US
dc.publisherElsevier Science B.V.en_US
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2017 CERN, for the ATLAS Collaborationen_US
dc.sourcePhysics Letters B
dc.subjectTransverse momentumen_US
dc.subjectLead-lead interactionsen_US
dc.subjectProton-proton interactionsen_US
dc.subjectJets (Nuclear physics)en_US
dc.titleMeasurement of Jet pT correlations in Pb+Pb and pp collisions at √sNN = 2.76 TeV with the ATLAS detectoren_US


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