Observation of a centrality-dependent dijet asymmetry in lead-lead collisions at vsNN=2.76 Tev with the ATLASO detector at the LHC

Aad, G, De Santo, A, Salvatore, F and ATLAS Collaboration, (2010) Observation of a centrality-dependent dijet asymmetry in lead-lead collisions at vsNN=2.76 Tev with the ATLASO detector at the LHC. Physical Review Letters, 105 (25). ISSN 0031-9007

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Abstract

By using the ATLAS detector, observations have been made of a centrality-dependent dijet asymmetry in the collisions of lead ions at the Large Hadron Collider. In a sample of lead-lead events with a per-nucleon center of mass energy of 2.76 TeV, selected with a minimum bias trigger, jets are reconstructed in fine-grained, longitudinally segmented electromagnetic and hadronic calorimeters. The transverse energies of dijets in opposite hemispheres are observed to become systematically more unbalanced with increasing event centrality leading to a large number of events which contain highly asymmetric dijets. This is the first observation of an enhancement of events with such large dijet asymmetries, not observed in proton-proton collisions, which may point to an interpretation in terms of strong jet energy loss in a hot, dense medium.©

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Antonella DeSanto
Date Deposited: 06 Feb 2012 21:24
Last Modified: 08 Mar 2017 05:55
URI: http://sro.sussex.ac.uk/id/eprint/31086

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