Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at sqrt(S(NN))= 2.76 TeV with the ATLAS Detector at the LHC
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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.
Originalsprog | Engelsk |
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Tidsskrift | Physical Review Letters |
Vol/bind | 105 |
Udgave nummer | 25 |
Sider (fra-til) | 252303 |
Antal sider | 18 |
ISSN | 0031-9007 |
DOI | |
Status | Udgivet - 13 dec. 2010 |
ID: 32894661