Observation of a centrality-dependent dijet asymmetry in lead-lead collisions at √s<sub>NN</sub> = 2.76 TeV with the ATLAS Detector at the LHC
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 pernucleon center of mass energy of 2.76 TeV, selected with a minimum bias trigger, jets are reconstr...
| Autores: | ; ; ; ; |
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| Tipo de documento: | Artigo |
| Estado: | Published version |
| Data de publicação: | 2010 |
| País: | Argentina |
| Recursos: | UNLP |
| Repositório: | SEDICI (UNLP) |
| Idioma: | Inglês |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/72549 |
| Acesso em linha: | http://sedici.unlp.edu.ar/handle/10915/72549 |
| Nível de acesso: | Acesso aberto |
| Palavra-chave: | Ciencias Exactas observaciones Física detector ATLAS |
| Resumo: | 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 pernucleon 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. |
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