Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at root s(NN)=2.76 TeV with the ATLAS Detector at the LHC
- NázevTitle
- Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at root s(NN)=2.76 TeV with the ATLAS Detector at the LHCObservation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at root s(NN)=2.76 TeV with the ATLAS Detector at the LHC
- Druh výsledkuResult type
- Článek v časopiseJournal article
- AutořiAuthors
- G. Aad, B. Abbott, J. Abdallah, A. A. Abdelalim, A. Abdesselam, T. Holý, J. Jakůbek, V. Král, F. Krejčí, S. Pospíšil, T. Slavíček, K. Smolek, M. Solar, J. Šolc, V. Sopko, I. Štekl, D. Tureček, K. Augsten, T. Horažďovský, Z. Hubáček, Z. Kohout, V. Šimák, J. Sodomka, B. Sopko, V. Vacek, M. Vlasák, P. Vokáč
- Klíčová slovaKeywords
- atlas, lhc, Collision, detector, dijet asymmetry
- ExperimentCollaboration
- ATLAS
- DOIDOI
- 10.1103/PhysRevLett.105.252303
- Časopis / citaceJournal / citation
- Physical Review Letters 105(25), 252303 (2010) · ISSN 0031-9007
- RokYear
- 2010
- JazykLanguage
- eng
- ZáznamyRecords
- ProjektProject
- Fundamentální experimenty ve fyzice mikrosvětaFundamental Experiments in Physics of Microworld; Mezinárodní experiment ATLAS-CERNInternational Experiment ATLAS-CERN
- CitovánoCited by
- 1071 (INSPIRE-HEP)
- Plný text (open access)Full text (open access)
- http://link.aps.org/pdf/10.1103/PhysRevLett.105.252303
- Citace ke staženíDownload citation
- TXT · BibTeX
AbstraktAbstract
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.
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.