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

Aad, G.; Abbott, B.; Abdallah, J.; Chudoba, Jiří; Gallus, Petr; Gunther, Jaroslav; Havránek, Miroslav; Hruška, I.; Juránek, Vojtěch; Kepka, Oldřich; Kupčo, Alexander; Kůs, Vlastimil; Kvasnička, Jiří; Lipinský, L.; Lokajíček, Miloš; Marčišovský, Michal; Mikeštíková, Marcela; Myška, Miroslav; Němeček, Stanislav; Panušková, M.; Růžička, Pavel; Schovancová, Jaroslava; Šícho, Petr; Staroba, Pavel; Taševský, Marek; Tic, Tomáš; Valenta, J.; Vrba, Václav

doi:https://dx.doi.org/10.1103/PhysRevLett.105.252303

Number of the records: 1

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

1.

SYSNO ASEP	0369949
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	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
Author(s)	Aad, G. (FR) Abbott, B. (US) Abdallah, J. (ES) Chudoba, Jiří (FZU-D)_{RID, ORCID} Gallus, Petr (FZU-D)_RID Gunther, Jaroslav (FZU-D) Havránek, Miroslav (FZU-D)_RID Hruška, I. (CZ) Juránek, Vojtěch (FZU-D) Kepka, Oldřich (FZU-D)_{RID, ORCID} Kupčo, Alexander (FZU-D)_{RID, ORCID} Kůs, Vlastimil (FZU-D)_RID Kvasnička, Jiří (FZU-D)_{RID, ORCID} Lipinský, L. (CZ) Lokajíček, Miloš (FZU-D)_{RID, ORCID} Marčišovský, Michal (FZU-D)_{RID, ORCID} Mikeštíková, Marcela (FZU-D)_{RID, ORCID} Myška, Miroslav (FZU-D) Němeček, Stanislav (FZU-D)_{RID, ORCID} Panušková, M. (CZ) Růžička, Pavel (FZU-D) Schovancová, Jaroslava (FZU-D) Šícho, Petr (FZU-D)_{RID, ORCID} Staroba, Pavel (FZU-D)_{RID, ORCID} Taševský, Marek (FZU-D)_{RID, ORCID} Tic, Tomáš (FZU-D) Valenta, J. (CZ) Vrba, Václav (FZU-D)_{RID, ORCID}
Source Title	Physical Review Letters. - : American Physical Society - ISSN 0031-9007 Roč. 105, č. 25 (2010), "252303-1"-"252303-5"
Number of pages	5 s.
Language	eng - English
Country	US - United States
Keywords	jet: pair production ; jet: transverse energy ; jet: energy loss ; calorimeter:hadronic ; jet: angular distribution ; ATLAS ; underlying event
Subject RIV	BF - Elementary Particles and High Energy Physics
R&D Projects	LC527 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LA08032 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LA08015 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z10100502 - FZU-D (2005-2011)
UT WOS	000286750400009
DOI	10.1103/PhysRevLett.105.252303
Annotation	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 underlying event is measured and subtracted event-by-event, giving estimates of jet transverse energy above the ambient background. The transverse energies of dijets in opposite hemispheres is 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, and which may point to an interpretation in terms of strong jet energy loss in a hot, dense medium.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2012

Number of the records: 1