par Chatrchyan, Serguei;Clerbaux, Barbara 
;De Lentdecker, Gilles ;Gay, Arnaud ;Hreus, Tomas ;Marage, Pierre ;Thomas, Laurent ;Vander Velde, Catherine ;Vanlaer, Pascal ;Dero, Vincent ;Charaf, Othman ;Hammad, Grégory ; [et al.]
Référence Physical review. C. Nuclear physics, 84, 2, 024906
Publication Publié, 2011
;De Lentdecker, Gilles ;Gay, Arnaud ;Hreus, Tomas ;Marage, Pierre ;Thomas, Laurent ;Vander Velde, Catherine ;Vanlaer, Pascal ;Dero, Vincent ;Charaf, Othman ;Hammad, Grégory ; [et al.]Référence Physical review. C. Nuclear physics, 84, 2, 024906
Publication Publié, 2011
Article révisé par les pairs
| Résumé : | Jet production in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV was studied with the Compact Muon Solenoid (CMS) detector at the LHC, using a data sample corresponding to an integrated luminosity of 6.7μb-1. Jets are reconstructed using the energy deposited in the CMS calorimeters and studied as a function of collision centrality. With increasing collision centrality, a striking imbalance in dijet transverse momentum is observed, consistent with jet quenching. The observed effect extends from the lower cutoff used in this study (jet pT=120 GeV/c) up to the statistical limit of the available data sample (jet pT≈210 GeV/c). Correlations of charged particle tracks with jets indicate that the momentum imbalance is accompanied by a softening of the fragmentation pattern of the second most energetic, away-side jet. The dijet momentum balance is recovered when integrating low transverse momentum particles distributed over a wide angular range relative to the direction of the away-side jet. |
