Observation and studies of jet quenching in PbPb collisions at nucleon-nucleon center-of-mass energy = 2.76 TeV

By Cms Collaboration. 2011

296 citations recorded by the source corpus.

Jet production in PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV was studied with the CMS detector at the LHC, using a data sample corresponding to an integrated luminosity of 6.7 μb−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 cut-off 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. Submitted to Physical Review C ∗See Appendix A for the list of collaboration members ar X iv :1 10 2. 19 57 v2 [ nu cl -e x] 1 0 Fe b 20 11

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/5c97e24e35c667eeb0320c9ca65ff5cdce647da0

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In Nuclear and High Energy Physics

Citations in the corpus

A perturbative framework for jet quenching (2012, background): “In particular, measurements of the di-jet asymmetry [19, 20] and the inclusive jet suppression [21, 22] indicate that the interaction of parton showers with the surrounding QCD medium can dissipate a significant fraction of its total transverse energy to large angles, outside typical jet cones 1.”
Measurement of jet suppression in central Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV (2015, methodology): “The existence of the QGP is supported by the observations reported by experiments at the Relativistic Heavy Ion Collider (RHIC) [2–5] and at the Large Hadron Collider (LHC) [6–17].”
Jet quenching in high-energy heavy-ion collisions (2015, methodology): “This result is qualitatively consistent with CMS measurements of dijet momentum imbalance and the redistribution of lost energy.(12)”
Interference effects in medium-induced gluon radiation (2011, background): “However, while such bosons are copiously produced in Pb+Pb collisions at the LHC, their identification via hadronic decays is complicated, if at all possible, by the large QCD background12.”
A hybrid strong/weak coupling approach to jet quenching (2014, methodology): “6 Since CMS uses different centrality bins for its 〈AJ〉 and RAA measurements, we combined the experimental values of RAA from CMS’ 0 − 5% and 5 − 10% centrality bins, and their measurements of 〈AJ〉 – 25 –”