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Measurement of the Azimuthal Angle Dependence of Inclusive Jet Yields in Pb+Pb Collisions at √sNN=2.76  TeV with the ATLAS Detector

Research output: Contribution to journalJournal article


  • ATLAS Collaboration
Article number152301
<mark>Journal publication date</mark>9/10/2013
<mark>Journal</mark>Physical Review Letters
Issue number15
Number of pages18
<mark>Original language</mark>English


Measurements of the variation of inclusive jet suppression as a function of relative azimuthal angle, Δϕ, with respect to the elliptic event plane provide insight into the path-length dependence of jet quenching. ATLAS has measured the Δϕ dependence of jet yields in 0.14  nb-1 of √sNN=2.76  TeV Pb+Pb collisions at the LHC for jet transverse momenta pT>45  GeV in different collision centrality bins using an underlying event subtraction procedure that accounts for elliptic flow. The variation of the jet yield with Δϕ was characterized by the parameter, v2jet, and the ratio of out-of-plane (Δϕ∼π/2) to in-plane (Δϕ∼0) yields. Nonzero v2jet values were measured in all centrality bins for pT<160  GeV. The jet yields are observed to vary by as much as 20% between in-plane and out-of-plane directions.

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Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
© 2013 CERN, for the ATLAS Collaboration