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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
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ATLAS Collaboration (Including: Farrington, Sinead, Janus, M., Jeske, C., Jones, G. (Graham), Martin, T. A. and Pianori, E.). (2013) Measurement of the azimuthal angle dependence of inclusive jet yields in Pb+Pb collisions at √sNN=2.76 TeV with the ATLAS detector. Physical Review Letters, Volume 111 (Number 15). p. 152301.
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WRAP_Atlas_PhysRevLett.111.152301.pdf - Published Version Available under License Creative Commons Attribution. Download (641Kb) | Preview |
Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.111.15...
Abstract
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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