Measurement of the Azimuthal Angle Dependence of Inclusive Jet Yields in Pb + Pb Collisions at √s[subscript NN] = 2.76 TeV with the ATLAS Detector
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[superscript −1] of √s[su...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/84925 https://orcid.org/0000-0002-7586-7253 |
| Summary: | 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[superscript −1] of √s[subscript NN] = 2.76 TeV Pb + Pb collisions at the LHC for jet transverse momenta p[subscript T] > 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, v[jet over 2], and the ratio of out-of-plane (Δϕ ~ π/2) to in-plane (Δϕ ~ 0) yields. Nonzero v[jet over 2] values were measured in all centrality bins for p[subscript T] < 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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