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 √(s(NN))=2.76 TeV Pb+Pb collisions at the LHC for jet transverse momenta p(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(2)(jet), and the ratio of out-of-plane (Δφ~π/2) to in-plane (Δφ~0) yields. Nonzero v(2)(jet) values were measured in all centrality bins for p(T)<160 GeV. The jet yields are observed to vary by as much as 20% between in-plane and out-of-plane directions.
Highlights
Measurements of the variation of inclusive jet suppression as a function of relative azimuthal angle, Á, with respect to the elliptic quenching
Pb þ 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
Studies of jet production in Pb þ Pb collisions at the LHC [1,2] show behavior consistent with ‘‘jet quenching,’’ a general term for the modification of parton showers in the hot dense medium created in ultrarelativistic nuclear collisions
Summary
Measurements of the variation of inclusive jet suppression as a function of relative azimuthal angle, Á, with respect to the elliptic quenching. ATLAS has measured event plane provide the Á dependence insight into of jet yields the path-length in 0:14 nbÀ1 of dpeffisffipffiNffieffiNffinffiffi d1⁄4en2c:e76ofTejeVt
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