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

ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL

PHYSICAL REVIEW LETTERS

AMER PHYSICAL SOC

Lugar: New York; Año: 2013 vol. 231 p. 1 - 23

0031-9007

Measurements of the variation of inclusive jet suppression as a function of relative azimuthalangle, ∆φ, with respect to the elliptic event plane provide insight into the path-length dependence of√jet quenching. ATLAS has measured the ∆φ dependence of jet yields in 0.14 nb−1 of sNN = 2.76 TeVPb+Pb collisions at the LHC for jet transverse momenta pT > 45 GeV in different collision centralitybins using an underlying event subtraction procedure that accounts for elliptic flow. The variation ofjetthe jet yield with ∆φ was characterized by the parameter, v2 , and the ratio of out-of-plane (∆φ ∼ π/2)jetto in-plane (∆φ ∼ 0) yields. Non-zero v2 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.