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dc.contributor.authorAdare, Andrew Marshall
dc.contributor.authorAfanasiev, Sergey V.
dc.contributor.authorAidala, Christine A.
dc.contributor.authorAjitanand, N. N.
dc.contributor.authorAkiba, Yasuyuki
dc.contributor.authorBaksay, Gyöngyi
dc.contributor.authorBaksay, László A.
dc.contributor.authorDehmelt, Klaus
dc.contributor.authorHohlmann, Marcus
dc.contributor.authorRembeczki, S.
dc.date.accessioned2017-06-13T14:26:31Z
dc.date.available2017-06-13T14:26:31Z
dc.date.issued2008-07-08
dc.identifier.citationAdare, A., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Al-Bataineh, H., . . . Zolin, L. (2008). Dihadron azimuthal correlations in Au+Au collisions at sNN=200 GeV. Physical Review C - Nuclear Physics, 78(1) doi:10.1103/PhysRevC.78.014901en_US
dc.identifier.urihttp://hdl.handle.net/11141/1528
dc.description.abstractAzimuthal angle (Δϕ) correlations are presented for a broad range of transverse momentum (0.4<pT<10 GeV/c) and centrality (0-92%) selections for charged hadrons from dijets in Au+Au collisions at √sNN=200 GeV. With increasing pT, the away-side Δϕ distribution evolves from a broad and relatively flat shape to a concave shape, then to a convex shape. Comparisons with p+p data suggest that the away-side distribution can be divided into a partially suppressed "head" region centered at Δϕ~π, and an enhanced "shoulder" region centered at Δϕ~π±1.1. The pT spectrum for the associated hadrons in the head region softens toward central collisions. The spectral slope for the shoulder region is independent of centrality and trigger pT. The properties of the near-side distributions are also modified relative to those in p+p collisions, reflected by the broadening of the jet shape in Δϕ and Δη, and an enhancement of the per-trigger yield. However, these modifications seem to be limited to pT≲4 GeV/c, above which both the hadron pair shape and per-trigger yield become similar to p+p collisions. These observations suggest that both the away- and near-side distributions contain a jet fragmentation component which dominates for pT≳5 GeV/c and a medium-induced component which is important for pT≲4 GeV/c. We also quantify the role of jets at intermediate and low pT through the yield of jet-induced pairs in comparison with binary scaled p+p pair yield. The yield of jet-induced pairs is suppressed at high pair proxy energy (sum of the pT magnitudes of the two hadrons) and is enhanced at low pair proxy energy. The former is consistent with jet quenching; the latter is consistent with the enhancement of soft hadron pairs due to transport of lost energy to lower pT.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is made available in accordance with publishers policy. It may be subject to U.S. copyright law.en_US
dc.rights.urihttps://journals.aps.org/info/terms.htmlen_US
dc.titleDihadron azimuthal correlations in Au+Au collisions at √sNN=200 GeVen_US
dc.typeArticleen_US
dc.identifier.doi10.1103/PhysRevC.78.014901


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