Dihadron azimuthal correlations in Au+Au collisions at root s(NN)=200 GeV

dc.contributor.author Adare, Andrew
dc.contributor.author Belikov, Sergey
dc.contributor.author Ogilvie, Craig
dc.contributor.author Constantin, Paul
dc.contributor.author Grau, Nathan
dc.contributor.author Hill, John
dc.contributor.author Lajoie, John
dc.contributor.author Lebedev, Alexandre
dc.contributor.author Ogilvie, Craig
dc.contributor.author Pei, H.
dc.contributor.author Rak, Jan
dc.contributor.author Rosati, Marzia
dc.contributor.author Skutnik, S.
dc.contributor.author Vale, Carla
dc.contributor.author et al.
dc.contributor.department Physics and Astronomy
dc.date 2018-02-18T13:16:26.000
dc.date.accessioned 2020-06-30T06:18:32Z
dc.date.available 2020-06-30T06:18:32Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2008
dc.date.issued 2008-07-01
dc.description.abstract <p>Azimuthal angle (Delta phi) correlations are presented for a broad range of transverse momentum (0.4 < p(T) < 10 GeV/c) and centrality (0-92%) selections for charged hadrons from dijets in Au+Au collisions at root s(NN) = 200 GeV. With increasing p(T), the away-side Delta phi 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 Delta phi similar to pi, and an enhanced "shoulder" region centered at Delta phi similar to pi +/- 1.1. The p(T) 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 p(T). 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 Delta phi and Delta eta, and an enhancement of the per-trigger yield. However, these modifications seem to be limited to p(T)less than or similar to 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 p(T) greater than or similar to 5 GeV/c and a medium-induced component which is important for p(T) less than or similar to 4 GeV/c. We also quantify the role of jets at intermediate and low p(T) 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 p(T) 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 p(T).</p>
dc.description.comments <p>This article is published as Adare, A., S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander et al. "Dihadron azimuthal correlations in Au+ Au collisions at s NN= 200 GeV." <em>Physical Review C</em> 78, no. 1 (2008): 014901. DOI:<a href="http://dx.doi.org/10.1103/PhysRevC.78.014901" target="_blank">10.1103/PhysRevC.78.014901</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/physastro_pubs/299/
dc.identifier.articleid 1324
dc.identifier.contextkey 10254672
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath physastro_pubs/299
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/57054
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/physastro_pubs/299/2008_Ogilvie_DihadronAzimuthal.pdf|||Fri Jan 14 23:15:57 UTC 2022
dc.source.uri 10.1103/PhysRevC.78.014901
dc.subject.disciplines Nuclear
dc.subject.disciplines Physics
dc.title Dihadron azimuthal correlations in Au+Au collisions at root s(NN)=200 GeV
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 0c7465f3-a076-4319-9513-6cd51186bbf6
relation.isOrgUnitOfPublication 4a05cd4d-8749-4cff-96b1-32eca381d930
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