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arXiv · 0804.3038

High p_T Triggered Delta-eta,Delta-phi Correlations over a Broad Range in Delta-eta

Edward Wenger
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Abstract

The first measurement of pseudorapidity (Delta-eta) and azimuthal angle (Delta-phi) correlations between high transverse momentum charged hadrons (p_T > 2.5 GeV/c) and all associated particles is presented at both short- (small Delta-eta) and long-range (large Delta-eta) over a continuous pseudorapidity acceptance (-4<Delta-eta<2). In these proceedings, the various near- and away-side features of the correlation structure are discussed as a function of centrality in Au+Au collisions measured by PHOBOS at sqrt(s_NN)=200 GeV. In particular, this measurement allows a much more complete determination of the longitudinal extent of the ridge structure, first observed by the STAR collaboration over a limited eta range. In central collisions the ridge persists to at least Delta-eta=4, diminishing in magnitude as collisions become more peripheral until it disappears around Npart=80.

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Edward Wenger. 2008-05-19. High p_T Triggered Delta-eta,Delta-phi Correlations over a Broad Range in Delta-eta. https://doi.org/10.1088/0954-3899%2F35%2F10%2F104080

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