Intra-jet correlations of high-$p_t$ hadrons from STAR

Abstract

Systematic measurements of pseudorapidity ($\Delta \eta$) and azimuthal ($\Delta \varphi$) correlations between high-$p_t$ charged hadrons in $\sqrt{s_{NN}}$=200 GeV Au+Au collisions are presented. An enhancement of correlated yield at large $\Delta \eta$ on the near-side is observed. This effect persists up to trigger $p_t^{trig}$ $\sim$ 9 GeV/c, indicating that it is associated with jet production. More detailed analysis suggests distinct short-range and long-range components in the correlation.

4 pages, 5 figures, presented at the 19th International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, "Quark Matter 2006", Shanghai, China, November 14-20, 2006

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