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A reaction plane dependent event mixing technique is developed to remove the collective
\nbackground from two particle correlation measurements in heavy ion collisions. The
\nmethod eliminates the need for any external flow measurements and is well suited for
\nstudying the path length dependence of particle production in quark-gluon plasma. Central
\nto mid-central, as well as in vs out-of-plane, per neutral pion trigger integrated away-side
\nhadron yield comparisons are made. Results suggest a significant path length dependent
\npartonic energy loss in the medium. A tagging method is also introduced to measure the
\ndirect photon yield for various collision criteria. Direct photon – hadron yields are
\nmeasured. A comparison of central to mid-central yields reveals a significant suppression of
\nthe away-side hadrons in higher multiplicity events. The reaction plane dependence of the
\nassociated away-side yield is explored.

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