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We report the first three-particle coincidence measurement in pseudorapidity (Δη) between a high transverse momentum (p_) trigger particle and two lower p_ associated particles within azimuth |Δϕ|<0.7 in √( s_NN) = 200 GeV d+Au and Au+Au collisions. Charge ordering properties are exploited to separate the jet-like component and the ridge (long-range Δη correlation). The results indicate that the particles from the ridge are uncorrelated in Δη not only with the trigger particle but also betweendoi:10.1103/physrevlett.105.022301 pmid:20867701 fatcat:3i6qm2idjjak5g2mlmk6mx6a6a