Three particle pseudorapidity correlations in STAR

We present new results from 3-particle pseudorapidity (Δη) correlation at mid-rapidity in image collisions at image, measured by the STAR experiment. The charge ordering properties between associated and trigger particles are exploited to separate jet-like and ridge contributions in 3-particle image correlations. We found that like-sign triplets are dominated by ridge. The separated ridge, while narrow in Δϕ, is extremely broad in Δη. The results indicate that the correlation of ridge particles are uniform not only with respect to the trigger particle but also between themselves event-by-event in our measured Δη. In addition, the production of the ridge appears to be uncorrelated to the presence of the narrow jet-like component.