The effect of triangular flow in jet-medium interaction

When jets pass through the hot dense QCD medium created in heavy ion collisions, some exotic structures are observed. There is enhancement of jet-associated particle yields in the $\eta$ direction along trigger jets, known as ``the ridge.'' Opposing jets show a double peak structure,referred to as the shoulder and head. One possible explanation for the ridge and shoulder is triangular flow, or $v_3$. We present the two particle $\Delta\eta$-$\Delta\phi$ correlations at PHENIX. We measure $v_3$, and include background modulation by $v_3$ when analyzing jet data. The effect of $v_3$ is to redistribute the excess associated particle yield of the ridge in the $\Delta\phi$ direction, not changing the fact that excess yield exists. We will show how $v_3$ affects unfolding the jet signal from the underlying event, with two different methods of normalizing the level of the background.