11  (deg) φ Δ -150 -100 -50 0 50 100 150 η Δ -1.5 -1 -0.5 0 0.5 1 1.5 0 0.01 0.02 0.03 0.04 0.05 0 to 5% Centrality Ridge signal FIG. 7: The ridge signal is the piece of the CI correlation for the 0-5% centrality of Fig. 6 after removing all other particle pairs except the pairs that come from the same bubble. It is plotted as a two dimensional Δ φ vs. Δ η perspective plot. As explained in the text charge pair correlations formed by particles emitted from different bubbles are small contributors which mainly have some effect on the away side correlation for Δ φ greater than about 120 ◦ . D. Comparison to data Triggered angular correlation data showing the ridge was presented at Quark Matter 2006[31]. Fig- ure 11 shows the experimental Δ φ vs. Δ η CI cor- relation for the 0-10% central Au Au collisions at √ s NN = 200 GeV; requiring one trigger particle p t between 3 and 4 GeV/c and an associated particle p t above 2.0 GeV/c. The yield is corrected for the finite Δ η pair acceptance. For the PBM generator, we then form a two-charged-particle correlation be- tween one charged particle with a p t between 3.0 to 4.0 GeV/c and another charged particle whose p t is greater than 2.0 GeV/c. The results of this cor- relation is shown in Fig. 12. Figure 11 shows the corrected pair yield determined in the central data whereas Fig. 12 shows the correlation function gen- erated by the PBM which does not depend on the number of events analyzed. We can compare the two figures, if we realize that the away side ridge has around 420,000 pairs in Fig. 11 while in Fig. 12 the away side ridge has a correlation of around 0.995. If we multiply the correlation scale of Fig. 12 by 422,111 in order to achieve the number of pairs seen in Fig. 11, the away side ridge would be at 420,000 and the peak would be at 465,000. This would make a good agreement between the two figures. particle. The width of the φ spread is Δ φ = 40 ◦ . Therefore on a trigger by trigger basis we accumu- late particles from the ridge region (see Fig. 9) and form a p t spectrum of charged particles. We then form a ratio of the p t spectrum for the ridge region particles divided by the p t spectrum for all parti- cles in central Au Au events. This ratio is highly dependent on our ridge cut area. We can virtually remove this dependency by normalizing the two p t spectra to have the same counts for the 2.0 GeV/c bin. Figure 10 is this ratio which can be considered a correlation of particles as a function of p t in the ridge region compared to particles from the event in general. In Fig. 10 we form this ratio or correlation for the bubbles which have a correlated p t among the partons (GFTM like). We also show the correla- tion for bubbles which have a random p t distribution among partons in the bubble. For the random case the p t spectrum does not differ much from the aver- age p t spectrum while there is a big difference for the flux tube like case. This correlation could be easily measured in the RHIC data.