Correlation strength $b_{corr}$ at $\sqrt{s}=7$ TeV for separated pseudorapidity window pairs, measured in $\pt$ intervals with same $\langle \rm n_{\rm ch}\rangle$, as a function of $\pt^{min}$ for each interval Values are shown for $\eta_{gap}$=0, 1.2 with $\delta\eta$=0.2