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Figure 2

Charged-particle associated yields relative to $\pi^{0}$ trigger particles versus $\dphi$ in pp collisions at $\snn=2.76$ TeV. The $\pi^{0}$ trigger momentum range is $8< p_{\mathrm{T}}^{\rm trig} < 16~\mathrm{GeV}/c$, and associated charged particle ranges are $0.5 < p_{\mathrm{T}}^{\rm assoc} < 1$, $1 < p_{\mathrm{T}}^{\rm assoc} < 2$, $2 < p_{\mathrm{T}}^{\rm assoc} < 4$ and $4 < p_{\mathrm{T}}^{\rm assoc} < 6~\mathrm{GeV}/c$. The bars represent statistical uncertainties, the boxes uncorrelated systematic uncertainties. Dashed lines correspond to the estimated background using the ZYAM procedure described in the text. The range of the vertical axis is adjusted for each panel, and ``zero'' is not shown in all cases
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