"Figure 4.2" of "General balance functions of identified charged hadron pairs of $(\pi,{\rm K},{\rm p})$ in Pb$-$Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV"

Azimuthal ($\Delta\varphi$) $\sigma$ widths of balance functions of the full species matrix of $\pi^{\pm}$, ${\rm K}^{\pm}$, and ${\rm p/\bar{p}}$ with centrality. Pairs ${\rm K}\pi$, ${\rm p}\pi$, and ${\rm pK}$ have the same values with $\pi{\rm K}$, $\pi{\rm p}$, and ${\rm Kp}$, respectively. The relative rapidity range used for all species pairs is $|\Delta y|\leq 1.2$, with the exception of $|\Delta y|\leq 1.4$ for $\pi\pi$ and $|\Delta y|\leq 1.0$ for $\rm pp$ ($\pi,{\rm K}: 0.2 \leq p_{\rm T} \leq 2.0\;{\rm GeV}/c$; ${\rm p}: 0.5 \leq p_{\rm T} \leq 2.5\;{\rm GeV}/c$).