Figure 9

Mean transverse momentum $\langle p_{\rm T} \rangle$ for $\rm K^{*0}$ (a) and $\Phi$ mesons (b) as a function of $\langle N_{part} \rangle$ in Pb-Pb collisions at $\snn$ = 2.76 TeV. Also shown are measurements of $\langle p_{\rm T} \rangle$ for minimum-bias pp collisions at $\sqrt{s}$ = 7 TeV and $\langle p_{\rm T} \rangle$ for pp and Au-Au collisions at $\snn$ = 200 GeV. Statistical uncertainties are shown as bars and systematic uncertainties are shown as boxes. The most peripheral $\rm K^{*0}$ points for A-A collisions (with $\langle N_{part} \rangle\approx 20$) have been shifted horizontally for visibility. The two most central $\Phi$ points for Au-Au collisions are for overlapping centrality intervals (0-5% and 0-10%).