Figure 13

Gaussian radii as a function of $\left< {\rm d}N_{ch}/{\rm d}\eta\right>^{(1/3)}$, for $\sqrt{s} = 0.9~$TeV and $7~$TeV,compared to the results from (heavy-)ion collisions at RHIC [32,33] and SPS [34]. Panel a) shows $R^G_{out}$, b) shows$R^G_{side}$, c) shows $R^G_{long}$. All results are for $\left< k_{\rm T}\right>=0.4~$GeV/$c$, except the values from thePHENIX experiment, which are at $\left< k_{\rm T}\right>=0.45~$GeV/$c$
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