Figure 2

Differential $\phi$ meson production cross section $\mathrm{d}^2\sigma/(\mathrm{d}y\mathrm{d}\pt)$ as a function of $\pt$ at $\sqrt{s}=5.02$~TeV, $\sqrt{s}=8$~TeV and $\sqrt{s}=13$~TeV, measured in the $\mu^+\mu^-$ decay channel in the rapidity interval $2.5< y symbols="" and="" in="" the="" k="" channel="" at="" midrapidity="" boxes="" represent="" systematic="" uncertainties="" error="" bars="" statistical="" uncertainties.="" data="" points="" are="" fitted="" with="" a="" levy-tsallis="" function="" see="" eq.="" ratio="" between="" fit="" forward="" rapidity="" is="" plotted="" bottom="" panels.="">< /y>