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Figure 2

$\phi$-meson cross section as a function of $\pt$ in pp collisions at $\sqrt{s} = 2.76$ TeV. Error bars and boxes represent statistical and systematic uncertainties, respectively. Predictions from PHOJET and the PYTHIA tunes ATLAS-CSC, D6T, Perugia0 and Perugia11 are also shown for comparison, as well as the result of a fit with the Levy-Tsallis function defined by Eq. (1).
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