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- W2803018538 abstract "An invariant differential cross section measurement of inclusive $pi^{0}$ and $eta$ meson production at mid-rapidity in pp collisions at $sqrt{s}=8$ TeV was carried out by the ALICE experiment at the LHC. The spectra of $pi^{0}$ and $eta$ mesons were measured in transverse momentum ranges of $0.3<p_{rm T}<35$ GeV/$c$ and $0.5<p_{rm T}<35$ GeV/$c$, respectively. Next-to-leading order perturbative QCD calculations using fragmentation functions DSS14 for the $pi^{0}$ and AESSS for the $eta$ overestimate the cross sections of both neutral mesons, although such calculations agree with the measured $eta/pi^{0}$ ratio within uncertainties. The results were also compared with PYTHIA~8.2 predictions for which the Monash~2013 tune yields the best agreement with the measured neutral meson spectra. The measurements confirm a universal behavior of the $eta/pi^{0}$ ratio seen for NA27, PHENIX and ALICE data for pp collisions from $sqrt{s}=27.5$ GeV to $sqrt{s}=8$ TeV within experimental uncertainties. A relation between the $pi^{0}$ and $eta$ production cross sections for pp collisions at $sqrt{s}=8$ TeV is given by $m_{rm T}$ scaling for $p_{rm T}>3.5$ GeV/$c$. However, a deviation from this empirical scaling rule is observed for transverse momenta below $p_{rm T}<3.5$ GeV/$c$ in the $eta/pi^0$ ratio with a significance of $6.2sigma$." @default.
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