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arXiv · 1205.5724

Neutral pion and $η$ meson production in proton-proton collisions at $\sqrt{s}=0.9$ TeV and $\sqrt{s}=7$ TeV

ALICE Collaboration
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Abstract

The first measurements of the invariant differential cross sections of inclusive $π^0$ and $η$ meson production at mid-rapidity in proton-proton collisions at $\sqrt{s}=0.9$ TeV and $\sqrt{s}=7$ TeV are reported. The $π^0$ measurement covers the ranges $0.4<p_T<7$ GeV/$c$ and $0.3<p_T<25$ GeV/$c$ for these two energies, respectively. The production of $η$ mesons was measured at $\sqrt{s}=7$ TeV in the range $0.4<p_T<15$ GeV/$c$. Next-to-Leading Order perturbative QCD calculations, which are consistent with the $π^0$ spectrum at $\sqrt{s}=0.9$ TeV, overestimate those of $π^0$ and $η$ mesons at $\sqrt{s}=7$ TeV, but agree with the measured $η/π^0$ ratio at $\sqrt{s}=7$ TeV.

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ALICE Collaboration. 2017-04-05. Neutral pion and $η$ meson production in proton-proton collisions at $\sqrt{s}=0.9$ TeV and $\sqrt{s}=7$ TeV. https://doi.org/10.1016/j.physletb.2012.09.015

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