Neutral pion and η meson production in proton-proton collisions at √s=0.9 TeV and √s=7 TeV

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900 GeV
7 TeV
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The first measurements of the invariant differential cross sections of inclusive π0 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 π0 measurement covers the ranges 0.4 < pt < 7 GeV/c and 0.3 < pt < 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 < pt < 15 GeV/c. Next-to-Leading Order perturbative QCD calculations are consistent with the π0 spectrum at sqrt(s) = 0.9 TeV, overestimate those of π0 and η mesons at sqrt(s) = 7 TeV, but agree with the measured η/π 0 ratio at sqrt(s) = 7 TeV.