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 s=0.9TeV and s=7TeV are reported. The π 0 measurement covers the ranges 0.4<p T<7GeV/c and 0.3<p T<25GeV/c for these two energies, respectively. The production of η mesons was measured at s=7TeV 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 s=0.9TeV, overestimate those of π 0 and η mesons at s=7TeV, but agree with the measured η/π 0 ratio at s=7TeV. © 2012 CERN.
Neutral pion and η meson production in proton-proton collisions at s=0.9TeV and s=7TeV
CAFFARRI, DAVIDE;LUNARDON, MARCELLO;MORANDO, MAURIZIO;MORETTO, SANDRA;SCARLASSARA, FERNANDO;SEGATO, GIANFRANCO;SORAMEL, FRANCESCA;VIESTI, GIUSEPPE;
2012
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 s=0.9TeV and s=7TeV are reported. The π 0 measurement covers the ranges 0.4<p T<7GeV/c and 0.3<p T<25GeV/c for these two energies, respectively. The production of η mesons was measured at s=7TeV 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 s=0.9TeV, overestimate those of π 0 and η mesons at s=7TeV, but agree with the measured η/π 0 ratio at s=7TeV. © 2012 CERN.File in questo prodotto:
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