The first measurements of the invariant differential cross sections of inclusive π0 and η meson production at mid-rapidity in proton–proton collisions at √s=0.9 TeV and √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 √s=7 TeV in the range 0.4<pT<15 GeV/c. Next-to-Leading Order perturbative QCD calculations, which are consistent with the π0 spectrum at √s=0.9 TeV, overestimate those of π0 and η mesons at √s=7 TeV, but agree with the measured η/π0 ratio at √s=7 TeV .
|Autori interni:||BRUNO, Giuseppe Eugenio|
|Titolo:||Neutral pion and η meson production in proton–proton collisions at √s=0.9 TeV and √s=7 TeV|
|Rivista:||PHYSICS LETTERS. SECTION B|
|Data di pubblicazione:||2012|
|Digital Object Identifier (DOI):||10.1016/j.physletb.2012.09.015|
|Appare nelle tipologie:||1.1 Articolo in rivista|