Production of Neutral Pions and Eta-mesons in pp Collisions Measured with ALICE

Details Production of Neutral Pions and Eta-mesons in pp Collisions Measured with ALICE Production of Neutral Pions and Eta-mesons in pp Collisions Measured with ALICE

2011-06-29

arxiv.org/abs/1106.5932v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 2 figures, to appear in the proceedings of the XXII International Conference on Ultra-Relativistic Nucleus-Nucleus Co

Scientific paper

Invariant cross sections for neutral pions and eta mesons in pp collisions at sqrt(s) = 0.9, 2.76, and 7 TeV were measured by the ALICE detector at the Large Hadron Collider. Next-to-leading order (NLO) perturbative QCD calculations describe the pi0 and eta spectra at 0.9 TeV, but overestimate the measured cross sections at 2.76 TeV and 7 TeV. The measured eta/pi0 ratio is consistent with mT scaling at 2.76 TeV. At 7 TeV indications for a violation of mT scaling were found.

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