Journal article

Inclusive production of neutral pions in hadronic Z decays

R Barate, D Buskulic, D Decamp, P Ghez, C Goy, JP Lees, A Lucotte, MN Minard, JY Nief, P Odier, B Pietrzyk, MP Casado, M Chmeissani, P Comas, JM Crespo, M Delfino, E Fernandez, M Fernandez-Bosman, L Garrido, A Juste Show all

Zeitschrift fur Physik C-Particles and Fields | Published : 1997

Abstract

A measurement of the inclusive production of π0 mesons in hadronic Z decays is presented and compared to Monte Carlo model predictions. The analysis is based on approximately 2 million hadronic events recorded with the ALEPH detector at LEP at a centre-of-mass energy of √s = 91.2 GeV. Neutral pions are reconstructed using photons measured in the electromagnetic calorimeter and photons from conversion pairs. The inclusive π0 momentum spectrum is measured in the range 0.025 < xp = p/pbeam < 1. In this range the number of π0 per hadronic Z is found to be 4.80 ± 0.07(stat) ± 0.31(sys). The differential inclusive π0 cross section is also measured as a function of transverse momentum with respect ..

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