The decays η → γγ and η′ → ηπ+π− have been observed in hadronic decays of the Z produced at LEP. The fragmentation functions of both the η and η′ have been measured. The measured multiplicities for x > 0.1 are 0.298±0.023±0.021 and 0.068±0.016 for η and η′ respectively. While the fragmentation function for the η is fairly well described by the JETSET Monte Carlo, it is found that the production rate of the η′ is a factor of four less than the corresponding prediction.

Measurement of the production rates of η and η′ in hadronic Z decays / D. Buskulic, D. Decamp, C. Goy, J.-P. Lees, M.-N. Minard, B. Mours, R. Alemany, F. Ariztizabal, P. Comas, J.M. Crespo, M. Delfino, E. Fernandez, V. Gaitan, Ll. Garrido, A. Pacheco, A. Pascual, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 292:(1992), pp. 210-220. [10.1016/0370-2693(92)90633-F]

Measurement of the production rates of η and η′ in hadronic Z decays

FOCARDI, ETTORE;
1992

Abstract

The decays η → γγ and η′ → ηπ+π− have been observed in hadronic decays of the Z produced at LEP. The fragmentation functions of both the η and η′ have been measured. The measured multiplicities for x > 0.1 are 0.298±0.023±0.021 and 0.068±0.016 for η and η′ respectively. While the fragmentation function for the η is fairly well described by the JETSET Monte Carlo, it is found that the production rate of the η′ is a factor of four less than the corresponding prediction.
1992
292
210
220
D. Buskulic;D. Decamp;C. Goy;J.-P. Lees;M.-N. Minard;B. Mours;R. Alemany;F. Ariztizabal;P. Comas;J.M. Crespo;M. Delfino;E. Fernandez;V. G...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/638292
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