학술논문
Measurement of inclusive γ and π0 spectra and a comparison of the neutral and charged components in hadronic events ine+ e− annihilation at 34 GeV
Document Type
Article
Author
Behrend, H. J.; Chen, Ch.; Fenner, H.; Field, J. H.; Schröder, V.; Sindt, H.; D'Agostini, G.; Apel, W. -D.; Banerjee, S.; Bodenkamp, J.; Chrobaczek, D.; Engler, J.; Flügge, G.; Fries, D. C.; Fues, W.; Gamerdinger, K.; Hopp, G.; Küster, H.; Müller, H.; Randoll, H.; Schmidt, G.; Schneider, H.; de Boer, W.; Buschhorn, G.; Grindhammer, G.; Grosse-Wiesmann, P.; Gunderson, B.; Kiesling, C.; Kotthaus, R.; Kruse, U.; Lierl, H.; Lücrs, D.; Meyer, T.; Oberlack, H.; Schacht, P.; Schachter, M. J.; Snyder, A.; Steiner, H.; Carnesecchi, G.; Colas, P.; Cordier, A.; Davier, M.; Fournier, D.; Grivaz, J. F.; Haissinski, J.; Journé, V.; Klarsfeld, A.; Laplanche, F.; Le Diberder, F.; Mallik, U.; Veillet, J. J.; George, R.; Goldberg, M.; Grossetête, B.; Hamon, O.; Kapusta, F.; Kovacs, F.; London, G.; Poggioli, L.; Rivoal, M.; Aleksan, R.; Bouchez, J.; Cozzika, G.; Ducros, Y.; Gaidot, A.; Jadach, S.; Lavagne, Y.; Pamela, J.; Pansart, J. P.; Pierre, F.
Source
Zeitschrift für Physik C Particles and Fields; September 1982, Vol. 14 Issue: 3 p189-195, 7p
Subject
Language
ISSN
01709739; 14315858
Abstract
The photonic part of multihadronice+ e- annihilation events has been analyzed at a c.m. energy of 34 GeV. The photonic energy fraction per event is determined to bef? =0.251±0.003 (stat.) ±0.04 (syste.). The neutral and charged components of the events are analyzed separately revealing close similarity in thrust axis directions and momentum distributions in agreement with the hypothesis that most photons result from p0 decay. p0 's are reconstructed separately and used to determine the inclusive cross section. Comparing these cross sections with lower energy data from SPEAR we find some indication for scaling violation.