Study of prompt photon production in hadronic Z° decays.
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Study of prompt photon production in hadronic Z° decays.

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Study of prompt photon production in hadronic Z° decays.

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DELPHI Collaboration; Castillo Giménez, María Victoria Perfil; Ferrer Soria, Antonio Perfil; Higón Rodríguez, Emilio Perfil; Chrin, J. T. M.; Cortina Gil, Eduardo; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; Gómez Cadenas, Juan José Perfil; Hernández Rey, Juan José Perfil; Hernando Morata, José Ángel; Lacasta Llácer, Carlos; Martínez Vidal, Fernando Perfil; Martí García, Salvador; Navas Concha, Sergio; Salt Cairols, José Perfil; Valls Ferrer, Juan Antonio; Lozano Bahilo, José Julio
Aquest document és un/a article, creat/da en: 1995

Este documento está disponible también en : http://dx.doi.org/10.1007/s002880050001
From a sample of 1.5 million Z0 ! qq decays collected by the DELPHI detector during 1991, 1992 and 1993, the production cross section for isolated nal state photons is measured and is compared with the O( ; s) matrix element calculations implemented in the EEPRAD and GNJETS Monte Carlo generators. The observed photon yield is used to derive the electroweak couplings of charge 2/3 (u-type) and charge 1/3 (d-type) quarks to the Z0 boson. The measured values c2=3 = 0:91+0:25 0:36 and c1=3 = 1:62+0:24 0:17 are compatible with the Standard Model prediction, c2=3 = 1:145 and c1=3 = 1:477.

    DELPHI Collaboration Castillo Giménez, María Victoria Ferrer Soria, Antonio Higón Rodríguez, Emilio 1995 Study of prompt photon production in hadronic Z° decays. Zeitschrift für Physik C-Particles and Fields 69 1 1 13
http://dx.doi.org/10.1007/s002880050001
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