From a sample of 1.5 million Z0qq decays collected by the DELPHI detector during 1991, 1992 and 1993, the production cross section for isolated final state photons is measured and is compared with the(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 valuesc23=091+025−036 andc13=162+024−017 are compatible with the Standard Model prediction,c23=1145 andc13=1477 .
Study of prompt photon production in hadronic $Z^0$ decays / Delphi, Collaboration; Abreu, P.; Adam, W.; Canale, Vincenzo. - In: ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS. - ISSN 0170-9739. - STAMPA. - 69:(1995), pp. 1-13. [10.1007/s002880050001]
Study of prompt photon production in hadronic $Z^0$ decays
CANALE, VINCENZO
1995
Abstract
From a sample of 1.5 million Z0qq decays collected by the DELPHI detector during 1991, 1992 and 1993, the production cross section for isolated final state photons is measured and is compared with the(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 valuesc23=091+025−036 andc13=162+024−017 are compatible with the Standard Model prediction,c23=1145 andc13=1477 .I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
