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Measurement of isolated photon production in hadronic Z decays

Research output: Contribution to journalJournal article


Journal publication date1991
JournalPhysics Letters B
Number of pages11
Original languageEnglish


The production of high energy isolated photons in hadronic Z decays is measured with the ALEPH detector at LEP using a sample of 180 000 hadronic events. Such photons are mainly radiated by quarks, thus giving direct insights into the early parton showering mechanism. The observed rate is compared with a QCD calculation of final state radiation from quarks.