Testing QCD: Direct photons in e+e- collisions

K. Koller, T. F. Walsh, P. M. Zerwas

Research output: Contribution to journalArticlepeer-review

62 Scopus citations


We discuss QCD predictions for the production of direct photons in e+e- collisions, e+e-→ γ*→γ+ hadrons (C=+). A simple derivation of the QCD results for the structure functions is presented. These turn out to be exactly predicted by the theory, in contrast to hadron production where only the change with Q2 is predictable. We also take up the phenomenology of this process. A dramatic rise of the γ/π0 ratio with z=Eγ/EB(Eπ/EB) and with Q2 is predicted.

Original languageEnglish (US)
Pages (from-to)197-203
Number of pages7
JournalZeitschrift für Physik C Particles and Fields
Issue number3
StatePublished - Sep 1979


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