For the first time at LEP the production of prompt photons is studied in the collisions of quasi-real photons using the OPAL data taken at e +e- centre-of-mass energies between 183 GeV and 209 GeV. The total inclusive production cross-section for isolated prompt photons in the kinematic range of transverse momentum pTγ > 3.0 GeV and pseudorapidity |ηγ| < 1 is determined to be σtot = 0.32 ± 0.04 (stat) ± 0.04 (sys) pb. Differential cross-sections are compared to the predictions of a next-to-leading-order (NLO) calculation.
All Science Journal Classification (ASJC) codes
- Engineering (miscellaneous)
- Physics and Astronomy (miscellaneous)