Measurement of isolated prompt photon production in photon-photon collisions at $\sqrt{s_{\rm ee}} = 183$ -209 GeV

2003 European Physical Journal C: Particles and Fields  
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 photon transverse momentum larger than 3.0 GeV and absolute photon pseudorapidity less than 1 is determined to be 0.32 +- 0.04 (stat) +- 0.04 (sys) pb. Differential cross-sections are compared to the
more » ... compared to the predictions of a next-to-leading-order (NLO) calculation.
doi:10.1140/epjc/s2003-01359-1 fatcat:xh76sdy3crhgtev75ystegfjfi