2018 Impact factor 4.843
Particles and Fields
Eur. Phys. J. C 28, 437-449 (2003)
DOI: 10.1140/epjc/s2003-01201-x

## Measurement of the inclusive D production in collisions at LEP

The ALEPH Collaboration

(Received: 13 January 2003 / Published online: 13 May 2003 )

Abstract
The inclusive production of D mesons in two-photon collisions is measured with the ALEPH detector at e+e- centre-of-mass energies from 183 GeV to 209 GeV. A total of D meson events are observed from an integrated luminosity of . Contributions from direct and single-resolved processes are separated using the ratio of the transverse momentum of the D to the visible invariant mass Wvis of the event. Differential cross sections of D production as functions of and the pseudorapidity are measured in the range and . They are compared to next-to-leading order (NLO) perturbative QCD calculations. The extrapolation of the integrated visible D cross section to the total charm cross section, based on the Pythia Monte Carlo program, yields .

© Società Italiana di Fisica, Springer-Verlag 2003