Inclusive production of charged hadrons and K0(S) mesons in photon-photon collisions
Collaboration
24 pages
Published in:
- Eur.Phys.J.C 6 (1999) 253-264
e-Print:
- hep-ex/9808009 [hep-ex]
Report number:
- CERN-EP-98-091,
- CERN-EP-98-91
Experiments:
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Citations per year
Abstract:
The production of charged hadrons and K_s mesons in the collisions of quasi-real photons has been measured using the OPAL detector at LEP. The data were taken at e+e- centre-of-mass energies of 161 and 172 GeV. The differential cross-sections as a function of the transverse momentum and the pseudorapidity of the charged hadrons and K_s mesons have been compared to the leading order Monte Carlo simulations of PHOJET and PYTHIA and to perturbative next-to-leading order (NLO) QCD calculations. The distributions have been measured in the range 10-125 GeV of the hadronic invariant mass W. By comparing the transverse momentum distribution of charged hadrons measured in gamma-gamma interactions with gamma-proton and meson-proton data we find evidence for hard photon interactions in addition to the purely hadronic photon interactions.- electron positron: colliding beams
- exchange: two-photon
- photon photon: interaction
- charged particle: photoproduction
- K0(S): photoproduction
- hadron: multiple production
- differential cross section: transverse momentum
- differential cross section: rapidity dependence
- quantum chromodynamics: perturbation theory
- hard scattering
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