This title appears in the Scientific Report : 2000 

Measurement of azimuthal asymmetries in deep inelastic scattering
Cloth, P.
Filges, D. / Members of the ZEUS Collaboration
Institut für Kernphysik; IKP
Physics letters / B, 481 (2000) S. 199 - 212
Amsterdam North-Holland Publ. 2000
199 - 212
Journal Article
Teilchentransport, Detektorentwicklung und Simulationi
Physics Letters B 481
The distribution of the azimuthal angle for the charged hadrons has been studied in the hadronic centre-of-mass system for neutral current deep inelastic positron-proton scattering with the ZEUS detector at HERA. Measurements of the dependence of the moments of this distribution on the transverse momenta of the charged hadrons are presented. Asymmetries that can be unambiguously attributed to perturbative QCD processes have been observed for the first time. (C) 2000 Elsevier Science B.V. All rights reserved.