Measurement of Azimuthal Asymmetries in Deep Inelastic Scattering
ZEUS Collaboration
TL;DR
This paper reports the first observation of azimuthal asymmetries in deep inelastic scattering attributable to perturbative QCD, measured through charged hadron distributions at HERA.
Contribution
It provides the first measurement of azimuthal asymmetries in deep inelastic scattering linked to perturbative QCD processes.
Findings
Azimuthal asymmetries observed in charged hadron distributions.
Dependence of asymmetries on transverse momentum measured.
Results support perturbative QCD predictions.
Abstract
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.
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