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Polarized Parton Densities
J. Blümlein, H. Böttcher
In this talk we summarize main results of a recent determination of the polarized deeply inelastic parton distributions to NLO from the world data. In the analysis the LO and NLO p…
Measurement of single-spin azimuthal asymmetries in semi-inclusive electroproduction of pions and kaons on a longitudinally polarised deuterium target
HERMES collaboration, A. Airapetian
Single-spin asymmetries have been measured for semi-inclusive electroproduction of , , and mesons in deep-inelastic scattering off a longitudinally polarised…
The Q^2-Dependence of Nuclear Transparency for Exclusive Production
HERMES Collaboration, A. Airapetian
Exclusive coherent and incoherent electroproduction of the meson from H and N targets has been studied at the HERMES experiment as a function of coherence length (…
Evidence for Quark-Hadron Duality in the Proton Spin Asymmetry
HERMES Collaboration, A. Airapetian
Spin-dependent lepton-nucleon scattering data have been used to investigate the validity of the concept of quark-hadron duality for the spin asymmetry . Longitudinally polaris…
Questions on Uncertainties in Parton Distributions
R. S. Thorne, H. Boettcher, A. M. Cooper-Sarkar +5
A discussion is presented of the manner in which uncertainties in parton distributions and related quantities are determined. One of the central problems is the criteria used to ju…
QCD Analysis of Polarized Deep Inelastic Data and Parton Distributions
J. Blümlein, H. Böttcher
A QCD analysis of the world data on polarized deep inelastic scattering is presented in leading and next-to-leading order. New parameterizations are derived for the quark and gluon…