Direct pion production dominates at high transverse momentum in semi-inclusive electroproduction, and its cross section factorizes to allow extraction of high-x PDFs and the pion distribution amplitude.
Semi-Exclusive Pion Production in Deep-Inelastic Scattering
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We calculate azimuthal asymmetries and the Callan-Gross $R$-ratio for semi-exclusive pion production in deep inelastic scattering taking into account higher twist effects. Our results are qualitatively different from the QCD-improved parton model predictions for semi-inclusive deep inelastic scattering.
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Semi-inclusive pion electroproduction at the highest transverse momenta
Direct pion production dominates at high transverse momentum in semi-inclusive electroproduction, and its cross section factorizes to allow extraction of high-x PDFs and the pion distribution amplitude.