2006/11/30 by V. M. Braun, Dmitry Yu. Ivanov, D. Yu. Ivanov +3
Physics and Astronomy · #Algebra over a field #Amplitude #Current algebra #Deep inelastic scattering #Geometry #Helicity #High-Energy Particle Collisions Research #Inelastic scattering #Limit (mathematics) #Nuclear physics #Nucleon #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Perturbative QCD #Physics #Pion #Proton #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Scattering #Twist #hep-ph
paper · pdf · doi:10.1103/physrevd.75.014021
published as Phys.Rev.D75:014021,2007 · 21 pages, 3 figures
arxiv created 2006/11/30 · openalex publication_date 2007/01/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the cross section of the deep inelastic pion electroproduction on a proton target at threshold for Q2 in the region 5--10 GeV2. The corresponding amplitudes are described in terms of two form factors which we calculate using light-cone sum rules to leading order in QCD and including higher twist corrections. Our results suggest a considerable change from a small Q2 region that can be treated in the soft-pion limit using current algebra. In particular, we obtain a \ensuremathπ0 to \ensuremathπ+ production ratio of order 1/3 and significant nucleon helicity-flip contributions.