1993/10/12 by John Ellis, Marek Karliner, Ellis, John +1
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.hep-ph/9310272
openalex publication_date 1993/10/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We review the theory and phenomenology of deep inelastic polarized lepton-nucleon scattering in the light of recent data with a deuteron target from the SMC at CERN and a Helium 3 target from the E142 experiment at SLAC. After including higher-order perturbative QCD corrections, mass corrections and updated estimates of higher-twist effects, we find good agreement with the basic Bjorken sum rule, and extract a consistent set of values for the quark contributions to the proton spin: ΔΣ≡ Δu + Δd + Δs = 0.27 ± 0.11 Δu = 0.82 ± 0.04, Δd = -0.44 ± 0.04,Δs = -0.11 ± 0.04 which are consistent with chiral soliton models and indications from lattice estimates. We also mention the prospects for future experiments on the spin structure of the nucleon.